Windows ARM runners.

wasi-sdk-28.
wazero v1.10.0.
2026-01-12 22:19:14 +00:00 · 2025-11-09 12:44:32 +00:00 · 2025-11-09 01:32:25 +00:00 · 2025-11-09 01:32:15 +00:00 · 2025-11-09 01:32:14 +00:00 · 2025-11-06 12:07:37 +00:00
200 changed files with 7821 additions and 2266 deletions
--- a/.github/workflows/libc.yml
+++ b/.github/workflows/libc.yml
@@ -0,0 +1,23 @@
+name: Benchmark libc
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        os: [ubuntu-24.04, ubuntu-24.04-arm, macos-15, macos-15-intel]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - uses: actions/checkout@v5
+    - uses: actions/setup-go@v6
+      with: { go-version: stable }
+
+    - name: Benchmark
+      shell: bash
+      run: sqlite3/libc/benchmark.sh
--- a/.github/workflows/repro.sh
+++ b/.github/workflows/repro.sh
@@ -1,28 +1,9 @@
 #!/usr/bin/env bash
 set -euo pipefail

-if [[ "$OSTYPE" == "linux"* ]]; then
-  WASI_SDK="https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-25/wasi-sdk-25.0-x86_64-linux.tar.gz"
-  BINARYEN="https://github.com/WebAssembly/binaryen/releases/download/version_122/binaryen-version_122-x86_64-linux.tar.gz"
-elif [[ "$OSTYPE" == "darwin"* ]]; then
-  WASI_SDK="https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-25/wasi-sdk-25.0-arm64-macos.tar.gz"
-  BINARYEN="https://github.com/WebAssembly/binaryen/releases/download/version_122/binaryen-version_122-arm64-macos.tar.gz"
-elif [[ "$OSTYPE" == "msys" || "$OSTYPE" == "cygwin" ]]; then
-  WASI_SDK="https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-25/wasi-sdk-25.0-x86_64-windows.tar.gz"
-  BINARYEN="https://github.com/WebAssembly/binaryen/releases/download/version_122/binaryen-version_122-x86_64-windows.tar.gz"
-fi
-
-# Download tools
-mkdir -p tools/
-[ -d "tools/wasi-sdk" ] || curl -#L "$WASI_SDK" | tar xzC tools &
-[ -d "tools/binaryen" ] || curl -#L "$BINARYEN" | tar xzC tools &
-wait
-
-[ -d "tools/wasi-sdk" ] || mv "tools/wasi-sdk"* "tools/wasi-sdk"
-[ -d "tools/binaryen" ] || mv "tools/binaryen"* "tools/binaryen"
-
 # Download and build SQLite
 sqlite3/download.sh
+sqlite3/tools.sh
 embed/build.sh
 embed/bcw2/build.sh

--- a/.github/workflows/repro.yml
+++ b/.github/workflows/repro.yml
@@ -17,13 +17,13 @@ jobs:

    steps:
    - uses: ilammy/msvc-dev-cmd@v1
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5

    - name: Build
      shell: bash
      run: .github/workflows/repro.sh

-    - uses: actions/attest-build-provenance@v2
+    - uses: actions/attest-build-provenance@v3
      if: matrix.os == 'ubuntu-latest'
      with:
        subject-path: |
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,16 +17,21 @@ on:
      - '**.yml'
  workflow_dispatch:

+permissions:
+  contents: read
+
 jobs:
  test:
    strategy:
      matrix:
        os: [macos-latest, ubuntu-latest, windows-latest]
    runs-on: ${{ matrix.os }}
+    permissions:
+      contents: write

    steps:
-    - uses: actions/checkout@v4
-    - uses: actions/setup-go@v5
+    - uses: actions/checkout@v5
+    - uses: actions/setup-go@v6
      with: { go-version: stable }

    - name: Format
@@ -93,27 +98,27 @@ jobs:
      matrix:
        os:
          - name: freebsd
-            version: '14.2'
+            version: '14.3'
            flags: '-test.v'
          - name: netbsd
            version: '10.1'
            flags: '-test.v'
          - name: freebsd
            arch: arm64
-            version: '14.2'
+            version: '14.3'
            flags: '-test.v -test.short'
          - name: netbsd
            arch: arm64
            version: '10.1'
            flags: '-test.v -test.short'
          - name: openbsd
-            version: '7.6'
+            version: '7.8'
            flags: '-test.v -test.short'
    runs-on: ubuntu-latest
    needs: test

    steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5

    - name: Build
      env:
@@ -123,7 +128,7 @@ jobs:
      run: .github/workflows/build-test.sh

    - name: Test
-      uses: cross-platform-actions/action@v0.27.0
+      uses: cross-platform-actions/action@v0.30.0
      with:
        operating_system: ${{ matrix.os.name }}
        architecture: ${{ matrix.os.arch }}
@@ -150,7 +155,7 @@ jobs:
    needs: test

    steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5

    - name: Build
      env:
@@ -169,8 +174,8 @@ jobs:

    steps:
    - uses: bytecodealliance/actions/wasmtime/setup@v1
-    - uses: actions/checkout@v4
-    - uses: actions/setup-go@v5
+    - uses: actions/checkout@v5
+    - uses: actions/setup-go@v6
      with: { go-version: stable }

    - name: Set path
@@ -190,8 +195,8 @@ jobs:

    steps:
    - uses: docker/setup-qemu-action@v3
-    - uses: actions/checkout@v4
-    - uses: actions/setup-go@v5
+    - uses: actions/checkout@v5
+    - uses: actions/setup-go@v6
      with: { go-version: stable }

    - name: Test 386 (32-bit)
@@ -211,20 +216,32 @@ jobs:
    needs: test

    steps:
-    - uses: actions/checkout@v4
-    - uses: actions/setup-go@v5
+    - uses: actions/checkout@v5
+    - uses: actions/setup-go@v6
      with: { go-version: stable }

    - name: Test
      run: go test -v ./...

  test-macintel:
-    runs-on: macos-13
+    runs-on: macos-15-intel
    needs: test

    steps:
-    - uses: actions/checkout@v4
-    - uses: actions/setup-go@v5
+    - uses: actions/checkout@v5
+    - uses: actions/setup-go@v6
+      with: { go-version: stable }
+
+    - name: Test
+      run: go test -v ./...
+
+  test-winarm:
+    runs-on: windows-11-arm
+    needs: test
+
+    steps:
+    - uses: actions/checkout@v5
+    - uses: actions/setup-go@v6
      with: { go-version: stable }

    - name: Test
--- a/README.md
+++ b/README.md
@@ -30,10 +30,10 @@ db.QueryRow(`SELECT sqlite_version()`).Scan(&version)

 - [`github.com/ncruces/go-sqlite3`](https://pkg.go.dev/github.com/ncruces/go-sqlite3)
  wraps the [C SQLite API](https://sqlite.org/cintro.html)
-  ([example usage](https://pkg.go.dev/github.com/ncruces/go-sqlite3#example-package)).
+  ([example](https://pkg.go.dev/github.com/ncruces/go-sqlite3#example-package)).
 - [`github.com/ncruces/go-sqlite3/driver`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/driver)
  provides a [`database/sql`](https://pkg.go.dev/database/sql) driver
-  ([example usage](https://pkg.go.dev/github.com/ncruces/go-sqlite3/driver#example-package)).
+  ([example](https://pkg.go.dev/github.com/ncruces/go-sqlite3/driver#example-package)).
 - [`github.com/ncruces/go-sqlite3/embed`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/embed)
  embeds a build of SQLite into your application.
 - [`github.com/ncruces/go-sqlite3/vfs`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs)
@@ -44,12 +44,19 @@ db.QueryRow(`SELECT sqlite_version()`).Scan(&version)
 ### Advanced features

 - [incremental BLOB I/O](https://sqlite.org/c3ref/blob_open.html)
+  ([example](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/blobio#example-package))
 - [nested transactions](https://sqlite.org/lang_savepoint.html)
+  ([example](https://pkg.go.dev/github.com/ncruces/go-sqlite3/driver#example-Savepoint))
 - [custom functions](https://sqlite.org/c3ref/create_function.html)
+  ([example](https://pkg.go.dev/github.com/ncruces/go-sqlite3#example-Conn.CreateFunction))
 - [virtual tables](https://sqlite.org/vtab.html)
+  ([example](https://pkg.go.dev/github.com/ncruces/go-sqlite3#example-CreateModule))
 - [custom VFSes](https://sqlite.org/vfs.html)
+  ([examples](vfs/README.md#custom-vfses))
 - [online backup](https://sqlite.org/backup.html)
+  ([example](https://pkg.go.dev/github.com/ncruces/go-sqlite3/driver#Conn))
 - [JSON support](https://sqlite.org/json1.html)
+  ([example](https://pkg.go.dev/github.com/ncruces/go-sqlite3/driver#example-package-Json))
 - [math functions](https://sqlite.org/lang_mathfunc.html)
 - [full-text search](https://sqlite.org/fts5.html)
 - [geospatial search](https://sqlite.org/geopoly.html)
@@ -57,7 +64,6 @@ db.QueryRow(`SELECT sqlite_version()`).Scan(&version)
 - [statistics functions](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/stats)
 - [encryption at rest](vfs/adiantum/README.md)
 - [many extensions](ext/README.md)
- [custom VFSes](vfs/README.md#custom-vfses)
 - [and more…](embed/README.md)

 ### Caveats
@@ -65,31 +71,52 @@ db.QueryRow(`SELECT sqlite_version()`).Scan(&version)
 This module replaces the SQLite [OS Interface](https://sqlite.org/vfs.html)
 (aka VFS) with a [pure Go](vfs/) implementation,
 which has advantages and disadvantages.
-
 Read more about the Go VFS design [here](vfs/README.md).

+Because each database connection executes within a Wasm sandboxed environment,
+memory usage will be higher than alternatives.
+
 ### Testing

 This project aims for [high test coverage](https://github.com/ncruces/go-sqlite3/wiki/Test-coverage-report).
 It also benefits greatly from [SQLite's](https://sqlite.org/testing.html) and
-[wazero's](https://tetrate.io/blog/introducing-wazero-from-tetrate/#:~:text=Rock%2Dsolid%20test%20approach) thorough testing.
+[wazero's](https://tetrate.io/blog/introducing-wazero-from-tetrate/#:~:text=Rock%2Dsolid%20test%20approach)
+thorough testing.

-Every commit is [tested](https://github.com/ncruces/go-sqlite3/wiki/Support-matrix) on
-Linux (amd64/arm64/386/riscv64/ppc64le/s390x), macOS (amd64/arm64),
-Windows (amd64), FreeBSD (amd64/arm64), OpenBSD (amd64), NetBSD (amd64/arm64),
-DragonFly BSD (amd64), illumos (amd64), and Solaris (amd64).
+Every commit is tested on:
+* Linux: amd64, arm64, 386, riscv64, ppc64le, s390x
+* macOS: amd64, arm64
+* Windows: amd64, arm64
+* BSD:
+  * FreeBSD: amd64, arm64
+  * NetBSD: amd64, arm64
+  * DragonFly BSD: amd64
+  * OpenBSD: amd64
+* illumos: amd64
+* Solaris: amd64
+
+Certain operating system and CPU combinations have some limitations. See the [support matrix](https://github.com/ncruces/go-sqlite3/wiki/Support-matrix) for a complete overview.

 The Go VFS is tested by running SQLite's
 [mptest](https://github.com/sqlite/sqlite/blob/master/mptest/mptest.c).

 ### Performance

-Perfomance of the [`database/sql`](https://pkg.go.dev/database/sql) driver is
+Performance of the [`database/sql`](https://pkg.go.dev/database/sql) driver is
 [competitive](https://github.com/cvilsmeier/go-sqlite-bench) with alternatives.

-The Wasm and VFS layers are also tested by running SQLite's
+The Wasm and VFS layers are also benchmarked by running SQLite's
 [speedtest1](https://github.com/sqlite/sqlite/blob/master/test/speedtest1.c).

+### Concurrency
+
+This module behaves similarly to SQLite in [multi-thread](https://sqlite.org/threadsafe.html) mode:
+it is goroutine-safe, provided that no single database connection, or object derived from it,
+is used concurrently by multiple goroutines.
+
+The [`database/sql`](https://pkg.go.dev/database/sql) API is safe to use concurrently,
+according to its documentation.
+
 ### FAQ, issues, new features

 For questions, please see [Discussions](https://github.com/ncruces/go-sqlite3/discussions/categories/q-a).
@@ -106,4 +133,4 @@ and features we're working on, planning to work on, or asking for help with.
 - [`modernc.org/sqlite`](https://pkg.go.dev/modernc.org/sqlite)
 - [`crawshaw.io/sqlite`](https://pkg.go.dev/crawshaw.io/sqlite)
 - [`github.com/mattn/go-sqlite3`](https://pkg.go.dev/github.com/mattn/go-sqlite3)
- [`github.com/zombiezen/go-sqlite`](https://pkg.go.dev/github.com/zombiezen/go-sqlite)
+- [`github.com/zombiezen/go-sqlite`](https://pkg.go.dev/github.com/zombiezen/go-sqlite)
--- a/blob.go
+++ b/blob.go
@@ -31,6 +31,10 @@ var _ io.ReadWriteSeeker = &Blob{}
 //
 // https://sqlite.org/c3ref/blob_open.html
 func (c *Conn) OpenBlob(db, table, column string, row int64, write bool) (*Blob, error) {
+	if c.interrupt.Err() != nil {
+		return nil, INTERRUPT
+	}
+
 	defer c.arena.mark()()
 	blobPtr := c.arena.new(ptrlen)
 	dbPtr := c.arena.string(db)
@@ -42,7 +46,6 @@ func (c *Conn) OpenBlob(db, table, column string, row int64, write bool) (*Blob,
 		flags = 1
 	}

-	c.checkInterrupt(c.handle)
 	rc := res_t(c.call("sqlite3_blob_open", stk_t(c.handle),
 		stk_t(dbPtr), stk_t(tablePtr), stk_t(columnPtr),
 		stk_t(row), stk_t(flags), stk_t(blobPtr)))
@@ -253,7 +256,9 @@ func (b *Blob) Seek(offset int64, whence int) (int64, error) {
 //
 // https://sqlite.org/c3ref/blob_reopen.html
 func (b *Blob) Reopen(row int64) error {
-	b.c.checkInterrupt(b.c.handle)
+	if b.c.interrupt.Err() != nil {
+		return INTERRUPT
+	}
 	err := b.c.error(res_t(b.c.call("sqlite3_blob_reopen", stk_t(b.handle), stk_t(row))))
 	b.bytes = int64(int32(b.c.call("sqlite3_blob_bytes", stk_t(b.handle))))
 	b.offset = 0
--- a/config.go
+++ b/config.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"strconv"
+	"sync/atomic"

 	"github.com/tetratelabs/wazero/api"

@@ -48,6 +49,15 @@ func (c *Conn) Config(op DBConfig, arg ...bool) (bool, error) {
 	return util.ReadBool(c.mod, argsPtr), c.error(rc)
 }

+var defaultLogger atomic.Pointer[func(code ExtendedErrorCode, msg string)]
+
+// ConfigLog sets up the default error logging callback for new connections.
+//
+// https://sqlite.org/errlog.html
+func ConfigLog(cb func(code ExtendedErrorCode, msg string)) {
+	defaultLogger.Store(&cb)
+}
+
 // ConfigLog sets up the error logging callback for the connection.
 //
 // https://sqlite.org/errlog.html
@@ -99,7 +109,7 @@ func (c *Conn) FileControl(schema string, op FcntlOpcode, arg ...any) (any, erro
 	default:
 		return nil, MISUSE

-	case FCNTL_RESET_CACHE:
+	case FCNTL_RESET_CACHE, FCNTL_NULL_IO:
 		rc = res_t(c.call("sqlite3_file_control",
 			stk_t(c.handle), stk_t(schemaPtr),
 			stk_t(op), 0))
@@ -255,7 +265,7 @@ func traceCallback(ctx context.Context, mod api.Module, evt TraceEvent, pDB, pAr
 			}
 		}
 		if arg1 != nil {
-			_, rc = errorCode(c.trace(evt, arg1, arg2), ERROR)
+			_ = c.trace(evt, arg1, arg2)
 		}
 	}
 	return rc
@@ -265,6 +275,10 @@ func traceCallback(ctx context.Context, mod api.Module, evt TraceEvent, pDB, pAr
 //
 // https://sqlite.org/c3ref/wal_checkpoint_v2.html
 func (c *Conn) WALCheckpoint(schema string, mode CheckpointMode) (nLog, nCkpt int, err error) {
+	if c.interrupt.Err() != nil {
+		return 0, 0, INTERRUPT
+	}
+
 	defer c.arena.mark()()
 	nLogPtr := c.arena.new(ptrlen)
 	nCkptPtr := c.arena.new(ptrlen)
@@ -378,6 +392,6 @@ func (c *Conn) EnableChecksums(schema string) error {
 	}

 	// Checkpoint the WAL.
-	_, _, err = c.WALCheckpoint(schema, CHECKPOINT_RESTART)
+	_, _, err = c.WALCheckpoint(schema, CHECKPOINT_FULL)
 	return err
 }
--- a/conn.go
+++ b/conn.go
@@ -25,7 +25,6 @@ type Conn struct {
 	*sqlite

 	interrupt  context.Context
-	pending    *Stmt
 	stmts      []*Stmt
 	busy       func(context.Context, int) bool
 	log        func(xErrorCode, string)
@@ -41,6 +40,7 @@ type Conn struct {
 	busylst time.Time
 	arena   arena
 	handle  ptr_t
+	gosched uint8
 }

 // Open calls [OpenFlags] with [OPEN_READWRITE], [OPEN_CREATE] and [OPEN_URI].
@@ -49,7 +49,7 @@ func Open(filename string) (*Conn, error) {
 }

 // OpenContext is like [Open] but includes a context,
-// which is used to interrupt the process of opening the connectiton.
+// which is used to interrupt the process of opening the connection.
 func OpenContext(ctx context.Context, filename string) (*Conn, error) {
 	return newConn(ctx, filename, OPEN_READWRITE|OPEN_CREATE|OPEN_URI)
 }
@@ -92,6 +92,9 @@ func newConn(ctx context.Context, filename string, flags OpenFlag) (ret *Conn, _
 	}()

 	c.ctx = context.WithValue(c.ctx, connKey{}, c)
+	if logger := defaultLogger.Load(); logger != nil {
+		c.ConfigLog(*logger)
+	}
 	c.arena = c.newArena()
 	c.handle, err = c.openDB(filename, flags)
 	if err == nil {
@@ -117,7 +120,7 @@ func (c *Conn) openDB(filename string, flags OpenFlag) (ptr_t, error) {
 		return 0, err
 	}

-	c.call("sqlite3_progress_handler_go", stk_t(handle), 100)
+	c.call("sqlite3_progress_handler_go", stk_t(handle), 1000)
 	if flags|OPEN_URI != 0 && strings.HasPrefix(filename, "file:") {
 		var pragmas strings.Builder
 		if _, after, ok := strings.Cut(filename, "?"); ok {
@@ -129,7 +132,6 @@ func (c *Conn) openDB(filename string, flags OpenFlag) (ptr_t, error) {
 			}
 		}
 		if pragmas.Len() != 0 {
-			c.checkInterrupt(handle)
 			pragmaPtr := c.arena.string(pragmas.String())
 			rc := res_t(c.call("sqlite3_exec", stk_t(handle), stk_t(pragmaPtr), 0, 0, 0))
 			if err := c.sqlite.error(rc, handle, pragmas.String()); err != nil {
@@ -163,9 +165,6 @@ func (c *Conn) Close() error {
 		return nil
 	}

-	c.pending.Close()
-	c.pending = nil
-
 	rc := res_t(c.call("sqlite3_close", stk_t(c.handle)))
 	if err := c.error(rc); err != nil {
 		return err
@@ -180,11 +179,16 @@ func (c *Conn) Close() error {
 //
 // https://sqlite.org/c3ref/exec.html
 func (c *Conn) Exec(sql string) error {
-	defer c.arena.mark()()
-	sqlPtr := c.arena.string(sql)
+	if c.interrupt.Err() != nil {
+		return INTERRUPT
+	}
+	return c.exec(sql)
+}

-	c.checkInterrupt(c.handle)
-	rc := res_t(c.call("sqlite3_exec", stk_t(c.handle), stk_t(sqlPtr), 0, 0, 0))
+func (c *Conn) exec(sql string) error {
+	defer c.arena.mark()()
+	textPtr := c.arena.string(sql)
+	rc := res_t(c.call("sqlite3_exec", stk_t(c.handle), stk_t(textPtr), 0, 0, 0))
 	return c.error(rc, sql)
 }

@@ -203,20 +207,22 @@ func (c *Conn) PrepareFlags(sql string, flags PrepareFlag) (stmt *Stmt, tail str
 	if len(sql) > _MAX_SQL_LENGTH {
 		return nil, "", TOOBIG
 	}
+	if c.interrupt.Err() != nil {
+		return nil, "", INTERRUPT
+	}

 	defer c.arena.mark()()
 	stmtPtr := c.arena.new(ptrlen)
 	tailPtr := c.arena.new(ptrlen)
-	sqlPtr := c.arena.string(sql)
+	textPtr := c.arena.string(sql)

-	c.checkInterrupt(c.handle)
 	rc := res_t(c.call("sqlite3_prepare_v3", stk_t(c.handle),
-		stk_t(sqlPtr), stk_t(len(sql)+1), stk_t(flags),
+		stk_t(textPtr), stk_t(len(sql)+1), stk_t(flags),
 		stk_t(stmtPtr), stk_t(tailPtr)))

-	stmt = &Stmt{c: c}
+	stmt = &Stmt{c: c, sql: sql}
 	stmt.handle = util.Read32[ptr_t](c.mod, stmtPtr)
-	if sql := sql[util.Read32[ptr_t](c.mod, tailPtr)-sqlPtr:]; sql != "" {
+	if sql := sql[util.Read32[ptr_t](c.mod, tailPtr)-textPtr:]; sql != "" {
 		tail = sql
 	}

@@ -337,43 +343,17 @@ func (c *Conn) GetInterrupt() context.Context {
 //
 // https://sqlite.org/c3ref/interrupt.html
 func (c *Conn) SetInterrupt(ctx context.Context) (old context.Context) {
+	if ctx == nil {
+		panic("nil Context")
+	}
 	old = c.interrupt
 	c.interrupt = ctx
-
-	if ctx == old || ctx.Done() == old.Done() {
-		return old
-	}
-
-	// A busy SQL statement prevents SQLite from ignoring an interrupt
-	// that comes before any other statements are started.
-	if c.pending == nil {
-		defer c.arena.mark()()
-		stmtPtr := c.arena.new(ptrlen)
-		loopPtr := c.arena.string(`WITH RECURSIVE c(x) AS (VALUES(0) UNION ALL SELECT x FROM c) SELECT x FROM c`)
-		c.call("sqlite3_prepare_v3", stk_t(c.handle), stk_t(loopPtr), math.MaxUint64,
-			stk_t(PREPARE_PERSISTENT), stk_t(stmtPtr), 0)
-		c.pending = &Stmt{c: c}
-		c.pending.handle = util.Read32[ptr_t](c.mod, stmtPtr)
-	}
-
-	if old.Done() != nil && ctx.Err() == nil {
-		c.pending.Reset()
-	}
-	if ctx.Done() != nil {
-		c.pending.Step()
-	}
 	return old
 }

-func (c *Conn) checkInterrupt(handle ptr_t) {
-	if c.interrupt.Err() != nil {
-		c.call("sqlite3_interrupt", stk_t(handle))
-	}
-}
-
 func progressCallback(ctx context.Context, mod api.Module, _ ptr_t) (interrupt int32) {
 	if c, ok := ctx.Value(connKey{}).(*Conn); ok {
-		if c.interrupt.Done() != nil {
+		if c.gosched++; c.gosched%16 == 0 {
 			runtime.Gosched()
 		}
 		if c.interrupt.Err() != nil {
@@ -429,11 +409,8 @@ func (c *Conn) BusyHandler(cb func(ctx context.Context, count int) (retry bool))

 func busyCallback(ctx context.Context, mod api.Module, pDB ptr_t, count int32) (retry int32) {
 	if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.busy != nil {
-		interrupt := c.interrupt
-		if interrupt == nil {
-			interrupt = context.Background()
-		}
-		if interrupt.Err() == nil && c.busy(interrupt, int(count)) {
+		if interrupt := c.interrupt; interrupt.Err() == nil &&
+			c.busy(interrupt, int(count)) {
 			retry = 1
 		}
 	}
@@ -443,21 +420,21 @@ func busyCallback(ctx context.Context, mod api.Module, pDB ptr_t, count int32) (
 // Status retrieves runtime status information about a database connection.
 //
 // https://sqlite.org/c3ref/db_status.html
-func (c *Conn) Status(op DBStatus, reset bool) (current, highwater int, err error) {
+func (c *Conn) Status(op DBStatus, reset bool) (current, highwater int64, err error) {
 	defer c.arena.mark()()
-	hiPtr := c.arena.new(intlen)
-	curPtr := c.arena.new(intlen)
+	hiPtr := c.arena.new(8)
+	curPtr := c.arena.new(8)

 	var i int32
 	if reset {
 		i = 1
 	}

-	rc := res_t(c.call("sqlite3_db_status", stk_t(c.handle),
+	rc := res_t(c.call("sqlite3_db_status64", stk_t(c.handle),
 		stk_t(op), stk_t(curPtr), stk_t(hiPtr), stk_t(i)))
 	if err = c.error(rc); err == nil {
-		current = int(util.Read32[int32](c.mod, curPtr))
-		highwater = int(util.Read32[int32](c.mod, hiPtr))
+		current = util.Read64[int64](c.mod, curPtr)
+		highwater = util.Read64[int64](c.mod, hiPtr)
 	}
 	return
 }
@@ -467,20 +444,27 @@ func (c *Conn) Status(op DBStatus, reset bool) (current, highwater int, err erro
 // https://sqlite.org/c3ref/table_column_metadata.html
 func (c *Conn) TableColumnMetadata(schema, table, column string) (declType, collSeq string, notNull, primaryKey, autoInc bool, err error) {
 	defer c.arena.mark()()
-
-	var schemaPtr, columnPtr ptr_t
-	declTypePtr := c.arena.new(ptrlen)
-	collSeqPtr := c.arena.new(ptrlen)
-	notNullPtr := c.arena.new(ptrlen)
-	autoIncPtr := c.arena.new(ptrlen)
-	primaryKeyPtr := c.arena.new(ptrlen)
+	var (
+		declTypePtr   ptr_t
+		collSeqPtr    ptr_t
+		notNullPtr    ptr_t
+		primaryKeyPtr ptr_t
+		autoIncPtr    ptr_t
+		columnPtr     ptr_t
+		schemaPtr     ptr_t
+	)
+	if column != "" {
+		declTypePtr = c.arena.new(ptrlen)
+		collSeqPtr = c.arena.new(ptrlen)
+		notNullPtr = c.arena.new(ptrlen)
+		primaryKeyPtr = c.arena.new(ptrlen)
+		autoIncPtr = c.arena.new(ptrlen)
+		columnPtr = c.arena.string(column)
+	}
 	if schema != "" {
 		schemaPtr = c.arena.string(schema)
 	}
 	tablePtr := c.arena.string(table)
-	if column != "" {
-		columnPtr = c.arena.string(column)
-	}

 	rc := res_t(c.call("sqlite3_table_column_metadata", stk_t(c.handle),
 		stk_t(schemaPtr), stk_t(tablePtr), stk_t(columnPtr),
--- a/const.go
+++ b/const.go
@@ -11,10 +11,9 @@ const (
 	_ROW  = 100 /* sqlite3_step() has another row ready */
 	_DONE = 101 /* sqlite3_step() has finished executing */

-	_MAX_NAME         = 1e6 // Self-imposed limit for most NUL terminated strings.
-	_MAX_LENGTH       = 1e9
-	_MAX_SQL_LENGTH   = 1e9
-	_MAX_FUNCTION_ARG = 100
+	_MAX_NAME       = 1e6 // Self-imposed limit for most NUL terminated strings.
+	_MAX_LENGTH     = 1e9
+	_MAX_SQL_LENGTH = 1e9

 	ptrlen = util.PtrLen
 	intlen = util.IntLen
@@ -74,6 +73,9 @@ const (
 	ERROR_MISSING_COLLSEQ   ExtendedErrorCode = xErrorCode(ERROR) | (1 << 8)
 	ERROR_RETRY             ExtendedErrorCode = xErrorCode(ERROR) | (2 << 8)
 	ERROR_SNAPSHOT          ExtendedErrorCode = xErrorCode(ERROR) | (3 << 8)
+	ERROR_RESERVESIZE       ExtendedErrorCode = xErrorCode(ERROR) | (4 << 8)
+	ERROR_KEY               ExtendedErrorCode = xErrorCode(ERROR) | (5 << 8)
+	ERROR_UNABLE            ExtendedErrorCode = xErrorCode(ERROR) | (6 << 8)
 	IOERR_READ              ExtendedErrorCode = xErrorCode(IOERR) | (1 << 8)
 	IOERR_SHORT_READ        ExtendedErrorCode = xErrorCode(IOERR) | (2 << 8)
 	IOERR_WRITE             ExtendedErrorCode = xErrorCode(IOERR) | (3 << 8)
@@ -108,6 +110,8 @@ const (
 	IOERR_DATA              ExtendedErrorCode = xErrorCode(IOERR) | (32 << 8)
 	IOERR_CORRUPTFS         ExtendedErrorCode = xErrorCode(IOERR) | (33 << 8)
 	IOERR_IN_PAGE           ExtendedErrorCode = xErrorCode(IOERR) | (34 << 8)
+	IOERR_BADKEY            ExtendedErrorCode = xErrorCode(IOERR) | (35 << 8)
+	IOERR_CODEC             ExtendedErrorCode = xErrorCode(IOERR) | (36 << 8)
 	LOCKED_SHAREDCACHE      ExtendedErrorCode = xErrorCode(LOCKED) | (1 << 8)
 	LOCKED_VTAB             ExtendedErrorCode = xErrorCode(LOCKED) | (2 << 8)
 	BUSY_RECOVERY           ExtendedErrorCode = xErrorCode(BUSY) | (1 << 8)
@@ -186,12 +190,12 @@ const (
 type FunctionFlag uint32

 const (
-	DETERMINISTIC FunctionFlag = 0x000000800
-	DIRECTONLY    FunctionFlag = 0x000080000
-	INNOCUOUS     FunctionFlag = 0x000200000
-	SELFORDER1    FunctionFlag = 0x002000000
-	// SUBTYPE        FunctionFlag = 0x000100000
-	// RESULT_SUBTYPE FunctionFlag = 0x001000000
+	DETERMINISTIC  FunctionFlag = 0x000000800
+	DIRECTONLY     FunctionFlag = 0x000080000
+	SUBTYPE        FunctionFlag = 0x000100000
+	INNOCUOUS      FunctionFlag = 0x000200000
+	RESULT_SUBTYPE FunctionFlag = 0x001000000
+	SELFORDER1     FunctionFlag = 0x002000000
 )

 // StmtStatus name counter values associated with the [Stmt.Status] method.
@@ -230,7 +234,8 @@ const (
 	DBSTATUS_DEFERRED_FKS        DBStatus = 10
 	DBSTATUS_CACHE_USED_SHARED   DBStatus = 11
 	DBSTATUS_CACHE_SPILL         DBStatus = 12
-	// DBSTATUS_MAX              DBStatus = 12
+	DBSTATUS_TEMPBUF_SPILL       DBStatus = 13
+	// DBSTATUS_MAX              DBStatus = 13
 )

 // DBConfig are the available database connection configuration options.
@@ -281,6 +286,7 @@ const (
 	FCNTL_DATA_VERSION        FcntlOpcode = 35
 	FCNTL_RESERVE_BYTES       FcntlOpcode = 38
 	FCNTL_RESET_CACHE         FcntlOpcode = 42
+	FCNTL_NULL_IO             FcntlOpcode = 43
 )

 // LimitCategory are the available run-time limit categories.
@@ -362,13 +368,14 @@ const (
 // CheckpointMode are all the checkpoint mode values.
 //
 // https://sqlite.org/c3ref/c_checkpoint_full.html
-type CheckpointMode uint32
+type CheckpointMode int32

 const (
-	CHECKPOINT_PASSIVE  CheckpointMode = 0 /* Do as much as possible w/o blocking */
-	CHECKPOINT_FULL     CheckpointMode = 1 /* Wait for writers, then checkpoint */
-	CHECKPOINT_RESTART  CheckpointMode = 2 /* Like FULL but wait for readers */
-	CHECKPOINT_TRUNCATE CheckpointMode = 3 /* Like RESTART but also truncate WAL */
+	CHECKPOINT_NOOP     CheckpointMode = -1 /* Do no work at all */
+	CHECKPOINT_PASSIVE  CheckpointMode = 0  /* Do as much as possible w/o blocking */
+	CHECKPOINT_FULL     CheckpointMode = 1  /* Wait for writers, then checkpoint */
+	CHECKPOINT_RESTART  CheckpointMode = 2  /* Like FULL but wait for readers */
+	CHECKPOINT_TRUNCATE CheckpointMode = 3  /* Like RESTART but also truncate WAL */
 )

 // TxnState are the allowed return values from [Conn.TxnState].
--- a/context.go
+++ b/context.go
@@ -1,7 +1,6 @@
 package sqlite3

 import (
-	"encoding/json"
 	"errors"
 	"math"
 	"time"
@@ -89,20 +88,26 @@ func (ctx Context) ResultText(value string) {
 }

 // ResultRawText sets the text result of the function to a []byte.
-// Returning a nil slice is the same as calling [Context.ResultNull].
 //
 // https://sqlite.org/c3ref/result_blob.html
 func (ctx Context) ResultRawText(value []byte) {
+	if len(value) == 0 {
+		ctx.ResultText("")
+		return
+	}
 	ptr := ctx.c.newBytes(value)
 	ctx.c.call("sqlite3_result_text_go",
 		stk_t(ctx.handle), stk_t(ptr), stk_t(len(value)))
 }

 // ResultBlob sets the result of the function to a []byte.
-// Returning a nil slice is the same as calling [Context.ResultNull].
 //
 // https://sqlite.org/c3ref/result_blob.html
 func (ctx Context) ResultBlob(value []byte) {
+	if len(value) == 0 {
+		ctx.ResultZeroBlob(0)
+		return
+	}
 	ptr := ctx.c.newBytes(value)
 	ctx.c.call("sqlite3_result_blob_go",
 		stk_t(ctx.handle), stk_t(ptr), stk_t(len(value)))
@@ -167,18 +172,6 @@ func (ctx Context) ResultPointer(ptr any) {
 		stk_t(ctx.handle), stk_t(valPtr))
 }

-// ResultJSON sets the result of the function to the JSON encoding of value.
-//
-// https://sqlite.org/c3ref/result_blob.html
-func (ctx Context) ResultJSON(value any) {
-	data, err := json.Marshal(value)
-	if err != nil {
-		ctx.ResultError(err)
-		return // notest
-	}
-	ctx.ResultRawText(data)
-}
-
 // ResultValue sets the result of the function to a copy of [Value].
 //
 // https://sqlite.org/c3ref/result_blob.html
@@ -205,19 +198,27 @@ func (ctx Context) ResultError(err error) {
 		return
 	}

-	msg, code := errorCode(err, _OK)
+	msg, code := errorCode(err, ERROR)
 	if msg != "" {
 		defer ctx.c.arena.mark()()
 		ptr := ctx.c.arena.string(msg)
 		ctx.c.call("sqlite3_result_error",
 			stk_t(ctx.handle), stk_t(ptr), stk_t(len(msg)))
 	}
-	if code != _OK {
+	if code != res_t(ERROR) {
 		ctx.c.call("sqlite3_result_error_code",
 			stk_t(ctx.handle), stk_t(code))
 	}
 }

+// ResultSubtype sets the subtype of the result of the function.
+//
+// https://sqlite.org/c3ref/result_subtype.html
+func (ctx Context) ResultSubtype(t uint) {
+	ctx.c.call("sqlite3_result_subtype",
+		stk_t(ctx.handle), stk_t(uint32(t)))
+}
+
 // VTabNoChange may return true if a column is being fetched as part
 // of an update during which the column value will not change.
 //
--- a/driver/driver.go
+++ b/driver/driver.go
@@ -20,22 +20,45 @@
 //   - a [serializable] transaction is always "immediate";
 //   - a [read-only] transaction is always "deferred".
 //
+// # Datatypes In SQLite
+//
+// SQLite is dynamically typed.
+// Columns can mostly hold any value regardless of their declared type.
+// SQLite supports most [driver.Value] types out of the box,
+// but bool and [time.Time] require special care.
+//
+// Booleans can be stored on any column type and scanned back to a *bool.
+// However, if scanned to a *any, booleans may either become an
+// int64, string or bool, depending on the declared type of the column.
+// If you use BOOLEAN for your column type,
+// 1 and 0 will always scan as true and false.
+//
 // # Working with time
 //
+// Time values can similarly be stored on any column type.
 // The time encoding/decoding format can be specified using "_timefmt":
 //
 //	sql.Open("sqlite3", "file:demo.db?_timefmt=sqlite")
 //
-// Possible values are: "auto" (the default), "sqlite", "rfc3339";
+// Special values are: "auto" (the default), "sqlite", "rfc3339";
 //   - "auto" encodes as RFC 3339 and decodes any [format] supported by SQLite;
 //   - "sqlite" encodes as SQLite and decodes any [format] supported by SQLite;
 //   - "rfc3339" encodes and decodes RFC 3339 only.
 //
-// If you encode as RFC 3339 (the default),
-// consider using the TIME [collating sequence] to produce a time-ordered sequence.
+// You can also set "_timefmt" to an arbitrary [sqlite3.TimeFormat] or [time.Layout].
 //
-// To scan values in other formats, [sqlite3.TimeFormat.Scanner] may be helpful.
-// To bind values in other formats, [sqlite3.TimeFormat.Encode] them before binding.
+// If you encode as RFC 3339 (the default),
+// consider using the TIME [collating sequence] to produce time-ordered sequences.
+//
+// If you encode as RFC 3339 (the default),
+// time values will scan back to a *time.Time unless your column type is TEXT.
+// Otherwise, if scanned to a *any, time values may either become an
+// int64, float64 or string, depending on the time format and declared type of the column.
+// If you use DATE, TIME, DATETIME, or TIMESTAMP for your column type,
+// "_timefmt" will be used to decode values.
+//
+// To scan values in custom formats, [sqlite3.TimeFormat.Scanner] may be helpful.
+// To bind values in custom formats, [sqlite3.TimeFormat.Encode] them before binding.
 //
 // When using a custom time struct, you'll have to implement
 // [database/sql/driver.Valuer] and [database/sql.Scanner].
@@ -48,7 +71,7 @@
 // The Scan method needs to take into account that the value it receives can be of differing types.
 // It can already be a [time.Time], if the driver decoded the value according to "_timefmt" rules.
 // Or it can be a: string, int64, float64, []byte, or nil,
-// depending on the column type and what whoever wrote the value.
+// depending on the column type and whoever wrote the value.
 // [sqlite3.TimeFormat.Decode] may help.
 //
 // # Setting PRAGMAs
@@ -218,8 +241,9 @@ func (n *connector) Connect(ctx context.Context) (ret driver.Conn, err error) {
 		}
 	}()

-	old := c.Conn.SetInterrupt(ctx)
-	defer c.Conn.SetInterrupt(old)
+	if old := c.Conn.SetInterrupt(ctx); old != ctx {
+		defer c.Conn.SetInterrupt(old)
+	}

 	if !n.pragmas {
 		err = c.Conn.BusyTimeout(time.Minute)
@@ -339,8 +363,9 @@ func (c *conn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, e
 		c.txReset = `; PRAGMA query_only=` + string(c.readOnly)
 	}

-	old := c.Conn.SetInterrupt(ctx)
-	defer c.Conn.SetInterrupt(old)
+	if old := c.Conn.SetInterrupt(ctx); old != ctx {
+		defer c.Conn.SetInterrupt(old)
+	}

 	err := c.Conn.Exec(txBegin)
 	if err != nil {
@@ -358,13 +383,12 @@ func (c *conn) Commit() error {
 }

 func (c *conn) Rollback() error {
-	err := c.Conn.Exec(`ROLLBACK` + c.txReset)
-	if errors.Is(err, sqlite3.INTERRUPT) {
-		old := c.Conn.SetInterrupt(context.Background())
+	// ROLLBACK even if interrupted.
+	ctx := context.Background()
+	if old := c.Conn.SetInterrupt(ctx); old != ctx {
 		defer c.Conn.SetInterrupt(old)
-		err = c.Conn.Exec(`ROLLBACK` + c.txReset)
 	}
-	return err
+	return c.Conn.Exec(`ROLLBACK` + c.txReset)
 }

 func (c *conn) Prepare(query string) (driver.Stmt, error) {
@@ -373,8 +397,9 @@ func (c *conn) Prepare(query string) (driver.Stmt, error) {
 }

 func (c *conn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
-	old := c.Conn.SetInterrupt(ctx)
-	defer c.Conn.SetInterrupt(old)
+	if old := c.Conn.SetInterrupt(ctx); old != ctx {
+		defer c.Conn.SetInterrupt(old)
+	}

 	s, tail, err := c.Conn.Prepare(query)
 	if err != nil {
@@ -399,8 +424,9 @@ func (c *conn) ExecContext(ctx context.Context, query string, args []driver.Name
 		return resultRowsAffected(0), nil
 	}

-	old := c.Conn.SetInterrupt(ctx)
-	defer c.Conn.SetInterrupt(old)
+	if old := c.Conn.SetInterrupt(ctx); old != ctx {
+		defer c.Conn.SetInterrupt(old)
+	}

 	err := c.Conn.Exec(query)
 	if err != nil {
@@ -416,6 +442,22 @@ func (c *conn) CheckNamedValue(arg *driver.NamedValue) error {
 	return nil
 }

+// Deprecated: for Litestream use only; may be removed at any time.
+func (c *conn) FileControlPersistWAL(schema string, mode int) (int, error) {
+	// notest
+	arg := make([]any, 1)
+	if mode >= 0 {
+		arg[0] = mode > 0
+	} else {
+		arg = arg[:0]
+	}
+	res, err := c.Conn.FileControl(schema, sqlite3.FCNTL_PERSIST_WAL, arg...)
+	if res == true {
+		return 1, err
+	}
+	return 0, err
+}
+
 type stmt struct {
 	*sqlite3.Stmt
 	tmWrite sqlite3.TimeFormat
@@ -463,8 +505,10 @@ func (s *stmt) ExecContext(ctx context.Context, args []driver.NamedValue) (drive
 		return nil, err
 	}

-	old := s.Stmt.Conn().SetInterrupt(ctx)
-	defer s.Stmt.Conn().SetInterrupt(old)
+	c := s.Stmt.Conn()
+	if old := c.SetInterrupt(ctx); old != ctx {
+		defer c.SetInterrupt(old)
+	}

 	err = errors.Join(
 		s.Stmt.Exec(),
@@ -473,7 +517,7 @@ func (s *stmt) ExecContext(ctx context.Context, args []driver.NamedValue) (drive
 		return nil, err
 	}

-	return newResult(s.Stmt.Conn()), nil
+	return newResult(c), nil
 }

 func (s *stmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
@@ -518,8 +562,8 @@ func (s *stmt) setupBindings(args []driver.NamedValue) (err error) {
 				err = s.Stmt.BindTime(id, a, s.tmWrite)
 			case util.JSON:
 				err = s.Stmt.BindJSON(id, a.Value)
-			case util.PointerUnwrap:
-				err = s.Stmt.BindPointer(id, util.UnwrapPointer(a))
+			case util.Pointer:
+				err = s.Stmt.BindPointer(id, a.Value)
 			case nil:
 				err = s.Stmt.BindNull(id)
 			default:
@@ -537,7 +581,7 @@ func (s *stmt) CheckNamedValue(arg *driver.NamedValue) error {
 	switch arg.Value.(type) {
 	case bool, int, int64, float64, string, []byte,
 		time.Time, sqlite3.ZeroBlob,
-		util.JSON, util.PointerUnwrap,
+		util.JSON, util.Pointer,
 		nil:
 		return nil
 	default:
@@ -576,32 +620,65 @@ func (r resultRowsAffected) RowsAffected() (int64, error) {
 	return int64(r), nil
 }

+type scantype byte
+
+const (
+	_ANY scantype = iota
+	_INT
+	_REAL
+	_TEXT
+	_BLOB
+	_NULL
+	_BOOL
+	_TIME
+	_NOT_NULL
+)
+
+var (
+	_ [0]struct{} = [scantype(sqlite3.INTEGER) - _INT]struct{}{}
+	_ [0]struct{} = [scantype(sqlite3.FLOAT) - _REAL]struct{}{}
+	_ [0]struct{} = [scantype(sqlite3.TEXT) - _TEXT]struct{}{}
+	_ [0]struct{} = [scantype(sqlite3.BLOB) - _BLOB]struct{}{}
+	_ [0]struct{} = [scantype(sqlite3.NULL) - _NULL]struct{}{}
+	_ [0]struct{} = [_NOT_NULL & (_NOT_NULL - 1)]struct{}{}
+)
+
+func scanFromDecl(decl string) scantype {
+	// These types are only used before we have rows,
+	// and otherwise as type hints.
+	// The first few ensure STRICT tables are strictly typed.
+	// The other two are type hints for booleans and time.
+	switch decl {
+	case "INT", "INTEGER":
+		return _INT
+	case "REAL":
+		return _REAL
+	case "TEXT":
+		return _TEXT
+	case "BLOB":
+		return _BLOB
+	case "BOOLEAN":
+		return _BOOL
+	case "DATE", "TIME", "DATETIME", "TIMESTAMP":
+		return _TIME
+	}
+	return _ANY
+}
+
 type rows struct {
 	ctx context.Context
 	*stmt
 	names []string
 	types []string
-	nulls []bool
 	scans []scantype
+	dest  []driver.Value
 }

-type scantype byte
-
-const (
-	_ANY  scantype = iota
-	_INT  scantype = scantype(sqlite3.INTEGER)
-	_REAL scantype = scantype(sqlite3.FLOAT)
-	_TEXT scantype = scantype(sqlite3.TEXT)
-	_BLOB scantype = scantype(sqlite3.BLOB)
-	_NULL scantype = scantype(sqlite3.NULL)
-	_BOOL scantype = iota
-	_TIME
-)
-
 var (
 	// Ensure these interfaces are implemented:
 	_ driver.RowsColumnTypeDatabaseTypeName = &rows{}
 	_ driver.RowsColumnTypeNullable         = &rows{}
+	// _ driver.RowsColumnScanner           = &rows{}
 )

 func (r *rows) Close() error {
@@ -622,79 +699,63 @@ func (r *rows) Columns() []string {
 	return r.names
 }

+func (r *rows) scanType(index int) scantype {
+	if r.scans == nil {
+		count := len(r.names)
+		scans := make([]scantype, count)
+		for i := range scans {
+			scans[i] = scanFromDecl(strings.ToUpper(r.Stmt.ColumnDeclType(i)))
+		}
+		r.scans = scans
+	}
+	return r.scans[index] &^ _NOT_NULL
+}
+
 func (r *rows) loadColumnMetadata() {
-	if r.nulls == nil {
-		count := r.Stmt.ColumnCount()
-		nulls := make([]bool, count)
+	if r.types == nil {
+		c := r.Stmt.Conn()
+		count := len(r.names)
 		types := make([]string, count)
 		scans := make([]scantype, count)
-		for i := range nulls {
+		for i := range types {
+			var notnull bool
 			if col := r.Stmt.ColumnOriginName(i); col != "" {
-				types[i], _, nulls[i], _, _, _ = r.Stmt.Conn().TableColumnMetadata(
+				types[i], _, notnull, _, _, _ = c.TableColumnMetadata(
 					r.Stmt.ColumnDatabaseName(i),
 					r.Stmt.ColumnTableName(i),
 					col)
 				types[i] = strings.ToUpper(types[i])
-				// These types are only used before we have rows,
-				// and otherwise as type hints.
-				// The first few ensure STRICT tables are strictly typed.
-				// The other two are type hints for booleans and time.
-				switch types[i] {
-				case "INT", "INTEGER":
-					scans[i] = _INT
-				case "REAL":
-					scans[i] = _REAL
-				case "TEXT":
-					scans[i] = _TEXT
-				case "BLOB":
-					scans[i] = _BLOB
-				case "BOOLEAN":
-					scans[i] = _BOOL
-				case "DATE", "TIME", "DATETIME", "TIMESTAMP":
-					scans[i] = _TIME
+				scans[i] = scanFromDecl(types[i])
+				if notnull {
+					scans[i] |= _NOT_NULL
 				}
 			}
 		}
-		r.nulls = nulls
 		r.types = types
 		r.scans = scans
 	}
 }

-func (r *rows) declType(index int) string {
-	if r.types == nil {
-		count := r.Stmt.ColumnCount()
-		types := make([]string, count)
-		for i := range types {
-			types[i] = strings.ToUpper(r.Stmt.ColumnDeclType(i))
-		}
-		r.types = types
-	}
-	return r.types[index]
-}
-
 func (r *rows) ColumnTypeDatabaseTypeName(index int) string {
 	r.loadColumnMetadata()
-	decltype := r.types[index]
-	if len := len(decltype); len > 0 && decltype[len-1] == ')' {
-		if i := strings.LastIndexByte(decltype, '('); i >= 0 {
-			decltype = decltype[:i]
+	decl := r.types[index]
+	if len := len(decl); len > 0 && decl[len-1] == ')' {
+		if i := strings.LastIndexByte(decl, '('); i >= 0 {
+			decl = decl[:i]
 		}
 	}
-	return strings.TrimSpace(decltype)
+	return strings.TrimSpace(decl)
 }

 func (r *rows) ColumnTypeNullable(index int) (nullable, ok bool) {
 	r.loadColumnMetadata()
-	if r.nulls[index] {
-		return false, true
-	}
-	return true, false
+	nullable = r.scans[index]&^_NOT_NULL == 0
+	return nullable, !nullable
 }

 func (r *rows) ColumnTypeScanType(index int) (typ reflect.Type) {
 	r.loadColumnMetadata()
-	scan := r.scans[index]
+	scan := r.scans[index] &^ _NOT_NULL

 	if r.Stmt.Busy() {
 		// SQLite is dynamically typed and we now have a row.
@@ -706,7 +767,7 @@ func (r *rows) ColumnTypeScanType(index int) (typ reflect.Type) {
 		switch {
 		case scan == _TIME && val != _BLOB && val != _NULL:
 			t := r.Stmt.ColumnTime(index, r.tmRead)
-			useValType = t == time.Time{}
+			useValType = t.IsZero()
 		case scan == _BOOL && val == _INT:
 			i := r.Stmt.ColumnInt64(index)
 			useValType = i != 0 && i != 1
@@ -737,8 +798,11 @@ func (r *rows) ColumnTypeScanType(index int) (typ reflect.Type) {
 }

 func (r *rows) Next(dest []driver.Value) error {
-	old := r.Stmt.Conn().SetInterrupt(r.ctx)
-	defer r.Stmt.Conn().SetInterrupt(old)
+	r.dest = nil
+	c := r.Stmt.Conn()
+	if old := c.SetInterrupt(r.ctx); old != r.ctx {
+		defer c.SetInterrupt(old)
+	}

 	if !r.Stmt.Step() {
 		if err := r.Stmt.Err(); err != nil {
@@ -748,36 +812,69 @@ func (r *rows) Next(dest []driver.Value) error {
 	}

 	data := unsafe.Slice((*any)(unsafe.SliceData(dest)), len(dest))
-	err := r.Stmt.Columns(data...)
+	if err := r.Stmt.ColumnsRaw(data...); err != nil {
+		return err
+	}
 	for i := range dest {
-		if t, ok := r.decodeTime(i, dest[i]); ok {
-			dest[i] = t
+		scan := r.scanType(i)
+		if v, ok := dest[i].([]byte); ok {
+			if len(v) == cap(v) { // a BLOB
+				continue
+			}
+			if scan != _TEXT {
+				switch r.tmWrite {
+				case "", time.RFC3339, time.RFC3339Nano:
+					t, ok := maybeTime(v)
+					if ok {
+						dest[i] = t
+						continue
+					}
+				}
+			}
+			dest[i] = string(v)
+		}
+		switch scan {
+		case _TIME:
+			t, err := r.tmRead.Decode(dest[i])
+			if err == nil {
+				dest[i] = t
+			}
+		case _BOOL:
+			switch dest[i] {
+			case int64(0):
+				dest[i] = false
+			case int64(1):
+				dest[i] = true
+			}
+		}
+	}
+	r.dest = dest
+	return nil
+}
+
+func (r *rows) ScanColumn(dest any, index int) (err error) {
+	// notest // Go 1.26
+	var tm *time.Time
+	var ok *bool
+	switch d := dest.(type) {
+	case *time.Time:
+		tm = d
+	case *sql.NullTime:
+		tm = &d.Time
+		ok = &d.Valid
+	case *sql.Null[time.Time]:
+		tm = &d.V
+		ok = &d.Valid
+	default:
+		return driver.ErrSkip
+	}
+	value := r.dest[index]
+	*tm, err = r.tmRead.Decode(value)
+	if ok != nil {
+		*ok = err == nil
+		if value == nil {
+			return nil
 		}
 	}
 	return err
 }
-
-func (r *rows) decodeTime(i int, v any) (_ time.Time, ok bool) {
-	switch v := v.(type) {
-	case int64, float64:
-		// could be a time value
-	case string:
-		if r.tmWrite != "" && r.tmWrite != time.RFC3339 && r.tmWrite != time.RFC3339Nano {
-			break
-		}
-		t, ok := maybeTime(v)
-		if ok {
-			return t, true
-		}
-	default:
-		return
-	}
-	switch r.declType(i) {
-	case "DATE", "TIME", "DATETIME", "TIMESTAMP":
-		// could be a time value
-	default:
-		return
-	}
-	t, err := r.tmRead.Decode(v)
-	return t, err == nil
-}
--- a/driver/driver_test.go
+++ b/driver/driver_test.go
@@ -8,6 +8,7 @@ import (
 	"math"
 	"net/url"
 	"reflect"
+	"strings"
 	"testing"
 	"time"

@@ -33,7 +34,7 @@ func Test_Open_error(t *testing.T) {
 func Test_Open_dir(t *testing.T) {
 	t.Parallel()

-	db, err := sql.Open("sqlite3", ".")
+	db, err := Open(".")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -43,18 +44,18 @@ func Test_Open_dir(t *testing.T) {
 	if err == nil {
 		t.Fatal("want error")
 	}
-	if !errors.Is(err, sqlite3.CANTOPEN) {
-		t.Errorf("got %v, want sqlite3.CANTOPEN", err)
+	if !errors.Is(err, sqlite3.CANTOPEN_ISDIR) {
+		t.Errorf("got %v, want sqlite3.CANTOPEN_ISDIR", err)
 	}
 }

 func Test_Open_pragma(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t, url.Values{
+	dsn := memdb.TestDB(t, url.Values{
 		"_pragma": {"busy_timeout(1000)"},
 	})

-	db, err := sql.Open("sqlite3", tmp)
+	db, err := Open(dsn)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -72,11 +73,11 @@ func Test_Open_pragma(t *testing.T) {

 func Test_Open_pragma_invalid(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t, url.Values{
+	dsn := memdb.TestDB(t, url.Values{
 		"_pragma": {"busy_timeout 1000"},
 	})

-	db, err := sql.Open("sqlite3", tmp)
+	db, err := Open(dsn)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -100,12 +101,12 @@ func Test_Open_pragma_invalid(t *testing.T) {

 func Test_Open_txLock(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t, url.Values{
+	dsn := memdb.TestDB(t, url.Values{
 		"_txlock": {"exclusive"},
 		"_pragma": {"busy_timeout(1000)"},
 	})

-	db, err := sql.Open("sqlite3", tmp)
+	db, err := Open(dsn)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -136,11 +137,11 @@ func Test_Open_txLock(t *testing.T) {

 func Test_Open_txLock_invalid(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t, url.Values{
+	dsn := memdb.TestDB(t, url.Values{
 		"_txlock": {"xclusive"},
 	})

-	_, err := sql.Open("sqlite3", tmp+"_txlock=xclusive")
+	_, err := Open(dsn)
 	if err == nil {
 		t.Fatal("want error")
 	}
@@ -151,31 +152,28 @@ func Test_Open_txLock_invalid(t *testing.T) {

 func Test_BeginTx(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t, url.Values{
+	dsn := memdb.TestDB(t, url.Values{
 		"_txlock": {"exclusive"},
 		"_pragma": {"busy_timeout(0)"},
 	})

-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-
-	db, err := sql.Open("sqlite3", tmp)
+	db, err := Open(dsn)
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer db.Close()

-	_, err = db.BeginTx(ctx, &sql.TxOptions{Isolation: sql.LevelReadCommitted})
+	_, err = db.BeginTx(t.Context(), &sql.TxOptions{Isolation: sql.LevelReadCommitted})
 	if err.Error() != string(util.IsolationErr) {
 		t.Error("want isolationErr")
 	}

-	tx1, err := db.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
+	tx1, err := db.BeginTx(t.Context(), &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		t.Fatal(err)
 	}

-	tx2, err := db.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
+	tx2, err := db.BeginTx(t.Context(), &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -199,11 +197,69 @@ func Test_BeginTx(t *testing.T) {
 	}
 }

+func Test_nested_context(t *testing.T) {
+	t.Parallel()
+	dsn := memdb.TestDB(t)
+
+	db, err := Open(dsn)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	tx, err := db.Begin()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer tx.Rollback()
+
+	outer, err := tx.Query(`SELECT value FROM generate_series(0)`)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer outer.Close()
+
+	want := func(rows *sql.Rows, want int) {
+		t.Helper()
+
+		var got int
+		rows.Next()
+		if err := rows.Scan(&got); err != nil {
+			t.Fatal(err)
+		}
+		if got != want {
+			t.Errorf("got %d, want %d", got, want)
+		}
+	}
+
+	want(outer, 0)
+
+	ctx, cancel := context.WithCancel(t.Context())
+	defer cancel()
+
+	inner, err := tx.QueryContext(ctx, `SELECT value FROM generate_series(0)`)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer inner.Close()
+
+	want(inner, 0)
+	cancel()
+
+	var terr interface{ Temporary() bool }
+	if inner.Next() || !errors.Is(inner.Err(), context.Canceled) &&
+		(!errors.As(inner.Err(), &terr) || !terr.Temporary()) {
+		t.Fatalf("got %v, want cancellation", inner.Err())
+	}
+
+	want(outer, 1)
+}
+
 func Test_Prepare(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := sql.Open("sqlite3", tmp)
+	db, err := Open(dsn)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -242,24 +298,21 @@ func Test_Prepare(t *testing.T) {

 func Test_QueryRow_named(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-
-	db, err := sql.Open("sqlite3", tmp)
+	db, err := Open(dsn)
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer db.Close()

-	conn, err := db.Conn(ctx)
+	conn, err := db.Conn(t.Context())
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer conn.Close()

-	stmt, err := conn.PrepareContext(ctx, `SELECT ?, ?5, :AAA, @AAA, $AAA`)
+	stmt, err := conn.PrepareContext(t.Context(), `SELECT ?, ?5, :AAA, @AAA, $AAA`)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -295,9 +348,9 @@ func Test_QueryRow_named(t *testing.T) {

 func Test_QueryRow_blob_null(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := sql.Open("sqlite3", tmp)
+	db, err := Open(dsn)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -332,11 +385,11 @@ func Test_time(t *testing.T) {

 	for _, fmt := range []string{"auto", "sqlite", "rfc3339", time.ANSIC} {
 		t.Run(fmt, func(t *testing.T) {
-			tmp := memdb.TestDB(t, url.Values{
+			dsn := memdb.TestDB(t, url.Values{
 				"_timefmt": {fmt},
 			})

-			db, err := sql.Open("sqlite3", tmp)
+			db, err := Open(dsn)
 			if err != nil {
 				t.Fatal(err)
 			}
@@ -379,9 +432,9 @@ func Test_ColumnType_ScanType(t *testing.T) {
 	)

 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := sql.Open("sqlite3", tmp)
+	db, err := Open(dsn)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -467,3 +520,58 @@ func Test_ColumnType_ScanType(t *testing.T) {
 		t.Fatal(err)
 	}
 }
+
+func Test_rows_ScanColumn(t *testing.T) {
+	t.Parallel()
+	dsn := memdb.TestDB(t)
+
+	db, err := Open(dsn)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	var tm time.Time
+	err = db.QueryRow(`SELECT NULL`).Scan(&tm)
+	if err == nil {
+		t.Error("want error")
+	}
+	// Go 1.26
+	err = db.QueryRow(`SELECT datetime()`).Scan(&tm)
+	if err != nil && !strings.HasPrefix(err.Error(), "sql: Scan error") {
+		t.Error(err)
+	}
+
+	var nt sql.NullTime
+	err = db.QueryRow(`SELECT NULL`).Scan(&nt)
+	if err != nil {
+		t.Error(err)
+	}
+	// Go 1.26
+	err = db.QueryRow(`SELECT datetime()`).Scan(&nt)
+	if err != nil && !strings.HasPrefix(err.Error(), "sql: Scan error") {
+		t.Error(err)
+	}
+}
+
+func Benchmark_loop(b *testing.B) {
+	db, err := Open(":memory:")
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer db.Close()
+
+	var version string
+	err = db.QueryRow(`SELECT sqlite_version();`).Scan(&version)
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	for b.Loop() {
+		_, err := db.ExecContext(b.Context(),
+			`WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x < 1000000) SELECT x FROM c;`)
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+}
--- a/driver/example2_test.go
+++ b/driver/example2_test.go
@@ -1,9 +1,5 @@
-//go:build linux || darwin || windows || freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock || sqlite3_dotlk
-
 package driver_test

-// Adapted from: https://go.dev/doc/tutorial/database-access
-
 import (
 	"database/sql"
 	"database/sql/driver"
@@ -27,7 +23,7 @@ func Example_customTime() {
 	_, err = db.Exec(`
 		CREATE TABLE data (
 			id INTEGER PRIMARY KEY,
-			date_time TEXT
+			date_time ANY
 		) STRICT;
 	`)
 	if err != nil {
--- a/driver/time.go
+++ b/driver/time.go
@@ -1,12 +1,15 @@
 package driver

-import "time"
+import (
+	"bytes"
+	"time"
+)

 // Convert a string in [time.RFC3339Nano] format into a [time.Time]
 // if it roundtrips back to the same string.
 // This way times can be persisted to, and recovered from, the database,
 // but if a string is needed, [database/sql] will recover the same string.
-func maybeTime(text string) (_ time.Time, _ bool) {
+func maybeTime(text []byte) (_ time.Time, _ bool) {
 	// Weed out (some) values that can't possibly be
 	// [time.RFC3339Nano] timestamps.
 	if len(text) < len("2006-01-02T15:04:05Z") {
@@ -21,8 +24,8 @@ func maybeTime(text string) (_ time.Time, _ bool) {

 	// Slow path.
 	var buf [len(time.RFC3339Nano)]byte
-	date, err := time.Parse(time.RFC3339Nano, text)
-	if err == nil && text == string(date.AppendFormat(buf[:0], time.RFC3339Nano)) {
+	date, err := time.Parse(time.RFC3339Nano, string(text))
+	if err == nil && bytes.Equal(text, date.AppendFormat(buf[:0], time.RFC3339Nano)) {
 		return date, true
 	}
 	return
--- a/driver/time_test.go
+++ b/driver/time_test.go
@@ -22,7 +22,7 @@ func Fuzz_stringOrTime_1(f *testing.F) {
 	f.Add("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.")

 	f.Fuzz(func(t *testing.T, str string) {
-		v, ok := maybeTime(str)
+		v, ok := maybeTime([]byte(str))
 		if ok {
 			// Make sure times round-trip to the same string:
 			// https://pkg.go.dev/database/sql#Rows.Scan
@@ -51,7 +51,7 @@ func Fuzz_stringOrTime_2(f *testing.F) {
 	f.Add(int64(-763421161058), int64(222_222_222)) // twosday, year 22222BC

 	checkTime := func(t testing.TB, date time.Time) {
-		v, ok := maybeTime(date.Format(time.RFC3339Nano))
+		v, ok := maybeTime(date.AppendFormat(nil, time.RFC3339Nano))
 		if ok {
 			// Make sure times round-trip to the same time:
 			if !v.Equal(date) {
--- a/driver/util_test.go
+++ b/driver/util_test.go
@@ -1,7 +1,6 @@
 package driver

 import (
-	"context"
 	"database/sql/driver"
 	"slices"
 	"testing"
@@ -56,7 +55,7 @@ func Fuzz_notWhitespace(f *testing.F) {
 			t.SkipNow()
 		}

-		c, err := db.Conn(context.Background())
+		c, err := db.Conn(t.Context())
 		if err != nil {
 			t.Fatal(err)
 		}
--- a/embed/README.md
+++ b/embed/README.md
@@ -1,6 +1,6 @@
 # Embeddable Wasm build of SQLite

-This folder includes an embeddable Wasm build of SQLite 3.49.1 for use with
+This folder includes an embeddable Wasm build of SQLite 3.50.4 for use with
 [`github.com/ncruces/go-sqlite3`](https://pkg.go.dev/github.com/ncruces/go-sqlite3).

 The following optional features are compiled in:
--- a/embed/bcw2/bcw2.wasm
+++ b/embed/bcw2/bcw2.wasm
--- a/embed/bcw2/bcw2_test.go
+++ b/embed/bcw2/bcw2_test.go
@@ -53,7 +53,7 @@ func Test_bcw2(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if version != "3.50.0" {
+	if version != "3.51.0" {
 		t.Error(version)
 	}
 }
--- a/embed/bcw2/build.sh
+++ b/embed/bcw2/build.sh
@@ -7,17 +7,18 @@ ROOT=../../
 BINARYEN="$ROOT/tools/binaryen/bin"
 WASI_SDK="$ROOT/tools/wasi-sdk/bin"

-trap 'rm -rf build/ sqlite/ bcw2.tmp' EXIT
+trap 'rm -rf sqlite/ build/ bcw2.tmp' EXIT

+mkdir -p sqlite/
 mkdir -p build/ext/
 cp "$ROOT"/sqlite3/*.[ch] build/
 cp "$ROOT"/sqlite3/*.patch build/
+cd sqlite/

-# https://sqlite.org/src/info/c09656c62155a6e8
-curl -# https://sqlite.org/src/tarball/sqlite.tar.gz?r=c09656c6 | tar xz
+# https://sqlite.org/src/info/0e862bc9ed7aa9ae
+curl -#L https://github.com/sqlite/sqlite/archive/0b99392.tar.gz | tar xz --strip-components=1
+# curl -#L https://sqlite.org/src/tarball/sqlite.tar.gz?r=0e862bc9ed | tar xz --strip-components=1

-cd sqlite
-cat ../repro.patch | patch -p0 --no-backup-if-mismatch
 if [[ "$OSTYPE" == "msys" || "$OSTYPE" == "cygwin" ]]; then
 	MSYS_NO_PATHCONV=1 nmake /f makefile.msc sqlite3.c "OPTS=-DSQLITE_ENABLE_UPDATE_DELETE_LIMIT -DSQLITE_ENABLE_ORDERED_SET_AGGREGATES"
 else
@@ -44,13 +45,14 @@ cd ~-

 "$WASI_SDK/clang" --target=wasm32-wasi -std=c23 -g0 -O2 \
 	-Wall -Wextra -Wno-unused-parameter -Wno-unused-function \
-	-o bcw2.wasm "build/main.c" \
-	-I"build" \
+	-o bcw2.wasm build/main.c \
+	-I"$ROOT/sqlite3/libc" -I"build" \
 	-mexec-model=reactor \
-	-msimd128 -mmutable-globals -mmultivalue \
-	-mbulk-memory -mreference-types \
-	-mnontrapping-fptoint -msign-ext \
-	-fno-stack-protector -fno-stack-clash-protection \
+	-mmutable-globals -mnontrapping-fptoint \
+	-msimd128 -mbulk-memory -msign-ext \
+	-mreference-types -mmultivalue \
+	-mno-extended-const \
+	-fno-stack-protector \
 	-Wl,--stack-first \
 	-Wl,--import-undefined \
 	-Wl,--initial-memory=327680 \
@@ -60,8 +62,9 @@ cd ~-
 	$(awk '{print "-Wl,--export="$0}' ../exports.txt)

 "$BINARYEN/wasm-ctor-eval" -g -c _initialize bcw2.wasm -o bcw2.tmp
-"$BINARYEN/wasm-opt" -g --strip --strip-producers -c -O3 \
-	bcw2.tmp -o bcw2.wasm \
-	--enable-simd --enable-mutable-globals --enable-multivalue \
-	--enable-bulk-memory --enable-reference-types \
-	--enable-nontrapping-float-to-int --enable-sign-ext
+"$BINARYEN/wasm-opt" -g bcw2.tmp -o bcw2.wasm \
+	--low-memory-unused --gufa --generate-global-effects --converge -O3 \
+	--enable-mutable-globals --enable-nontrapping-float-to-int \
+	--enable-simd --enable-bulk-memory --enable-sign-ext \
+	--enable-reference-types --enable-multivalue \
+	--strip --strip-producers
--- a/embed/bcw2/go.mod
+++ b/embed/bcw2/go.mod
@@ -1,14 +1,12 @@
 module github.com/ncruces/go-sqlite3/embed/bcw2

-go 1.23.0
+go 1.24.0

-toolchain go1.24.0
-
-require github.com/ncruces/go-sqlite3 v0.23.1
+require github.com/ncruces/go-sqlite3 v0.30.1

 require (
 	github.com/ncruces/julianday v1.0.0 // indirect
-	github.com/ncruces/sort v0.1.5 // indirect
-	github.com/tetratelabs/wazero v1.9.0 // indirect
-	golang.org/x/sys v0.30.0 // indirect
+	github.com/ncruces/sort v0.1.6 // indirect
+	github.com/tetratelabs/wazero v1.10.0 // indirect
+	golang.org/x/sys v0.38.0 // indirect
 )
--- a/embed/bcw2/go.sum
+++ b/embed/bcw2/go.sum
@@ -1,12 +1,12 @@
-github.com/ncruces/go-sqlite3 v0.23.1 h1:zGAd76q+Tr18z/xKGatUlzBQdjR3J+rexfANUcjAgkY=
-github.com/ncruces/go-sqlite3 v0.23.1/go.mod h1:Xg3FyAZl25HcBSFmcbymdfoTqD7jRnBUmv1jSrbIjdE=
+github.com/ncruces/go-sqlite3 v0.30.1 h1:pHC3YsyRdJv4pCMB4MO1Q2BXw/CAa+Hoj7GSaKtVk+g=
+github.com/ncruces/go-sqlite3 v0.30.1/go.mod h1:UVsWrQaq1qkcal5/vT5lOJnZCVlR5rsThKdwidjFsKc=
 github.com/ncruces/julianday v1.0.0 h1:fH0OKwa7NWvniGQtxdJRxAgkBMolni2BjDHaWTxqt7M=
 github.com/ncruces/julianday v1.0.0/go.mod h1:Dusn2KvZrrovOMJuOt0TNXL6tB7U2E8kvza5fFc9G7g=
-github.com/ncruces/sort v0.1.5 h1:fiFWXXAqKI8QckPf/6hu/bGFwcEPrirIOFaJqWujs4k=
-github.com/ncruces/sort v0.1.5/go.mod h1:obJToO4rYr6VWP0Uw5FYymgYGt3Br4RXcs/JdKaXAPk=
-github.com/tetratelabs/wazero v1.9.0 h1:IcZ56OuxrtaEz8UYNRHBrUa9bYeX9oVY93KspZZBf/I=
-github.com/tetratelabs/wazero v1.9.0/go.mod h1:TSbcXCfFP0L2FGkRPxHphadXPjo1T6W+CseNNY7EkjM=
-golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
-golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
-golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
+github.com/ncruces/sort v0.1.6 h1:TrsJfGRH1AoWoaeB4/+gCohot9+cA6u/INaH5agIhNk=
+github.com/ncruces/sort v0.1.6/go.mod h1:obJToO4rYr6VWP0Uw5FYymgYGt3Br4RXcs/JdKaXAPk=
+github.com/tetratelabs/wazero v1.10.0 h1:CXP3zneLDl6J4Zy8N/J+d5JsWKfrjE6GtvVK1fpnDlk=
+github.com/tetratelabs/wazero v1.10.0/go.mod h1:DRm5twOQ5Gr1AoEdSi0CLjDQF1J9ZAuyqFIjl1KKfQU=
+golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
+golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/text v0.30.0 h1:yznKA/E9zq54KzlzBEAWn1NXSQ8DIp/NYMy88xJjl4k=
+golang.org/x/text v0.30.0/go.mod h1:yDdHFIX9t+tORqspjENWgzaCVXgk0yYnYuSZ8UzzBVM=
--- a/embed/bcw2/repro.patch
+++ b/embed/bcw2/repro.patch
@@ -1,23 +0,0 @@
-# https://sqlite.org/src/vpatch?from=67809715977a5bad&to=3f57584710d61174
--- tool/mkpragmatab.tcl
-+++ tool/mkpragmatab.tcl
-@@ -526,14 +526,17 @@
-   puts $fd [format {#define PragFlg_%-10s 0x%02x /* %s */} \
-              $f $fv $flagMeaning($f)]
-   set fv [expr {$fv*2}]
- }
- 
-# Sort the column lists so that longer column lists occur first
-+# Sort the column lists so that longer column lists occur first.
-+# In the event of a tie, sort column lists lexicographically.
- #
- proc colscmp {a b} {
-  return [expr {[llength $b] - [llength $a]}]
-+  set rc [expr {[llength $b] - [llength $a]}]
-+  if {$rc} {return $rc}
-+  return [string compare $a $b]
- }
- set cols_list [lsort -command colscmp $cols_list]
- 
- # Generate the array of column names used by pragmas that act like
- # queries.
--- a/embed/build.sh
+++ b/embed/build.sh
@@ -12,12 +12,13 @@ trap 'rm -f sqlite3.tmp' EXIT
 "$WASI_SDK/clang" --target=wasm32-wasi -std=c23 -g0 -O2 \
 	-Wall -Wextra -Wno-unused-parameter -Wno-unused-function \
 	-o sqlite3.wasm "$ROOT/sqlite3/main.c" \
-	-I"$ROOT/sqlite3" \
+	-I"$ROOT/sqlite3/libc" -I"$ROOT/sqlite3" \
 	-mexec-model=reactor \
-	-msimd128 -mmutable-globals -mmultivalue \
-	-mbulk-memory -mreference-types \
-	-mnontrapping-fptoint -msign-ext \
-	-fno-stack-protector -fno-stack-clash-protection \
+	-mmutable-globals -mnontrapping-fptoint \
+	-msimd128 -mbulk-memory -msign-ext \
+	-mreference-types -mmultivalue \
+	-mno-extended-const \
+	-fno-stack-protector \
 	-Wl,--stack-first \
 	-Wl,--import-undefined \
 	-Wl,--initial-memory=327680 \
@@ -26,8 +27,9 @@ trap 'rm -f sqlite3.tmp' EXIT
 	$(awk '{print "-Wl,--export="$0}' exports.txt)

 "$BINARYEN/wasm-ctor-eval" -g -c _initialize sqlite3.wasm -o sqlite3.tmp
-"$BINARYEN/wasm-opt" -g --strip --strip-producers -c -O3 \
-	sqlite3.tmp -o sqlite3.wasm \
-	--enable-simd --enable-mutable-globals --enable-multivalue \
-	--enable-bulk-memory --enable-reference-types \
-	--enable-nontrapping-float-to-int --enable-sign-ext
+"$BINARYEN/wasm-opt" -g sqlite3.tmp -o sqlite3.wasm \
+	--low-memory-unused --gufa --generate-global-effects --converge -O3 \
+	--enable-mutable-globals --enable-nontrapping-float-to-int \
+	--enable-simd --enable-bulk-memory --enable-sign-ext \
+	--enable-reference-types --enable-multivalue \
+	--strip --strip-producers
--- a/embed/exports.txt
+++ b/embed/exports.txt
@@ -59,13 +59,14 @@ sqlite3_db_filename
 sqlite3_db_name
 sqlite3_db_readonly
 sqlite3_db_release_memory
-sqlite3_db_status
+sqlite3_db_status64
 sqlite3_declare_vtab
 sqlite3_errcode
 sqlite3_errmsg
 sqlite3_error_offset
 sqlite3_errstr
 sqlite3_exec
+sqlite3_exec_go
 sqlite3_expanded_sql
 sqlite3_file_control
 sqlite3_filename_database
@@ -97,6 +98,7 @@ sqlite3_result_error_toobig
 sqlite3_result_int64
 sqlite3_result_null
 sqlite3_result_pointer_go
+sqlite3_result_subtype
 sqlite3_result_text_go
 sqlite3_result_value
 sqlite3_result_zeroblob64
@@ -125,6 +127,7 @@ sqlite3_value_int64
 sqlite3_value_nochange
 sqlite3_value_numeric_type
 sqlite3_value_pointer_go
+sqlite3_value_subtype
 sqlite3_value_text
 sqlite3_value_type
 sqlite3_vtab_collation
--- a/embed/init.go
+++ b/embed/init.go
@@ -17,5 +17,7 @@ import (
 var binary string

 func init() {
-	sqlite3.Binary = unsafe.Slice(unsafe.StringData(binary), len(binary))
+	if sqlite3.Binary == nil {
+		sqlite3.Binary = unsafe.Slice(unsafe.StringData(binary), len(binary))
+	}
 }
--- a/embed/init_test.go
+++ b/embed/init_test.go
@@ -19,7 +19,7 @@ func Test_init(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if version != "3.49.1" {
+	if version != "3.51.0" {
 		t.Error(version)
 	}
 }
--- a/embed/sqlite3.wasm
+++ b/embed/sqlite3.wasm
--- a/error.go
+++ b/error.go
@@ -2,7 +2,6 @@ package sqlite3

 import (
 	"errors"
-	"strconv"
 	"strings"

 	"github.com/ncruces/go-sqlite3/internal/util"
@@ -12,7 +11,7 @@ import (
 //
 // https://sqlite.org/c3ref/errcode.html
 type Error struct {
-	str  string
+	sys  error
 	msg  string
 	sql  string
 	code res_t
@@ -29,28 +28,34 @@ func (e *Error) Code() ErrorCode {
 //
 // https://sqlite.org/rescode.html
 func (e *Error) ExtendedCode() ExtendedErrorCode {
-	return ExtendedErrorCode(e.code)
+	return xErrorCode(e.code)
 }

 // Error implements the error interface.
 func (e *Error) Error() string {
 	var b strings.Builder
-	b.WriteString("sqlite3: ")
-
-	if e.str != "" {
-		b.WriteString(e.str)
-	} else {
-		b.WriteString(strconv.Itoa(int(e.code)))
-	}
+	b.WriteString(util.ErrorCodeString(e.code))

 	if e.msg != "" {
 		b.WriteString(": ")
 		b.WriteString(e.msg)
 	}
+	if e.sys != nil {
+		b.WriteString(": ")
+		b.WriteString(e.sys.Error())
+	}

 	return b.String()
 }

+// Unwrap returns the underlying operating system error
+// that caused the I/O error or failure to open a file.
+//
+// https://sqlite.org/c3ref/system_errno.html
+func (e *Error) Unwrap() error {
+	return e.sys
+}
+
 // Is tests whether this error matches a given [ErrorCode] or [ExtendedErrorCode].
 //
 // It makes it possible to do:
@@ -83,7 +88,7 @@ func (e *Error) As(err any) bool {

 // Temporary returns true for [BUSY] errors.
 func (e *Error) Temporary() bool {
-	return e.Code() == BUSY
+	return e.Code() == BUSY || e.Code() == INTERRUPT
 }

 // Timeout returns true for [BUSY_TIMEOUT] errors.
@@ -98,22 +103,31 @@ func (e *Error) SQL() string {

 // Error implements the error interface.
 func (e ErrorCode) Error() string {
-	return util.ErrorCodeString(uint32(e))
+	return util.ErrorCodeString(e)
+}
+
+// As converts this error to an [ExtendedErrorCode].
+func (e ErrorCode) As(err any) bool {
+	c, ok := err.(*xErrorCode)
+	if ok {
+		*c = xErrorCode(e)
+	}
+	return ok
 }

 // Temporary returns true for [BUSY] errors.
 func (e ErrorCode) Temporary() bool {
-	return e == BUSY
+	return e == BUSY || e == INTERRUPT
 }

 // ExtendedCode returns the extended error code for this error.
 func (e ErrorCode) ExtendedCode() ExtendedErrorCode {
-	return ExtendedErrorCode(e)
+	return xErrorCode(e)
 }

 // Error implements the error interface.
 func (e ExtendedErrorCode) Error() string {
-	return util.ErrorCodeString(uint32(e))
+	return util.ErrorCodeString(e)
 }

 // Is tests whether this error matches a given [ErrorCode].
@@ -133,7 +147,7 @@ func (e ExtendedErrorCode) As(err any) bool {

 // Temporary returns true for [BUSY] errors.
 func (e ExtendedErrorCode) Temporary() bool {
-	return ErrorCode(e) == BUSY
+	return ErrorCode(e) == BUSY || ErrorCode(e) == INTERRUPT
 }

 // Timeout returns true for [BUSY_TIMEOUT] errors.
@@ -158,14 +172,10 @@ func errorCode(err error, def ErrorCode) (msg string, code res_t) {
 		return code.msg, res_t(code.code)
 	}

-	var ecode ErrorCode
 	var xcode xErrorCode
-	switch {
-	case errors.As(err, &xcode):
+	if errors.As(err, &xcode) {
 		code = res_t(xcode)
-	case errors.As(err, &ecode):
-		code = res_t(ecode)
-	default:
+	} else {
 		code = res_t(def)
 	}
 	return err.Error(), code
--- a/error_test.go
+++ b/error_test.go
@@ -43,7 +43,7 @@ func TestError(t *testing.T) {
 	if !errors.Is(err, xErrorCode(0x8080)) {
 		t.Errorf("want true")
 	}
-	if s := err.Error(); s != "sqlite3: 32896" {
+	if s := err.Error(); s != "sqlite3: unknown error" {
 		t.Errorf("got %q", s)
 	}
 	if ok := errors.As(err.ExtendedCode(), &ecode); !ok || ecode != ErrorCode(0x80) {
@@ -83,7 +83,7 @@ func TestError_Temporary(t *testing.T) {
 				}
 			}
 			{
-				err := ExtendedErrorCode(tt.code)
+				err := xErrorCode(tt.code)
 				if got := err.Temporary(); got != tt.want {
 					t.Errorf("ExtendedErrorCode.Temporary(%d) = %v, want %v", tt.code, got, tt.want)
 				}
@@ -115,7 +115,7 @@ func TestError_Timeout(t *testing.T) {
 				}
 			}
 			{
-				err := ExtendedErrorCode(tt.code)
+				err := xErrorCode(tt.code)
 				if got := err.Timeout(); got != tt.want {
 					t.Errorf("Error.Timeout(%d) = %v, want %v", tt.code, got, tt.want)
 				}
@@ -156,12 +156,12 @@ func Test_ExtendedErrorCode_Error(t *testing.T) {
 	defer db.Close()

 	// Test all extended error codes.
-	for i := 0; i == int(ExtendedErrorCode(i)); i++ {
+	for i := 0; i == int(xErrorCode(i)); i++ {
 		want := "sqlite3: "
 		ptr := ptr_t(db.call("sqlite3_errstr", stk_t(i)))
 		want += util.ReadString(db.mod, ptr, _MAX_NAME)

-		got := ExtendedErrorCode(i).Error()
+		got := xErrorCode(i).Error()
 		if got != want {
 			t.Fatalf("got %q, want %q, with %d", got, want, i)
 		}
--- a/ext/README.md
+++ b/ext/README.md
@@ -30,7 +30,7 @@ you can load into your database connections.
 - [`github.com/ncruces/go-sqlite3/ext/statement`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/statement)
  creates [parameterized views](https://github.com/0x09/sqlite-statement-vtab).
 - [`github.com/ncruces/go-sqlite3/ext/stats`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/stats)
-  provides [statistics](https://www.oreilly.com/library/view/sql-in-a/9780596155322/ch04s02.html) functions.
+  provides [statistics](https://oreilly.com/library/view/sql-in-a/9780596155322/ch04s02.html) functions.
 - [`github.com/ncruces/go-sqlite3/ext/unicode`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/unicode)
  provides [Unicode aware](https://sqlite.org/src/dir/ext/icu) functions.
 - [`github.com/ncruces/go-sqlite3/ext/uuid`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/uuid)
@@ -38,11 +38,11 @@ you can load into your database connections.
 - [`github.com/ncruces/go-sqlite3/ext/zorder`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/zorder)
  maps multidimensional data to one dimension.

-### Pakages
+### Packages

 These packages may also be useful to work with SQLite:

 - [`github.com/ncruces/decimal`](https://pkg.go.dev/github.com/ncruces/decimal)
  decimal arithmetic.
 - [`github.com/ncruces/julianday`](https://pkg.go.dev/github.com/ncruces/julianday)
-  Julian day math.
+  Julian day math.
--- a/ext/array/array.go
+++ b/ext/array/array.go
@@ -59,7 +59,8 @@ func (c *cursor) Next() error {
 }

 func (c *cursor) RowID() (int64, error) {
-	return int64(c.rowID), nil
+	// One-based RowID for consistency with carray and other tables.
+	return int64(c.rowID) + 1, nil
 }

 func (c *cursor) Column(ctx sqlite3.Context, n int) error {
--- a/ext/array/array_test.go
+++ b/ext/array/array_test.go
@@ -88,9 +88,9 @@ func Example() {

 func Test_cursor_Column(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, array.Register)
+	db, err := driver.Open(dsn, array.Register)
 	if err != nil {
 		t.Fatal(err)
 	}
--- a/ext/blobio/blob_test.go
+++ b/ext/blobio/blob_test.go
@@ -1,6 +1,7 @@
 package blobio_test

 import (
+	"database/sql"
 	"io"
 	"log"
 	"os"
@@ -34,7 +35,8 @@ func Example() {
 	const message = "Hello BLOB!"

 	// Create the BLOB.
-	r, err := db.Exec(`INSERT INTO test VALUES (?)`, sqlite3.ZeroBlob(len(message)))
+	r, err := db.Exec(`INSERT INTO test VALUES (:data)`,
+		sql.Named("data", sqlite3.ZeroBlob(len(message))))
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -45,15 +47,19 @@ func Example() {
 	}

 	// Write the BLOB.
-	_, err = db.Exec(`SELECT writeblob('main', 'test', 'col', ?, 0, ?)`,
-		id, message)
+	_, err = db.Exec(`SELECT writeblob('main', 'test', 'col', :rowid, :offset, :message)`,
+		sql.Named("rowid", id),
+		sql.Named("offset", 0),
+		sql.Named("message", message))
 	if err != nil {
 		log.Fatal(err)
 	}

 	// Read the BLOB.
-	_, err = db.Exec(`SELECT readblob('main', 'test', 'col', ?, 0, ?)`,
-		id, sqlite3.Pointer(os.Stdout))
+	_, err = db.Exec(`SELECT readblob('main', 'test', 'col', :rowid, :offset, :writer)`,
+		sql.Named("rowid", id),
+		sql.Named("offset", 0),
+		sql.Named("writer", sqlite3.Pointer(os.Stdout)))
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -64,7 +70,7 @@ func Example() {
 func TestMain(m *testing.M) {
 	sqlite3.AutoExtension(blobio.Register)
 	sqlite3.AutoExtension(array.Register)
-	m.Run()
+	os.Exit(m.Run())
 }

 func Test_readblob(t *testing.T) {
@@ -138,18 +144,16 @@ func Test_readblob(t *testing.T) {
 				}
 			}

-			if stmt.Step() {
-				got := stmt.ColumnText(0)
-				if got != tt.want1 {
-					t.Errorf("got %q", got)
-				}
+			if !stmt.Step() {
+				t.Fatal(stmt.Err())
+			} else if got := stmt.ColumnText(0); got != tt.want1 {
+				t.Errorf("got %q", got)
 			}

-			if stmt.Step() {
-				got := stmt.ColumnText(0)
-				if got != tt.want2 {
-					t.Errorf("got %q", got)
-				}
+			if !stmt.Step() {
+				t.Fatal(stmt.Err())
+			} else if got := stmt.ColumnText(0); got != tt.want2 {
+				t.Errorf("got %q", got)
 			}

 			err = stmt.Err()
--- a/ext/bloom/bloom.go
+++ b/ext/bloom/bloom.go
@@ -268,13 +268,13 @@ func (b *bloom) Open() (sqlite3.VTabCursor, error) {

 type cursor struct {
 	*bloom
-	arg *sqlite3.Value
+	arg sqlite3.Value
 	eof bool
 }

 func (c *cursor) Filter(idxNum int, idxStr string, arg ...sqlite3.Value) error {
 	c.eof = false
-	c.arg = &arg[0]
+	c.arg = arg[0]
 	blob := arg[0].RawBlob()

 	f, err := c.db.OpenBlob(c.schema, c.storage, "data", 1, false)
@@ -312,7 +312,7 @@ func (c *cursor) Column(ctx sqlite3.Context, n int) error {
 	case 0:
 		ctx.ResultBool(true)
 	case 1:
-		ctx.ResultValue(*c.arg)
+		ctx.ResultValue(c.arg)
 	}
 	return nil
 }
--- a/ext/bloom/bloom_test.go
+++ b/ext/bloom/bloom_test.go
@@ -14,7 +14,7 @@ import (

 func TestMain(m *testing.M) {
 	sqlite3.AutoExtension(bloom.Register)
-	m.Run()
+	os.Exit(m.Run())
 }

 func TestRegister(t *testing.T) {
--- a/ext/closure/closure.go
+++ b/ext/closure/closure.go
@@ -154,6 +154,7 @@ func (c *closure) BestIndex(idx *sqlite3.IndexInfo) error {
 		return sqlite3.CONSTRAINT
 	}

+	idx.IdxFlags = sqlite3.INDEX_SCAN_HEX
 	idx.EstimatedCost = cost
 	idx.IdxNum = plan
 	return nil
--- a/ext/closure/closure_test.go
+++ b/ext/closure/closure_test.go
@@ -4,6 +4,7 @@ import (
 	_ "embed"
 	"fmt"
 	"log"
+	"os"
 	"testing"

 	"github.com/ncruces/go-sqlite3"
@@ -14,7 +15,7 @@ import (

 func TestMain(m *testing.M) {
 	sqlite3.AutoExtension(closure.Register)
-	m.Run()
+	os.Exit(m.Run())
 }

 func Example() {
--- a/ext/csv/csv_test.go
+++ b/ext/csv/csv_test.go
@@ -3,6 +3,7 @@ package csv_test
 import (
 	"fmt"
 	"log"
+	"os"
 	"testing"

 	"github.com/ncruces/go-sqlite3"
@@ -56,7 +57,7 @@ func Example() {

 func TestMain(m *testing.M) {
 	sqlite3.AutoExtension(csv.Register)
-	m.Run()
+	os.Exit(m.Run())
 }

 func TestRegister(t *testing.T) {
@@ -146,20 +147,21 @@ func TestAffinity(t *testing.T) {
 	}
 	defer stmt.Close()

-	if stmt.Step() {
-		if got := stmt.ColumnText(0); got != "1" {
-			t.Errorf("got %q want 1", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnText(0); got != "1" {
+		t.Errorf("got %q want 1", got)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnText(0); got != "0.1" {
-			t.Errorf("got %q want 0.1", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnText(0); got != "0.1" {
+		t.Errorf("got %q want 0.1", got)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnText(0); got != "e" {
-			t.Errorf("got %q want e", got)
-		}
+
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnText(0); got != "e" {
+		t.Errorf("got %q want e", got)
 	}
 }

--- a/ext/fileio/fileio.go
+++ b/ext/fileio/fileio.go
@@ -18,7 +18,7 @@ func Register(db *sqlite3.Conn) error {
 	return RegisterFS(db, nil)
 }

-// Register registers SQL functions readfile, lsmode,
+// RegisterFS registers SQL functions readfile, lsmode,
 // and the table-valued function fsdir;
 // fsys will be used to read files and list directories.
 func RegisterFS(db *sqlite3.Conn, fsys fs.FS) error {
@@ -42,7 +42,7 @@ func lsmode(ctx sqlite3.Context, arg ...sqlite3.Value) {
 	ctx.ResultText(fs.FileMode(arg[0].Int()).String())
 }

-func readfile(fsys fs.FS) func(ctx sqlite3.Context, arg ...sqlite3.Value) {
+func readfile(fsys fs.FS) sqlite3.ScalarFunction {
 	return func(ctx sqlite3.Context, arg ...sqlite3.Value) {
 		var err error
 		var data []byte
--- a/ext/fileio/fileio_test.go
+++ b/ext/fileio/fileio_test.go
@@ -17,9 +17,9 @@ import (

 func Test_lsmode(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, fileio.Register)
+	db, err := driver.Open(dsn, fileio.Register)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -53,9 +53,9 @@ func Test_readfile(t *testing.T) {

 	for _, fsys := range []fs.FS{nil, os.DirFS(".")} {
 		t.Run("", func(t *testing.T) {
-			tmp := memdb.TestDB(t)
+			dsn := memdb.TestDB(t)

-			db, err := driver.Open(tmp, func(c *sqlite3.Conn) error {
+			db, err := driver.Open(dsn, func(c *sqlite3.Conn) error {
 				fileio.RegisterFS(c, fsys)
 				return nil
 			})
--- a/ext/fileio/fsdir.go
+++ b/ext/fileio/fsdir.go
@@ -63,12 +63,12 @@ func (d fsdir) Open() (sqlite3.VTabCursor, error) {

 type cursor struct {
 	fsdir
-	base   string
-	resume func() (entry, bool)
-	cancel func()
-	curr   entry
-	eof    bool
-	rowID  int64
+	base  string
+	next  func() (entry, bool)
+	stop  func()
+	curr  entry
+	eof   bool
+	rowID int64
 }

 type entry struct {
@@ -78,8 +78,8 @@ type entry struct {
 }

 func (c *cursor) Close() error {
-	if c.cancel != nil {
-		c.cancel()
+	if c.stop != nil {
+		c.stop()
 	}
 	return nil
 }
@@ -102,7 +102,7 @@ func (c *cursor) Filter(idxNum int, idxStr string, arg ...sqlite3.Value) error {
 		c.base = base
 	}

-	c.resume, c.cancel = iter.Pull(func(yield func(entry) bool) {
+	c.next, c.stop = iter.Pull(func(yield func(entry) bool) {
 		walkDir := func(path string, d fs.DirEntry, err error) error {
 			if yield(entry{d, err, path}) {
 				return nil
@@ -121,7 +121,7 @@ func (c *cursor) Filter(idxNum int, idxStr string, arg ...sqlite3.Value) error {
 }

 func (c *cursor) Next() error {
-	curr, ok := c.resume()
+	curr, ok := c.next()
 	c.curr = curr
 	c.eof = !ok
 	c.rowID++
--- a/ext/fileio/fsdir_test.go
+++ b/ext/fileio/fsdir_test.go
@@ -21,9 +21,9 @@ func Test_fsdir(t *testing.T) {

 	for _, fsys := range []fs.FS{nil, os.DirFS(".")} {
 		t.Run("", func(t *testing.T) {
-			tmp := memdb.TestDB(t)
+			dsn := memdb.TestDB(t)

-			db, err := driver.Open(tmp, func(c *sqlite3.Conn) error {
+			db, err := driver.Open(dsn, func(c *sqlite3.Conn) error {
 				fileio.RegisterFS(c, fsys)
 				return nil
 			})
--- a/ext/fileio/write_test.go
+++ b/ext/fileio/write_test.go
@@ -15,9 +15,9 @@ import (

 func Test_writefile(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, Register)
+	db, err := driver.Open(dsn, Register)
 	if err != nil {
 		t.Fatal(err)
 	}
--- a/ext/hash/hash_test.go
+++ b/ext/hash/hash_test.go
@@ -4,6 +4,7 @@ import (
 	_ "crypto/md5"
 	_ "crypto/sha1"
 	_ "crypto/sha256"
+	_ "crypto/sha3"
 	_ "crypto/sha512"
 	"testing"

@@ -11,7 +12,6 @@ import (
 	_ "golang.org/x/crypto/blake2s"
 	_ "golang.org/x/crypto/md4"
 	_ "golang.org/x/crypto/ripemd160"
-	_ "golang.org/x/crypto/sha3"

 	"github.com/ncruces/go-sqlite3/driver"
 	_ "github.com/ncruces/go-sqlite3/embed"
@@ -21,7 +21,7 @@ import (

 func TestRegister(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

 	tests := []struct {
 		name string
@@ -55,7 +55,7 @@ func TestRegister(t *testing.T) {
 		{"blake2b('', 256)", "0E5751C026E543B2E8AB2EB06099DAA1D1E5DF47778F7787FAAB45CDF12FE3A8"},
 	}

-	db, err := driver.Open(tmp, Register)
+	db, err := driver.Open(dsn, Register)
 	if err != nil {
 		t.Fatal(err)
 	}
--- a/ext/ipaddr/ipaddr.go
+++ b/ext/ipaddr/ipaddr.go
@@ -0,0 +1,113 @@
+// Package ipaddr provides functions to manipulate IPs and CIDRs.
+//
+// It provides the following functions:
+//   - ipcontains(prefix, ip)
+//   - ipoverlaps(prefix1, prefix2)
+//   - ipfamily(ip/prefix)
+//   - iphost(ip/prefix)
+//   - ipmasklen(prefix)
+//   - ipnetwork(prefix)
+package ipaddr
+
+import (
+	"errors"
+	"net/netip"
+
+	"github.com/ncruces/go-sqlite3"
+)
+
+// Register IP/CIDR functions for a database connection.
+func Register(db *sqlite3.Conn) error {
+	const flags = sqlite3.DETERMINISTIC | sqlite3.INNOCUOUS
+	return errors.Join(
+		db.CreateFunction("ipcontains", 2, flags, contains),
+		db.CreateFunction("ipoverlaps", 2, flags, overlaps),
+		db.CreateFunction("ipfamily", 1, flags, family),
+		db.CreateFunction("iphost", 1, flags, host),
+		db.CreateFunction("ipmasklen", 1, flags, masklen),
+		db.CreateFunction("ipnetwork", 1, flags, network))
+}
+
+func contains(ctx sqlite3.Context, arg ...sqlite3.Value) {
+	prefix, err := netip.ParsePrefix(arg[0].Text())
+	if err != nil {
+		ctx.ResultError(err)
+		return // notest
+	}
+	addr, err := netip.ParseAddr(arg[1].Text())
+	if err != nil {
+		ctx.ResultError(err)
+		return // notest
+	}
+	ctx.ResultBool(prefix.Contains(addr))
+}
+
+func overlaps(ctx sqlite3.Context, arg ...sqlite3.Value) {
+	prefix1, err := netip.ParsePrefix(arg[0].Text())
+	if err != nil {
+		ctx.ResultError(err)
+		return // notest
+	}
+	prefix2, err := netip.ParsePrefix(arg[0].Text())
+	if err != nil {
+		ctx.ResultError(err)
+		return // notest
+	}
+	ctx.ResultBool(prefix1.Overlaps(prefix2))
+}
+
+func family(ctx sqlite3.Context, arg ...sqlite3.Value) {
+	addr, err := addr(arg[0].Text())
+	if err != nil {
+		ctx.ResultError(err)
+		return // notest
+	}
+	switch {
+	case addr.Is4():
+		ctx.ResultInt(4)
+	case addr.Is6():
+		ctx.ResultInt(6)
+	}
+}
+
+func host(ctx sqlite3.Context, arg ...sqlite3.Value) {
+	addr, err := addr(arg[0].Text())
+	if err != nil {
+		ctx.ResultError(err)
+		return // notest
+	}
+	buf, _ := addr.MarshalText()
+	ctx.ResultRawText(buf)
+}
+
+func masklen(ctx sqlite3.Context, arg ...sqlite3.Value) {
+	prefix, err := netip.ParsePrefix(arg[0].Text())
+	if err != nil {
+		ctx.ResultError(err)
+		return // notest
+	}
+	ctx.ResultInt(prefix.Bits())
+}
+
+func network(ctx sqlite3.Context, arg ...sqlite3.Value) {
+	prefix, err := netip.ParsePrefix(arg[0].Text())
+	if err != nil {
+		ctx.ResultError(err)
+		return // notest
+	}
+	buf, _ := prefix.Masked().MarshalText()
+	ctx.ResultRawText(buf)
+}
+
+func addr(text string) (netip.Addr, error) {
+	addr, err := netip.ParseAddr(text)
+	if err != nil {
+		if prefix, err := netip.ParsePrefix(text); err == nil {
+			return prefix.Addr(), nil
+		}
+		if addrpt, err := netip.ParseAddrPort(text); err == nil {
+			return addrpt.Addr(), nil
+		}
+	}
+	return addr, err
+}
--- a/ext/ipaddr/ipaddr_test.go
+++ b/ext/ipaddr/ipaddr_test.go
@@ -0,0 +1,88 @@
+package ipaddr_test
+
+import (
+	"testing"
+
+	"github.com/ncruces/go-sqlite3/driver"
+	_ "github.com/ncruces/go-sqlite3/embed"
+	"github.com/ncruces/go-sqlite3/ext/ipaddr"
+	_ "github.com/ncruces/go-sqlite3/internal/testcfg"
+	"github.com/ncruces/go-sqlite3/vfs/memdb"
+)
+
+func TestRegister(t *testing.T) {
+	t.Parallel()
+	dsn := memdb.TestDB(t)
+
+	db, err := driver.Open(dsn, ipaddr.Register)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	var got string
+
+	err = db.QueryRow(`SELECT ipfamily('::1')`).Scan(&got)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got != "6" {
+		t.Fatalf("got %s", got)
+	}
+
+	err = db.QueryRow(`SELECT ipfamily('[::1]:80')`).Scan(&got)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got != "6" {
+		t.Fatalf("got %s", got)
+	}
+
+	err = db.QueryRow(`SELECT ipfamily('192.168.1.5/24')`).Scan(&got)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got != "4" {
+		t.Fatalf("got %s", got)
+	}
+
+	err = db.QueryRow(`SELECT iphost('192.168.1.5/24')`).Scan(&got)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got != "192.168.1.5" {
+		t.Fatalf("got %s", got)
+	}
+
+	err = db.QueryRow(`SELECT ipmasklen('192.168.1.5/24')`).Scan(&got)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got != "24" {
+		t.Fatalf("got %s", got)
+	}
+
+	err = db.QueryRow(`SELECT ipnetwork('192.168.1.5/24')`).Scan(&got)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got != "192.168.1.0/24" {
+		t.Fatalf("got %s", got)
+	}
+
+	err = db.QueryRow(`SELECT ipcontains('192.168.1.0/24', '192.168.1.5')`).Scan(&got)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got != "1" {
+		t.Fatalf("got %s", got)
+	}
+
+	err = db.QueryRow(`SELECT ipoverlaps('192.168.1.0/24', '192.168.1.5/32')`).Scan(&got)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got != "1" {
+		t.Fatalf("got %s", got)
+	}
+}
--- a/ext/lines/lines_test.go
+++ b/ext/lines/lines_test.go
@@ -67,9 +67,9 @@ func Example() {

 func Test_lines(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, lines.Register)
+	db, err := driver.Open(dsn, lines.Register)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -98,9 +98,9 @@ func Test_lines(t *testing.T) {

 func Test_lines_error(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, lines.Register)
+	db, err := driver.Open(dsn, lines.Register)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -123,9 +123,9 @@ func Test_lines_error(t *testing.T) {

 func Test_lines_read(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, lines.Register)
+	db, err := driver.Open(dsn, lines.Register)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -155,9 +155,9 @@ func Test_lines_read(t *testing.T) {

 func Test_lines_test(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, lines.Register)
+	db, err := driver.Open(dsn, lines.Register)
 	if err != nil {
 		log.Fatal(err)
 	}
--- a/ext/pivot/pivot_test.go
+++ b/ext/pivot/pivot_test.go
@@ -3,6 +3,7 @@ package pivot_test
 import (
 	"fmt"
 	"log"
+	"os"
 	"strings"
 	"testing"

@@ -85,7 +86,7 @@ func Example() {

 func TestMain(m *testing.M) {
 	sqlite3.AutoExtension(pivot.Register)
-	m.Run()
+	os.Exit(m.Run())
 }

 func TestRegister(t *testing.T) {
@@ -140,10 +141,10 @@ func TestRegister(t *testing.T) {
 	}
 	defer stmt.Close()

-	if stmt.Step() {
-		if got := stmt.ColumnInt(0); got != 3 {
-			t.Errorf("got %d, want 3", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnInt(0); got != 3 {
+		t.Errorf("got %d, want 3", got)
 	}

 	err = db.Exec(`ALTER TABLE v_x RENAME TO v_y`)
--- a/ext/regexp/regexp.go
+++ b/ext/regexp/regexp.go
@@ -111,22 +111,24 @@ loop2:
 	return glob.String()
 }

-func load(ctx sqlite3.Context, i int, expr string) (*regexp.Regexp, error) {
+func load(ctx sqlite3.Context, arg []sqlite3.Value, i int) (*regexp.Regexp, error) {
 	re, ok := ctx.GetAuxData(i).(*regexp.Regexp)
 	if !ok {
-		r, err := regexp.Compile(expr)
-		if err != nil {
-			return nil, err
+		re, ok = arg[i].Pointer().(*regexp.Regexp)
+		if !ok {
+			r, err := regexp.Compile(arg[i].Text())
+			if err != nil {
+				return nil, err
+			}
+			re = r
 		}
-		re = r
-		ctx.SetAuxData(0, r)
+		ctx.SetAuxData(i, re)
 	}
 	return re, nil
 }

 func regex(ctx sqlite3.Context, arg ...sqlite3.Value) {
-	_ = arg[1] // bounds check
-	re, err := load(ctx, 0, arg[0].Text())
+	re, err := load(ctx, arg, 0)
 	if err != nil {
 		ctx.ResultError(err)
 		return // notest
@@ -136,18 +138,17 @@ func regex(ctx sqlite3.Context, arg ...sqlite3.Value) {
 }

 func regexLike(ctx sqlite3.Context, arg ...sqlite3.Value) {
-	re, err := load(ctx, 1, arg[1].Text())
+	re, err := load(ctx, arg, 1)
 	if err != nil {
 		ctx.ResultError(err)
 		return // notest
 	}
-
 	text := arg[0].RawText()
 	ctx.ResultBool(re.Match(text))
 }

 func regexCount(ctx sqlite3.Context, arg ...sqlite3.Value) {
-	re, err := load(ctx, 1, arg[1].Text())
+	re, err := load(ctx, arg, 1)
 	if err != nil {
 		ctx.ResultError(err)
 		return // notest
@@ -162,7 +163,7 @@ func regexCount(ctx sqlite3.Context, arg ...sqlite3.Value) {
 }

 func regexSubstr(ctx sqlite3.Context, arg ...sqlite3.Value) {
-	re, err := load(ctx, 1, arg[1].Text())
+	re, err := load(ctx, arg, 1)
 	if err != nil {
 		ctx.ResultError(err)
 		return // notest
@@ -187,7 +188,7 @@ func regexSubstr(ctx sqlite3.Context, arg ...sqlite3.Value) {
 }

 func regexInstr(ctx sqlite3.Context, arg ...sqlite3.Value) {
-	re, err := load(ctx, 1, arg[1].Text())
+	re, err := load(ctx, arg, 1)
 	if err != nil {
 		ctx.ResultError(err)
 		return // notest
@@ -215,16 +216,14 @@ func regexInstr(ctx sqlite3.Context, arg ...sqlite3.Value) {
 }

 func regexReplace(ctx sqlite3.Context, arg ...sqlite3.Value) {
-	_ = arg[2] // bounds check
-
-	re, err := load(ctx, 1, arg[1].Text())
+	re, err := load(ctx, arg, 1)
 	if err != nil {
 		ctx.ResultError(err)
 		return // notest
 	}

-	text := arg[0].RawText()
 	repl := arg[2].RawText()
+	text := arg[0].RawText()
 	var pos, n int
 	if len(arg) > 3 {
 		pos = arg[3].Int()
--- a/ext/regexp/regexp_test.go
+++ b/ext/regexp/regexp_test.go
@@ -6,6 +6,7 @@ import (
 	"strings"
 	"testing"

+	"github.com/ncruces/go-sqlite3"
 	"github.com/ncruces/go-sqlite3/driver"
 	_ "github.com/ncruces/go-sqlite3/embed"
 	_ "github.com/ncruces/go-sqlite3/internal/testcfg"
@@ -14,9 +15,9 @@ import (

 func TestRegister(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, Register)
+	db, err := driver.Open(dsn, Register)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -37,7 +38,7 @@ func TestRegister(t *testing.T) {
 		{`regexp_instr('Hello', '.', 6)`, ""},
 		{`regexp_substr('Hello', 'el.')`, "ell"},
 		{`regexp_replace('Hello', 'llo', 'll')`, "Hell"},
-		// https://www.postgresql.org/docs/current/functions-matching.html
+		// https://postgresql.org/docs/current/functions-matching.html
 		{`regexp_count('ABCABCAXYaxy', 'A.')`, "3"},
 		{`regexp_count('ABCABCAXYaxy', '(?i)A.', 1)`, "4"},
 		{`regexp_instr('number of your street, town zip, FR', '[^,]+', 1, 2)`, "23"},
@@ -79,9 +80,9 @@ func TestRegister(t *testing.T) {

 func TestRegister_errors(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, Register)
+	db, err := driver.Open(dsn, Register)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -104,6 +105,27 @@ func TestRegister_errors(t *testing.T) {
 	}
 }

+func TestRegister_pointer(t *testing.T) {
+	t.Parallel()
+	dsn := memdb.TestDB(t)
+
+	db, err := driver.Open(dsn, Register)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	var got int
+	err = db.QueryRow(`SELECT regexp_count('ABCABCAXYaxy', ?, 1)`,
+		sqlite3.Pointer(regexp.MustCompile(`(?i)A.`))).Scan(&got)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got != 4 {
+		t.Errorf("got %d, want %d", got, 4)
+	}
+}
+
 func TestGlobPrefix(t *testing.T) {
 	tests := []struct {
 		re   string
--- a/ext/serdes/serdes.go
+++ b/ext/serdes/serdes.go
@@ -2,9 +2,8 @@
 package serdes

 import (
-	"io"
-
 	"github.com/ncruces/go-sqlite3"
+	"github.com/ncruces/go-sqlite3/util/vfsutil"
 	"github.com/ncruces/go-sqlite3/vfs"
 )

@@ -14,16 +13,16 @@ func init() {
 	vfs.Register(vfsName, sliceVFS{})
 }

-var fileToOpen = make(chan *sliceFile, 1)
+var fileToOpen = make(chan *[]byte, 1)

 // Serialize backs up a database into a byte slice.
 //
 // https://sqlite.org/c3ref/serialize.html
 func Serialize(db *sqlite3.Conn, schema string) ([]byte, error) {
-	var file sliceFile
+	var file []byte
 	fileToOpen <- &file
-	err := db.Backup(schema, "file:serdes.db?vfs="+vfsName)
-	return file.data, err
+	err := db.Backup(schema, "file:serdes.db?nolock=1&vfs="+vfsName)
+	return file, err
 }

 // Deserialize restores a database from a byte slice,
@@ -41,8 +40,8 @@ func Serialize(db *sqlite3.Conn, schema string) ([]byte, error) {
 // ["memdb"]: https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs/memdb
 // ["reader"]: https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs/readervfs
 func Deserialize(db *sqlite3.Conn, schema string, data []byte) error {
-	fileToOpen <- &sliceFile{data}
-	return db.Restore(schema, "file:serdes.db?vfs="+vfsName)
+	fileToOpen <- &data
+	return db.Restore(schema, "file:serdes.db?immutable=1&vfs="+vfsName)
 }

 type sliceVFS struct{}
@@ -53,14 +52,14 @@ func (sliceVFS) Open(name string, flags vfs.OpenFlag) (vfs.File, vfs.OpenFlag, e
 	}
 	select {
 	case file := <-fileToOpen:
-		return file, flags | vfs.OPEN_MEMORY, nil
+		return (*vfsutil.SliceFile)(file), flags | vfs.OPEN_MEMORY, nil
 	default:
 		return nil, flags, sqlite3.MISUSE
 	}
 }

 func (sliceVFS) Delete(name string, dirSync bool) error {
-	// notest // OPEN_MEMORY
+	// notest // no journals to delete
 	return sqlite3.IOERR_DELETE
 }

@@ -71,70 +70,3 @@ func (sliceVFS) Access(name string, flag vfs.AccessFlag) (bool, error) {
 func (sliceVFS) FullPathname(name string) (string, error) {
 	return name, nil
 }
-
-type sliceFile struct{ data []byte }
-
-func (f *sliceFile) ReadAt(b []byte, off int64) (n int, err error) {
-	if d := f.data; off < int64(len(d)) {
-		n = copy(b, d[off:])
-	}
-	if n == 0 {
-		err = io.EOF
-	}
-	return
-}
-
-func (f *sliceFile) WriteAt(b []byte, off int64) (n int, err error) {
-	if d := f.data; off > int64(len(d)) {
-		f.data = append(d, make([]byte, off-int64(len(d)))...)
-	}
-	d := append(f.data[:off], b...)
-	if len(d) > len(f.data) {
-		f.data = d
-	}
-	return len(b), nil
-}
-
-func (f *sliceFile) Size() (int64, error) {
-	return int64(len(f.data)), nil
-}
-
-func (f *sliceFile) Truncate(size int64) error {
-	if d := f.data; size < int64(len(d)) {
-		f.data = d[:size]
-	}
-	return nil
-}
-
-func (f *sliceFile) SizeHint(size int64) error {
-	if d := f.data; size > int64(len(d)) {
-		f.data = append(d, make([]byte, size-int64(len(d)))...)
-	}
-	return nil
-}
-
-func (*sliceFile) Close() error { return nil }
-
-func (*sliceFile) Sync(flag vfs.SyncFlag) error { return nil }
-
-func (*sliceFile) Lock(lock vfs.LockLevel) error { return nil }
-
-func (*sliceFile) Unlock(lock vfs.LockLevel) error { return nil }
-
-func (*sliceFile) CheckReservedLock() (bool, error) {
-	// notest // OPEN_MEMORY
-	return false, nil
-}
-
-func (*sliceFile) SectorSize() int {
-	// notest // IOCAP_POWERSAFE_OVERWRITE
-	return 0
-}
-
-func (*sliceFile) DeviceCharacteristics() vfs.DeviceCharacteristic {
-	return vfs.IOCAP_ATOMIC |
-		vfs.IOCAP_SAFE_APPEND |
-		vfs.IOCAP_SEQUENTIAL |
-		vfs.IOCAP_POWERSAFE_OVERWRITE |
-		vfs.IOCAP_SUBPAGE_READ
-}
--- a/ext/serdes/serdes_test.go
+++ b/ext/serdes/serdes_test.go
@@ -1,6 +1,7 @@
 package serdes_test

 import (
+	_ "embed"
 	"errors"
 	"io"
 	"net/http"
@@ -11,7 +12,30 @@ import (
 	"github.com/ncruces/go-sqlite3/ext/serdes"
 )

-func TestDeserialize(t *testing.T) {
+//go:embed testdata/wal.db
+var walDB []byte
+
+func Test_wal(t *testing.T) {
+	db, err := sqlite3.Open("testdata/wal.db")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	data, err := serdes.Serialize(db, "main")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	compareDBs(t, data, walDB)
+
+	err = serdes.Deserialize(db, "temp", walDB)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func Test_northwind(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skipping in short mode")
 	}
@@ -37,10 +61,14 @@ func TestDeserialize(t *testing.T) {
 		t.Fatal(err)
 	}

-	if len(input) != len(output) {
+	compareDBs(t, input, output)
+}
+
+func compareDBs(t *testing.T, a, b []byte) {
+	if len(a) != len(b) {
 		t.Fatal("lengths are different")
 	}
-	for i := range input {
+	for i := range a {
 		// These may be different.
 		switch {
 		case 24 <= i && i < 28:
@@ -53,14 +81,14 @@ func TestDeserialize(t *testing.T) {
 			// SQLite version that wrote the file.
 			continue
 		}
-		if input[i] != output[i] {
-			t.Errorf("difference at %d: %d %d", i, input[i], output[i])
+		if a[i] != b[i] {
+			t.Errorf("difference at %d: %d %d", i, a[i], b[i])
 		}
 	}
 }

 func httpGet() ([]byte, error) {
-	res, err := http.Get("https://raw.githubusercontent.com/jpwhite3/northwind-SQLite3/refs/heads/main/dist/northwind.db")
+	res, err := http.Get("https://github.com/jpwhite3/northwind-SQLite3/raw/refs/heads/main/dist/northwind.db")
 	if err != nil {
 		return nil, err
 	}
--- a/ext/serdes/testdata/wal.db
+++ b/ext/serdes/testdata/wal.db
--- a/ext/statement/stmt.go
+++ b/ext/statement/stmt.go
@@ -159,8 +159,6 @@ func (c *cursor) Close() error {
 }

 func (c *cursor) Filter(idxNum int, idxStr string, arg ...sqlite3.Value) error {
-	c.arg = arg
-	c.rowID = 0
 	err := errors.Join(
 		c.stmt.Reset(),
 		c.stmt.ClearBindings())
@@ -187,6 +185,8 @@ func (c *cursor) Filter(idxNum int, idxStr string, arg ...sqlite3.Value) error {
 			return err
 		}
 	}
+	c.arg = append(c.arg[:0], arg...)
+	c.rowID = 0
 	return c.Next()
 }

--- a/ext/statement/stmt_test.go
+++ b/ext/statement/stmt_test.go
@@ -3,6 +3,7 @@ package statement_test
 import (
 	"fmt"
 	"log"
+	"os"
 	"testing"

 	"github.com/ncruces/go-sqlite3"
@@ -50,7 +51,7 @@ func Example() {

 func TestMain(m *testing.M) {
 	sqlite3.AutoExtension(statement.Register)
-	m.Run()
+	os.Exit(m.Run())
 }

 func TestRegister(t *testing.T) {
@@ -91,7 +92,9 @@ func TestRegister(t *testing.T) {
 	}
 	defer stmt.Close()

-	if stmt.Step() {
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else {
 		x := stmt.ColumnInt(0)
 		y := stmt.ColumnInt(1)
 		hypot := stmt.ColumnInt(2)
--- a/ext/stats/TODO.md
+++ b/ext/stats/TODO.md
@@ -1,6 +1,6 @@
 # ANSI SQL Aggregate Functions

-https://www.oreilly.com/library/view/sql-in-a/9780596155322/ch04s02.html
+https://oreilly.com/library/view/sql-in-a/9780596155322/ch04s02.html

 ## Built in aggregates

--- a/ext/stats/boolean.go
+++ b/ext/stats/boolean.go
@@ -7,7 +7,7 @@ const (
 	some
 )

-func newBoolean(kind int) func() sqlite3.AggregateFunction {
+func newBoolean(kind int) sqlite3.AggregateConstructor {
 	return func() sqlite3.AggregateFunction { return &boolean{kind: kind} }
 }

--- a/ext/stats/boolean_test.go
+++ b/ext/stats/boolean_test.go
@@ -37,7 +37,9 @@ func TestRegister_boolean(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else {
 		if got := stmt.ColumnBool(0); got != true {
 			t.Errorf("got %v, want true", got)
 		}
--- a/ext/stats/mode.go
+++ b/ext/stats/mode.go
@@ -19,8 +19,8 @@ type mode struct {

 func (m mode) Value(ctx sqlite3.Context) {
 	var (
-		max = 0
 		typ = sqlite3.NULL
+		max uint
 		i64 int64
 		f64 float64
 		str string
@@ -32,7 +32,6 @@ func (m mode) Value(ctx sqlite3.Context) {
 			i64 = k
 		}
 	}
-	f64 = float64(i64)
 	for k, v := range m.reals {
 		if v > max || v == max && k < f64 {
 			typ = sqlite3.FLOAT
@@ -66,33 +65,45 @@ func (m mode) Value(ctx sqlite3.Context) {
 	}
 }

-func (b *mode) Step(ctx sqlite3.Context, arg ...sqlite3.Value) {
+func (m *mode) Step(ctx sqlite3.Context, arg ...sqlite3.Value) {
 	switch arg[0].Type() {
 	case sqlite3.INTEGER:
-		b.ints.add(arg[0].Int64())
+		if m.reals == nil {
+			m.ints.add(arg[0].Int64())
+			break
+		}
+		fallthrough
 	case sqlite3.FLOAT:
-		b.reals.add(arg[0].Float())
+		m.reals.add(arg[0].Float())
+		for k, v := range m.ints {
+			m.reals[float64(k)] += v
+		}
+		m.ints = nil
 	case sqlite3.TEXT:
-		b.texts.add(arg[0].Text())
+		m.texts.add(arg[0].Text())
 	case sqlite3.BLOB:
-		b.blobs.add(string(arg[0].RawBlob()))
+		m.blobs.add(string(arg[0].RawBlob()))
 	}
 }

-func (b *mode) Inverse(ctx sqlite3.Context, arg ...sqlite3.Value) {
+func (m *mode) Inverse(ctx sqlite3.Context, arg ...sqlite3.Value) {
 	switch arg[0].Type() {
 	case sqlite3.INTEGER:
-		b.ints.del(arg[0].Int64())
+		if m.reals == nil {
+			m.ints.del(arg[0].Int64())
+			break
+		}
+		fallthrough
 	case sqlite3.FLOAT:
-		b.reals.del(arg[0].Float())
+		m.reals.del(arg[0].Float())
 	case sqlite3.TEXT:
-		b.texts.del(arg[0].Text())
+		m.texts.del(arg[0].Text())
 	case sqlite3.BLOB:
-		b.blobs.del(string(arg[0].RawBlob()))
+		m.blobs.del(string(arg[0].RawBlob()))
 	}
 }

-type counter[T comparable] map[T]int
+type counter[T comparable] map[T]uint

 func (c *counter[T]) add(k T) {
 	if (*c) == nil {
@@ -102,11 +113,9 @@ func (c *counter[T]) add(k T) {
 }

 func (c counter[T]) del(k T) {
-	switch n := c[k]; n {
-	default:
-		c[k] = n - 1
-	case 1:
+	if n := c[k]; n == 1 {
 		delete(c, k)
-	case 0:
+	} else {
+		c[k] = n - 1
 	}
 }
--- a/ext/stats/mode_test.go
+++ b/ext/stats/mode_test.go
@@ -21,10 +21,10 @@ func TestRegister_mode(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnInt(0); got != 3 {
-			t.Errorf("got %v, want 3", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnInt(0); got != 3 {
+		t.Errorf("got %v, want 3", got)
 	}
 	stmt.Close()

@@ -32,10 +32,10 @@ func TestRegister_mode(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnInt(0); got != 1 {
-			t.Errorf("got %v, want 1", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnInt(0); got != 1 {
+		t.Errorf("got %v, want 1", got)
 	}
 	stmt.Close()

@@ -43,10 +43,10 @@ func TestRegister_mode(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnFloat(0); got != 2.5 {
-			t.Errorf("got %v, want 2.5", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnFloat(0); got != 2.5 {
+		t.Errorf("got %v, want 2.5", got)
 	}
 	stmt.Close()

@@ -54,21 +54,22 @@ func TestRegister_mode(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnText(0); got != "red" {
-			t.Errorf("got %q, want red", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnText(0); got != "red" {
+		t.Errorf("got %q, want red", got)
 	}
+
 	stmt.Close()

 	stmt, _, err = db.Prepare(`SELECT mode(column1) FROM (VALUES (X'cafebabe'), ('green'), ('blue'), (X'cafebabe'))`)
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnText(0); got != "\xca\xfe\xba\xbe" {
-			t.Errorf("got %q, want cafebabe", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnText(0); got != "\xca\xfe\xba\xbe" {
+		t.Errorf("got %q, want cafebabe", got)
 	}
 	stmt.Close()

@@ -82,4 +83,20 @@ func TestRegister_mode(t *testing.T) {
 	for stmt.Step() {
 	}
 	stmt.Close()
+
+	stmt, _, err = db.Prepare(`SELECT mode(column1) FROM (VALUES (?), (?), (?), (?), (?))`)
+	if err != nil {
+		t.Fatal(err)
+	}
+	stmt.BindInt(1, 1)
+	stmt.BindInt(2, 1)
+	stmt.BindInt(3, 2)
+	stmt.BindFloat(4, 2)
+	stmt.BindFloat(5, 2)
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnInt(0); got != 2 {
+		t.Errorf("got %v, want 2", got)
+	}
+	stmt.Close()
 }
--- a/ext/stats/percentile.go
+++ b/ext/stats/percentile.go
@@ -21,7 +21,7 @@ const (
 	percentile_disc
 )

-func newPercentile(kind int) func() sqlite3.AggregateFunction {
+func newPercentile(kind int) sqlite3.AggregateConstructor {
 	return func() sqlite3.AggregateFunction { return &percentile{kind: kind} }
 }

--- a/ext/stats/percentile_test.go
+++ b/ext/stats/percentile_test.go
@@ -38,7 +38,9 @@ func TestRegister_percentile(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else {
 		if got := stmt.ColumnFloat(0); got != 10 {
 			t.Errorf("got %v, want 10", got)
 		}
@@ -65,30 +67,30 @@ func TestRegister_percentile(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnFloat(0); got != 5.5 {
-			t.Errorf("got %v, want 5.5", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnFloat(0); got != 5.5 {
+		t.Errorf("got %v, want 5.5", got)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnFloat(0); got != 7 {
-			t.Errorf("got %v, want 7", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnFloat(0); got != 7 {
+		t.Errorf("got %v, want 7", got)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnFloat(0); got != 10 {
-			t.Errorf("got %v, want 10", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnFloat(0); got != 10 {
+		t.Errorf("got %v, want 10", got)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnFloat(0); got != 14.5 {
-			t.Errorf("got %v, want 14.5", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnFloat(0); got != 14.5 {
+		t.Errorf("got %v, want 14.5", got)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnFloat(0); got != 16 {
-			t.Errorf("got %v, want 16", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnFloat(0); got != 16 {
+		t.Errorf("got %v, want 16", got)
 	}
 	stmt.Close()

@@ -103,7 +105,9 @@ func TestRegister_percentile(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else {
 		if got := stmt.ColumnFloat(0); got != 4 {
 			t.Errorf("got %v, want 4", got)
 		}
@@ -134,7 +138,9 @@ func TestRegister_percentile(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else {
 		if got := stmt.ColumnType(0); got != sqlite3.NULL {
 			t.Error("want NULL")
 		}
--- a/ext/stats/stats.go
+++ b/ext/stats/stats.go
@@ -47,7 +47,7 @@
 //
 // [Built-in Aggregate Functions]: https://sqlite.org/lang_aggfunc.html
 // [Built-in Window Functions]: https://sqlite.org/windowfunctions.html#builtins
-// [ANSI SQL Aggregate Functions]: https://www.oreilly.com/library/view/sql-in-a/9780596155322/ch04s02.html
+// [ANSI SQL Aggregate Functions]: https://oreilly.com/library/view/sql-in-a/9780596155322/ch04s02.html
 package stats

 import (
@@ -58,8 +58,11 @@ import (

 // Register registers statistics functions.
 func Register(db *sqlite3.Conn) error {
-	const flags = sqlite3.DETERMINISTIC | sqlite3.INNOCUOUS
-	const order = sqlite3.SELFORDER1 | flags
+	const (
+		flags = sqlite3.DETERMINISTIC | sqlite3.INNOCUOUS
+		json  = sqlite3.RESULT_SUBTYPE | flags
+		order = sqlite3.SELFORDER1 | flags
+	)
 	return errors.Join(
 		db.CreateWindowFunction("var_pop", 1, flags, newVariance(var_pop)),
 		db.CreateWindowFunction("var_samp", 1, flags, newVariance(var_samp)),
@@ -81,7 +84,7 @@ func Register(db *sqlite3.Conn) error {
 		db.CreateWindowFunction("regr_slope", 2, flags, newCovariance(regr_slope)),
 		db.CreateWindowFunction("regr_intercept", 2, flags, newCovariance(regr_intercept)),
 		db.CreateWindowFunction("regr_count", 2, flags, newCovariance(regr_count)),
-		db.CreateWindowFunction("regr_json", 2, flags, newCovariance(regr_json)),
+		db.CreateWindowFunction("regr_json", 2, json, newCovariance(regr_json)),
 		db.CreateWindowFunction("median", 1, order, newPercentile(median)),
 		db.CreateWindowFunction("percentile", 2, order, newPercentile(percentile_100)),
 		db.CreateWindowFunction("percentile_cont", 2, order, newPercentile(percentile_cont)),
@@ -130,7 +133,7 @@ func special(kind int, n int64) (null, zero bool) {
 	}
 }

-func newVariance(kind int) func() sqlite3.AggregateFunction {
+func newVariance(kind int) sqlite3.AggregateConstructor {
 	return func() sqlite3.AggregateFunction { return &variance{kind: kind} }
 }

@@ -178,7 +181,7 @@ func (fn *variance) Inverse(ctx sqlite3.Context, arg ...sqlite3.Value) {
 	}
 }

-func newCovariance(kind int) func() sqlite3.AggregateFunction {
+func newCovariance(kind int) sqlite3.AggregateConstructor {
 	return func() sqlite3.AggregateFunction { return &covariance{kind: kind} }
 }

@@ -227,6 +230,7 @@ func (fn *covariance) Value(ctx sqlite3.Context) {
 	case regr_json:
 		var buf [128]byte
 		ctx.ResultRawText(fn.regr_json(buf[:0]))
+		ctx.ResultSubtype('J')
 		return
 	}
 	ctx.ResultFloat(r)
@@ -254,7 +258,7 @@ func (fn *covariance) Inverse(ctx sqlite3.Context, arg ...sqlite3.Value) {
 	}
 }

-func newMoments(kind int) func() sqlite3.AggregateFunction {
+func newMoments(kind int) sqlite3.AggregateConstructor {
 	return func() sqlite3.AggregateFunction { return &momentfn{kind: kind} }
 }

--- a/ext/stats/stats_test.go
+++ b/ext/stats/stats_test.go
@@ -2,6 +2,7 @@ package stats_test

 import (
 	"math"
+	"os"
 	"testing"

 	"github.com/ncruces/go-sqlite3"
@@ -12,7 +13,7 @@ import (

 func TestMain(m *testing.M) {
 	sqlite3.AutoExtension(stats.Register)
-	m.Run()
+	os.Exit(m.Run())
 }

 func TestRegister_variance(t *testing.T) {
@@ -33,10 +34,10 @@ func TestRegister_variance(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnType(0); got != sqlite3.NULL {
-			t.Errorf("got %v, want NULL", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else if got := stmt.ColumnType(0); got != sqlite3.NULL {
+		t.Errorf("got %v, want NULL", got)
 	}
 	stmt.Close()

@@ -56,7 +57,9 @@ func TestRegister_variance(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else {
 		if got := stmt.ColumnFloat(0); got != 40 {
 			t.Errorf("got %v, want 40", got)
 		}
@@ -130,7 +133,9 @@ func TestRegister_covariance(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	} else {
 		if got := stmt.ColumnInt(0); got != 0 {
 			t.Errorf("got %v, want 0", got)
 		}
@@ -155,49 +160,50 @@ func TestRegister_covariance(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if stmt.Step() {
-		if got := stmt.ColumnFloat(0); got != 0.9881049293224639 {
-			t.Errorf("got %v, want 0.9881049293224639", got)
-		}
-		if got := stmt.ColumnFloat(1); got != 21.25 {
-			t.Errorf("got %v, want 21.25", got)
-		}
-		if got := stmt.ColumnFloat(2); got != 17 {
-			t.Errorf("got %v, want 17", got)
-		}
-		if got := stmt.ColumnFloat(3); got != 4.2 {
-			t.Errorf("got %v, want 4.2", got)
-		}
-		if got := stmt.ColumnFloat(4); got != 75 {
-			t.Errorf("got %v, want 75", got)
-		}
-		if got := stmt.ColumnFloat(5); got != 14.8 {
-			t.Errorf("got %v, want 14.8", got)
-		}
-		if got := stmt.ColumnFloat(6); got != 500 {
-			t.Errorf("got %v, want 500", got)
-		}
-		if got := stmt.ColumnFloat(7); got != 85 {
-			t.Errorf("got %v, want 85", got)
-		}
-		if got := stmt.ColumnFloat(8); got != 0.17 {
-			t.Errorf("got %v, want 0.17", got)
-		}
-		if got := stmt.ColumnFloat(9); got != -8.55 {
-			t.Errorf("got %v, want -8.55", got)
-		}
-		if got := stmt.ColumnFloat(10); got != 0.9763513513513513 {
-			t.Errorf("got %v, want 0.9763513513513513", got)
-		}
-		if got := stmt.ColumnInt(11); got != 5 {
-			t.Errorf("got %v, want 5", got)
-		}
-		var a map[string]float64
-		if err := stmt.ColumnJSON(12, &a); err != nil {
-			t.Error(err)
-		} else if got := a["count"]; got != 5 {
-			t.Errorf("got %v, want 5", got)
-		}
+	if !stmt.Step() {
+		t.Fatal(stmt.Err())
+	}
+	if got := stmt.ColumnFloat(0); got != 0.9881049293224639 {
+		t.Errorf("got %v, want 0.9881049293224639", got)
+	}
+	if got := stmt.ColumnFloat(1); got != 21.25 {
+		t.Errorf("got %v, want 21.25", got)
+	}
+	if got := stmt.ColumnFloat(2); got != 17 {
+		t.Errorf("got %v, want 17", got)
+	}
+	if got := stmt.ColumnFloat(3); got != 4.2 {
+		t.Errorf("got %v, want 4.2", got)
+	}
+	if got := stmt.ColumnFloat(4); got != 75 {
+		t.Errorf("got %v, want 75", got)
+	}
+	if got := stmt.ColumnFloat(5); got != 14.8 {
+		t.Errorf("got %v, want 14.8", got)
+	}
+	if got := stmt.ColumnFloat(6); got != 500 {
+		t.Errorf("got %v, want 500", got)
+	}
+	if got := stmt.ColumnFloat(7); got != 85 {
+		t.Errorf("got %v, want 85", got)
+	}
+	if got := stmt.ColumnFloat(8); got != 0.17 {
+		t.Errorf("got %v, want 0.17", got)
+	}
+	if got := stmt.ColumnFloat(9); got != -8.55 {
+		t.Errorf("got %v, want -8.55", got)
+	}
+	if got := stmt.ColumnFloat(10); got != 0.9763513513513513 {
+		t.Errorf("got %v, want 0.9763513513513513", got)
+	}
+	if got := stmt.ColumnInt(11); got != 5 {
+		t.Errorf("got %v, want 5", got)
+	}
+	var a map[string]float64
+	if err := stmt.ColumnJSON(12, &a); err != nil {
+		t.Error(err)
+	} else if got := a["count"]; got != 5 {
+		t.Errorf("got %v, want 5", got)
 	}
 	stmt.Close()

@@ -247,7 +253,9 @@ func Benchmark_average(b *testing.B) {
 		b.Fatal(err)
 	}

-	if stmt.Step() {
+	if !stmt.Step() {
+		b.Fatal(stmt.Err())
+	} else {
 		want := float64(b.N) / 2
 		if got := stmt.ColumnFloat(0); got != want {
 			b.Errorf("got %v, want %v", got, want)
@@ -281,7 +289,9 @@ func Benchmark_variance(b *testing.B) {
 		b.Fatal(err)
 	}

-	if stmt.Step() && b.N > 100 {
+	if !stmt.Step() {
+		b.Fatal(stmt.Err())
+	} else if b.N > 100 {
 		want := float64(b.N*b.N) / 12
 		if got := stmt.ColumnFloat(0); want > (got-want)*float64(b.N) {
 			b.Errorf("got %v, want %v", got, want)
--- a/ext/unicode/unicode.go
+++ b/ext/unicode/unicode.go
@@ -1,21 +1,22 @@
 // Package unicode provides an alternative to the SQLite ICU extension.
 //
 // Like the [ICU extension], it provides Unicode aware:
-//   - upper() and lower() functions,
-//   - LIKE and REGEXP operators,
-//   - collation sequences.
+//   - upper() and lower() functions
+//   - LIKE and REGEXP operators
+//   - collation sequences
 //
-// The implementation is not 100% compatible with the [ICU extension]:
-//   - upper() and lower() use [strings.ToUpper], [strings.ToLower] and [cases];
-//   - the LIKE operator follows [strings.EqualFold] rules;
-//   - the REGEXP operator uses Go [regexp/syntax];
-//   - collation sequences use [collate].
+// Like PostgreSQL, it also provides:
+//   - initcap()
+//   - casefold()
+//   - normalize()
+//   - unaccent()
 //
-// It also provides (approximately) from PostgreSQL:
-//   - casefold(),
-//   - initcap(),
-//   - normalize(),
-//   - unaccent().
+// The implementations are not 100% compatible:
+//   - upper(), lower(), initcap() casefold() use [strings.ToUpper], [strings.ToLower], [strings.Title] and [cases]
+//   - normalize(), unaccent() use [transform] and [unicode.Mn]
+//   - the LIKE operator follows [strings.EqualFold] rules
+//   - the REGEXP operator uses Go [regexp/syntax]
+//   - collation sequences use [collate]
 //
 // Expect subtle differences (e.g.) in the handling of Turkish case folding.
 //
@@ -27,6 +28,7 @@ import (
 	"errors"
 	"regexp"
 	"strings"
+	"sync"
 	"unicode"
 	"unicode/utf8"

@@ -41,7 +43,7 @@ import (
 	"github.com/ncruces/go-sqlite3/internal/util"
 )

-// Set RegisterLike to false to not register a Unicode aware LIKE operator.
+// RegisterLike must be set to false to not register a Unicode aware LIKE operator.
 // Overriding the built-in LIKE operator disables the [LIKE optimization].
 //
 // [LIKE optimization]: https://sqlite.org/optoverview.html#the_like_optimization
@@ -113,9 +115,8 @@ func upper(ctx sqlite3.Context, arg ...sqlite3.Value) {
 			ctx.ResultError(err)
 			return // notest
 		}
-		c := cases.Upper(t)
-		ctx.SetAuxData(1, c)
-		cs = c
+		cs = cases.Upper(t)
+		ctx.SetAuxData(1, cs)
 	}
 	ctx.ResultRawText(cs.Bytes(arg[0].RawText()))
 }
@@ -132,9 +133,8 @@ func lower(ctx sqlite3.Context, arg ...sqlite3.Value) {
 			ctx.ResultError(err)
 			return // notest
 		}
-		c := cases.Lower(t)
-		ctx.SetAuxData(1, c)
-		cs = c
+		cs = cases.Lower(t)
+		ctx.SetAuxData(1, cs)
 	}
 	ctx.ResultRawText(cs.Bytes(arg[0].RawText()))
 }
@@ -151,9 +151,8 @@ func initcap(ctx sqlite3.Context, arg ...sqlite3.Value) {
 			ctx.ResultError(err)
 			return // notest
 		}
-		c := cases.Title(t)
-		ctx.SetAuxData(1, c)
-		cs = c
+		cs = cases.Title(t)
+		ctx.SetAuxData(1, cs)
 	}
 	ctx.ResultRawText(cs.Bytes(arg[0].RawText()))
 }
@@ -162,8 +161,16 @@ func casefold(ctx sqlite3.Context, arg ...sqlite3.Value) {
 	ctx.ResultRawText(cases.Fold().Bytes(arg[0].RawText()))
 }

+var unaccentPool = sync.Pool{
+	New: func() any {
+		return transform.Chain(norm.NFD, runes.Remove(runes.In(unicode.Mn)), norm.NFC)
+	},
+}
+
 func unaccent(ctx sqlite3.Context, arg ...sqlite3.Value) {
-	unaccent := transform.Chain(norm.NFD, runes.Remove(runes.In(unicode.Mn)), norm.NFC)
+	unaccent := unaccentPool.Get().(transform.Transformer)
+	defer unaccentPool.Put(unaccent)
+
 	res, _, err := transform.Bytes(unaccent, arg[0].RawText())
 	if err != nil {
 		ctx.ResultError(err) // notest
@@ -200,13 +207,16 @@ func normalize(ctx sqlite3.Context, arg ...sqlite3.Value) {
 func regex(ctx sqlite3.Context, arg ...sqlite3.Value) {
 	re, ok := ctx.GetAuxData(0).(*regexp.Regexp)
 	if !ok {
-		r, err := regexp.Compile(arg[0].Text())
-		if err != nil {
-			ctx.ResultError(err)
-			return // notest
+		re, ok = arg[0].Pointer().(*regexp.Regexp)
+		if !ok {
+			r, err := regexp.Compile(arg[0].Text())
+			if err != nil {
+				ctx.ResultError(err)
+				return // notest
+			}
+			re = r
 		}
-		re = r
-		ctx.SetAuxData(0, r)
+		ctx.SetAuxData(0, re)
 	}
 	ctx.ResultBool(re.Match(arg[1].RawText()))
 }
--- a/ext/unicode/unicode_test.go
+++ b/ext/unicode/unicode_test.go
@@ -26,11 +26,10 @@ func TestRegister(t *testing.T) {
 		}
 		defer stmt.Close()

-		if stmt.Step() {
-			return stmt.ColumnText(0)
+		if !stmt.Step() {
+			t.Fatal(stmt.Err())
 		}
-		t.Fatal(stmt.Err())
-		return ""
+		return stmt.ColumnText(0)
 	}

 	Register(db)
--- a/ext/uuid/uuid.go
+++ b/ext/uuid/uuid.go
@@ -17,17 +17,18 @@ import (

 // Register registers the SQL functions:
 //
-//	uuid([version], [domain/namespace], [id/data])
-//
-// Generates a UUID as a string.
-//
-//	uuid_str(u)
-//
-// Converts a UUID into a well-formed UUID string.
-//
-//	uuid_blob(u)
-//
-// Converts a UUID into a 16-byte blob.
+//   - uuid([ version [, domain/namespace, [ id/data ]]]):
+//     to generate a UUID as a string
+//   - uuid_str(u):
+//     to convert a UUID into a well-formed UUID string
+//   - uuid_blob(u):
+//     to convert a UUID into a 16-byte blob
+//   - uuid_extract_version(u):
+//     to extract the version of a RFC 4122 UUID
+//   - uuid_extract_timestamp(u):
+//     to extract the timestamp of a version 1/2/6/7 UUID
+//   - gen_random_uuid(u):
+//     to generate a version 4 (random) UUID
 func Register(db *sqlite3.Conn) error {
 	const flags = sqlite3.DETERMINISTIC | sqlite3.INNOCUOUS
 	return errors.Join(
@@ -38,7 +39,8 @@ func Register(db *sqlite3.Conn) error {
 		db.CreateFunction("uuid_str", 1, flags, toString),
 		db.CreateFunction("uuid_blob", 1, flags, toBlob),
 		db.CreateFunction("uuid_extract_version", 1, flags, version),
-		db.CreateFunction("uuid_extract_timestamp", 1, flags, timestamp))
+		db.CreateFunction("uuid_extract_timestamp", 1, flags, timestamp),
+		db.CreateFunction("gen_random_uuid", 0, sqlite3.INNOCUOUS, generate))
 }

 func generate(ctx sqlite3.Context, arg ...sqlite3.Value) {
@@ -192,7 +194,7 @@ func timestamp(ctx sqlite3.Context, arg ...sqlite3.Value) {
 		switch u.Version() {
 		case 1, 2, 6, 7:
 			ctx.ResultTime(
-				time.Unix(u.Time().UnixTime()),
+				time.Unix(u.Time().UnixTime()).UTC(),
 				sqlite3.TimeFormatDefault)
 		}
 	}
--- a/ext/uuid/uuid_test.go
+++ b/ext/uuid/uuid_test.go
@@ -14,9 +14,9 @@ import (

 func Test_generate(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, Register)
+	db, err := driver.Open(dsn, Register)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -153,9 +153,9 @@ func Test_generate(t *testing.T) {

 func Test_convert(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, Register)
+	db, err := driver.Open(dsn, Register)
 	if err != nil {
 		t.Fatal(err)
 	}
--- a/ext/zorder/zorder.go
+++ b/ext/zorder/zorder.go
@@ -19,9 +19,9 @@ func Register(db *sqlite3.Conn) error {
 }

 func zorder(ctx sqlite3.Context, arg ...sqlite3.Value) {
-	var x [63]int64
-	if len(arg) > len(x) {
-		ctx.ResultError(util.ErrorString("zorder: too many parameters"))
+	var x [24]int64
+	if n := len(arg); n < 2 || n > 24 {
+		ctx.ResultError(util.ErrorString("zorder: needs between 2 and 24 dimensions"))
 		return
 	}
 	for i := range arg {
@@ -29,17 +29,15 @@ func zorder(ctx sqlite3.Context, arg ...sqlite3.Value) {
 	}

 	var z int64
-	if len(arg) > 0 {
-		for i := range x {
-			j := i % len(arg)
-			z |= (x[j] & 1) << i
-			x[j] >>= 1
-		}
+	for i := range 63 {
+		j := i % len(arg)
+		z |= (x[j] & 1) << i
+		x[j] >>= 1
 	}

 	for i := range arg {
 		if x[i] != 0 {
-			ctx.ResultError(util.ErrorString("zorder: parameter too large"))
+			ctx.ResultError(util.ErrorString("zorder: argument out of range"))
 			return
 		}
 	}
@@ -51,6 +49,19 @@ func unzorder(ctx sqlite3.Context, arg ...sqlite3.Value) {
 	n := arg[1].Int64()
 	z := arg[0].Int64()

+	if n < 2 || n > 24 {
+		ctx.ResultError(util.ErrorString("unzorder: needs between 2 and 24 dimensions"))
+		return
+	}
+	if i < 0 || i >= n {
+		ctx.ResultError(util.ErrorString("unzorder: index out of range"))
+		return
+	}
+	if z < 0 {
+		ctx.ResultError(util.ErrorString("unzorder: argument out of range"))
+		return
+	}
+
 	var k int
 	var x int64
 	for j := i; j < 63; j += n {
--- a/ext/zorder/zorder_test.go
+++ b/ext/zorder/zorder_test.go
@@ -12,11 +12,11 @@ import (
 	"github.com/ncruces/go-sqlite3/vfs/memdb"
 )

-func TestRegister_zorder(t *testing.T) {
+func Test_zorder(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, zorder.Register)
+	db, err := driver.Open(dsn, zorder.Register)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -57,11 +57,11 @@ func TestRegister_zorder(t *testing.T) {
 	}
 }

-func TestRegister_unzorder(t *testing.T) {
+func Test_unzorder(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, zorder.Register)
+	db, err := driver.Open(dsn, zorder.Register)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -85,11 +85,11 @@ func TestRegister_unzorder(t *testing.T) {
 	}
 }

-func TestRegister_error(t *testing.T) {
+func Test_zorder_error(t *testing.T) {
 	t.Parallel()
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

-	db, err := driver.Open(tmp, zorder.Register)
+	db, err := driver.Open(dsn, zorder.Register)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -103,7 +103,7 @@ func TestRegister_error(t *testing.T) {

 	var buf strings.Builder
 	buf.WriteString("SELECT zorder(0")
-	for i := 1; i < 80; i++ {
+	for i := 1; i < 25; i++ {
 		buf.WriteByte(',')
 		buf.WriteString(strconv.Itoa(0))
 	}
@@ -113,3 +113,30 @@ func TestRegister_error(t *testing.T) {
 		t.Error("want error")
 	}
 }
+
+func Test_unzorder_error(t *testing.T) {
+	t.Parallel()
+	dsn := memdb.TestDB(t)
+
+	db, err := driver.Open(dsn, zorder.Register)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	var got int64
+	err = db.QueryRow(`SELECT unzorder(-1, 2, 0)`).Scan(&got)
+	if err == nil {
+		t.Error("want error")
+	}
+
+	err = db.QueryRow(`SELECT unzorder(0, 2, 2)`).Scan(&got)
+	if err == nil {
+		t.Error("want error")
+	}
+
+	err = db.QueryRow(`SELECT unzorder(0, 25, 2)`).Scan(&got)
+	if err == nil {
+		t.Error("want error")
+	}
+}
--- a/func.go
+++ b/func.go
@@ -3,7 +3,9 @@ package sqlite3
 import (
 	"context"
 	"io"
+	"iter"
 	"sync"
+	"sync/atomic"

 	"github.com/tetratelabs/wazero/api"

@@ -45,7 +47,7 @@ func (c Conn) AnyCollationNeeded() error {
 // CreateCollation defines a new collating sequence.
 //
 // https://sqlite.org/c3ref/create_collation.html
-func (c *Conn) CreateCollation(name string, fn func(a, b []byte) int) error {
+func (c *Conn) CreateCollation(name string, fn CollatingFunction) error {
 	var funcPtr ptr_t
 	defer c.arena.mark()()
 	namePtr := c.arena.string(name)
@@ -57,6 +59,10 @@ func (c *Conn) CreateCollation(name string, fn func(a, b []byte) int) error {
 	return c.error(rc)
 }

+// CollatingFunction is the type of a collation callback.
+// Implementations must not retain a or b.
+type CollatingFunction func(a, b []byte) int
+
 // CreateFunction defines a new scalar SQL function.
 //
 // https://sqlite.org/c3ref/create_function.html
@@ -77,34 +83,67 @@ func (c *Conn) CreateFunction(name string, nArg int, flag FunctionFlag, fn Scala
 // Implementations must not retain arg.
 type ScalarFunction func(ctx Context, arg ...Value)

-// CreateWindowFunction defines a new aggregate or aggregate window SQL function.
-// If fn returns a [WindowFunction], then an aggregate window function is created.
-// If fn returns an [io.Closer], it will be called to free resources.
+// CreateAggregateFunction defines a new aggregate SQL function.
 //
 // https://sqlite.org/c3ref/create_function.html
-func (c *Conn) CreateWindowFunction(name string, nArg int, flag FunctionFlag, fn func() AggregateFunction) error {
+func (c *Conn) CreateAggregateFunction(name string, nArg int, flag FunctionFlag, fn AggregateSeqFunction) error {
 	var funcPtr ptr_t
 	defer c.arena.mark()()
 	namePtr := c.arena.string(name)
-	call := "sqlite3_create_aggregate_function_go"
 	if fn != nil {
-		agg := fn()
-		if c, ok := agg.(io.Closer); ok {
-			if err := c.Close(); err != nil {
-				return err
+		funcPtr = util.AddHandle(c.ctx, AggregateConstructor(func() AggregateFunction {
+			var a aggregateFunc
+			coro := func(yieldCoro func(struct{}) bool) {
+				seq := func(yieldSeq func([]Value) bool) {
+					for yieldSeq(a.arg) {
+						if !yieldCoro(struct{}{}) {
+							break
+						}
+					}
+				}
+				fn(&a.ctx, seq)
 			}
-		}
-		if _, ok := agg.(WindowFunction); ok {
-			call = "sqlite3_create_window_function_go"
-		}
-		funcPtr = util.AddHandle(c.ctx, fn)
+			a.next, a.stop = iter.Pull(coro)
+			return &a
+		}))
 	}
-	rc := res_t(c.call(call,
+	rc := res_t(c.call("sqlite3_create_aggregate_function_go",
 		stk_t(c.handle), stk_t(namePtr), stk_t(nArg),
 		stk_t(flag), stk_t(funcPtr)))
 	return c.error(rc)
 }

+// AggregateSeqFunction is the type of an aggregate SQL function.
+// Implementations must not retain the slices yielded by seq.
+type AggregateSeqFunction func(ctx *Context, seq iter.Seq[[]Value])
+
+// CreateWindowFunction defines a new aggregate or aggregate window SQL function.
+// If fn returns a [WindowFunction], an aggregate window function is created.
+// If fn returns an [io.Closer], it will be called to free resources.
+//
+// https://sqlite.org/c3ref/create_function.html
+func (c *Conn) CreateWindowFunction(name string, nArg int, flag FunctionFlag, fn AggregateConstructor) error {
+	var funcPtr ptr_t
+	defer c.arena.mark()()
+	namePtr := c.arena.string(name)
+	if fn != nil {
+		funcPtr = util.AddHandle(c.ctx, AggregateConstructor(func() AggregateFunction {
+			agg := fn()
+			if win, ok := agg.(WindowFunction); ok {
+				return win
+			}
+			return agg
+		}))
+	}
+	rc := res_t(c.call("sqlite3_create_window_function_go",
+		stk_t(c.handle), stk_t(namePtr), stk_t(nArg),
+		stk_t(flag), stk_t(funcPtr)))
+	return c.error(rc)
+}
+
+// AggregateConstructor is a an [AggregateFunction] constructor.
+type AggregateConstructor func() AggregateFunction
+
 // AggregateFunction is the interface an aggregate function should implement.
 //
 // https://sqlite.org/appfunc.html
@@ -153,26 +192,24 @@ func collationCallback(ctx context.Context, mod api.Module, pArg, pDB ptr_t, eTe
 }

 func compareCallback(ctx context.Context, mod api.Module, pApp ptr_t, nKey1 int32, pKey1 ptr_t, nKey2 int32, pKey2 ptr_t) uint32 {
-	fn := util.GetHandle(ctx, pApp).(func(a, b []byte) int)
+	fn := util.GetHandle(ctx, pApp).(CollatingFunction)
 	return uint32(fn(util.View(mod, pKey1, int64(nKey1)), util.View(mod, pKey2, int64(nKey2))))
 }

 func funcCallback(ctx context.Context, mod api.Module, pCtx, pApp ptr_t, nArg int32, pArg ptr_t) {
-	args := getFuncArgs()
-	defer putFuncArgs(args)
 	db := ctx.Value(connKey{}).(*Conn)
+	args := callbackArgs(db, nArg, pArg)
+	defer returnArgs(args)
 	fn := util.GetHandle(db.ctx, pApp).(ScalarFunction)
-	callbackArgs(db, args[:nArg], pArg)
-	fn(Context{db, pCtx}, args[:nArg]...)
+	fn(Context{db, pCtx}, *args...)
 }

 func stepCallback(ctx context.Context, mod api.Module, pCtx, pAgg, pApp ptr_t, nArg int32, pArg ptr_t) {
-	args := getFuncArgs()
-	defer putFuncArgs(args)
 	db := ctx.Value(connKey{}).(*Conn)
-	callbackArgs(db, args[:nArg], pArg)
+	args := callbackArgs(db, nArg, pArg)
+	defer returnArgs(args)
 	fn, _ := callbackAggregate(db, pAgg, pApp)
-	fn.Step(Context{db, pCtx}, args[:nArg]...)
+	fn.Step(Context{db, pCtx}, *args...)
 }

 func valueCallback(ctx context.Context, mod api.Module, pCtx, pAgg, pApp ptr_t, final int32) {
@@ -196,12 +233,11 @@ func valueCallback(ctx context.Context, mod api.Module, pCtx, pAgg, pApp ptr_t,
 }

 func inverseCallback(ctx context.Context, mod api.Module, pCtx, pAgg ptr_t, nArg int32, pArg ptr_t) {
-	args := getFuncArgs()
-	defer putFuncArgs(args)
 	db := ctx.Value(connKey{}).(*Conn)
-	callbackArgs(db, args[:nArg], pArg)
+	args := callbackArgs(db, nArg, pArg)
+	defer returnArgs(args)
 	fn := util.GetHandle(db.ctx, pAgg).(WindowFunction)
-	fn.Inverse(Context{db, pCtx}, args[:nArg]...)
+	fn.Inverse(Context{db, pCtx}, *args...)
 }

 func callbackAggregate(db *Conn, pAgg, pApp ptr_t) (AggregateFunction, ptr_t) {
@@ -211,7 +247,7 @@ func callbackAggregate(db *Conn, pAgg, pApp ptr_t) (AggregateFunction, ptr_t) {
 	}

 	// We need to create the aggregate.
-	fn := util.GetHandle(db.ctx, pApp).(func() AggregateFunction)()
+	fn := util.GetHandle(db.ctx, pApp).(AggregateConstructor)()
 	if pAgg != 0 {
 		handle := util.AddHandle(db.ctx, fn)
 		util.Write32(db.mod, pAgg, handle)
@@ -220,25 +256,54 @@ func callbackAggregate(db *Conn, pAgg, pApp ptr_t) (AggregateFunction, ptr_t) {
 	return fn, 0
 }

-func callbackArgs(db *Conn, arg []Value, pArg ptr_t) {
-	for i := range arg {
-		arg[i] = Value{
+var (
+	valueArgsPool sync.Pool
+	valueArgsLen  atomic.Int32
+)
+
+func callbackArgs(db *Conn, nArg int32, pArg ptr_t) *[]Value {
+	arg, ok := valueArgsPool.Get().(*[]Value)
+	if !ok || cap(*arg) < int(nArg) {
+		max := valueArgsLen.Or(nArg) | nArg
+		lst := make([]Value, max)
+		arg = &lst
+	}
+	lst := (*arg)[:nArg]
+	for i := range lst {
+		lst[i] = Value{
 			c:      db,
 			handle: util.Read32[ptr_t](db.mod, pArg+ptr_t(i)*ptrlen),
 		}
 	}
+	*arg = lst
+	return arg
 }

-var funcArgsPool sync.Pool
-
-func putFuncArgs(p *[_MAX_FUNCTION_ARG]Value) {
-	funcArgsPool.Put(p)
+func returnArgs(p *[]Value) {
+	valueArgsPool.Put(p)
 }

-func getFuncArgs() *[_MAX_FUNCTION_ARG]Value {
-	if p := funcArgsPool.Get(); p == nil {
-		return new([_MAX_FUNCTION_ARG]Value)
-	} else {
-		return p.(*[_MAX_FUNCTION_ARG]Value)
+type aggregateFunc struct {
+	next func() (struct{}, bool)
+	stop func()
+	ctx  Context
+	arg  []Value
+}
+
+func (a *aggregateFunc) Step(ctx Context, arg ...Value) {
+	a.ctx = ctx
+	a.arg = append(a.arg[:0], arg...)
+	if _, more := a.next(); !more {
+		a.stop()
 	}
 }
+
+func (a *aggregateFunc) Value(ctx Context) {
+	a.ctx = ctx
+	a.stop()
+}
+
+func (a *aggregateFunc) Close() error {
+	a.stop()
+	return nil
+}
--- a/func_seq_test.go
+++ b/func_seq_test.go
@@ -0,0 +1,57 @@
+package sqlite3_test
+
+import (
+	"fmt"
+	"iter"
+	"log"
+
+	"github.com/ncruces/go-sqlite3"
+	_ "github.com/ncruces/go-sqlite3/embed"
+)
+
+func ExampleConn_CreateAggregateFunction() {
+	db, err := sqlite3.Open(":memory:")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	err = db.Exec(`CREATE TABLE test (col)`)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	err = db.Exec(`INSERT INTO test VALUES (1), (2), (3)`)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	err = db.CreateAggregateFunction("seq_avg", 1, sqlite3.DETERMINISTIC|sqlite3.INNOCUOUS,
+		func(ctx *sqlite3.Context, seq iter.Seq[[]sqlite3.Value]) {
+			count := 0
+			total := 0.0
+			for arg := range seq {
+				total += arg[0].Float()
+				count++
+			}
+			ctx.ResultFloat(total / float64(count))
+		})
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	stmt, _, err := db.Prepare(`SELECT seq_avg(col) FROM test`)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer stmt.Close()
+
+	for stmt.Step() {
+		fmt.Println(stmt.ColumnFloat(0))
+	}
+	if err := stmt.Err(); err != nil {
+		log.Fatal(err)
+	}
+	// Output:
+	// 2
+}
--- a/go.mod
+++ b/go.mod
@@ -1,23 +1,22 @@
 module github.com/ncruces/go-sqlite3

-go 1.23.0
-
-toolchain go1.24.0
+go 1.24.0

 require (
 	github.com/ncruces/julianday v1.0.0
-	github.com/ncruces/sort v0.1.5
-	github.com/tetratelabs/wazero v1.9.0
-	golang.org/x/crypto v0.35.0
-	golang.org/x/sys v0.30.0
+	github.com/ncruces/sort v0.1.6
+	github.com/ncruces/wbt v0.2.0
+	github.com/tetratelabs/wazero v1.10.0
+	golang.org/x/sys v0.38.0
 )

 require (
 	github.com/dchest/siphash v1.2.3 // ext/bloom
 	github.com/google/uuid v1.6.0 // ext/uuid
 	github.com/psanford/httpreadat v0.1.0 // example
-	golang.org/x/sync v0.11.0 // test
-	golang.org/x/text v0.22.0 // ext/unicode
+	golang.org/x/crypto v0.43.0 // vfs/adiantum vfs/xts
+	golang.org/x/sync v0.17.0 // test
+	golang.org/x/text v0.30.0 // ext/unicode
 	lukechampine.com/adiantum v1.1.1 // vfs/adiantum
 )

--- a/go.sum
+++ b/go.sum
@@ -4,19 +4,21 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/ncruces/julianday v1.0.0 h1:fH0OKwa7NWvniGQtxdJRxAgkBMolni2BjDHaWTxqt7M=
 github.com/ncruces/julianday v1.0.0/go.mod h1:Dusn2KvZrrovOMJuOt0TNXL6tB7U2E8kvza5fFc9G7g=
-github.com/ncruces/sort v0.1.5 h1:fiFWXXAqKI8QckPf/6hu/bGFwcEPrirIOFaJqWujs4k=
-github.com/ncruces/sort v0.1.5/go.mod h1:obJToO4rYr6VWP0Uw5FYymgYGt3Br4RXcs/JdKaXAPk=
+github.com/ncruces/sort v0.1.6 h1:TrsJfGRH1AoWoaeB4/+gCohot9+cA6u/INaH5agIhNk=
+github.com/ncruces/sort v0.1.6/go.mod h1:obJToO4rYr6VWP0Uw5FYymgYGt3Br4RXcs/JdKaXAPk=
+github.com/ncruces/wbt v0.2.0 h1:Q9zlKOBSZc7Yy/R2cGa35g6RKUUE3BjNIW3tfGC4F04=
+github.com/ncruces/wbt v0.2.0/go.mod h1:DtF92amvMxH69EmBFUSFWRDAlo6hOEfoNQnClxj9C/c=
 github.com/psanford/httpreadat v0.1.0 h1:VleW1HS2zO7/4c7c7zNl33fO6oYACSagjJIyMIwZLUE=
 github.com/psanford/httpreadat v0.1.0/go.mod h1:Zg7P+TlBm3bYbyHTKv/EdtSJZn3qwbPwpfZ/I9GKCRE=
-github.com/tetratelabs/wazero v1.9.0 h1:IcZ56OuxrtaEz8UYNRHBrUa9bYeX9oVY93KspZZBf/I=
-github.com/tetratelabs/wazero v1.9.0/go.mod h1:TSbcXCfFP0L2FGkRPxHphadXPjo1T6W+CseNNY7EkjM=
-golang.org/x/crypto v0.35.0 h1:b15kiHdrGCHrP6LvwaQ3c03kgNhhiMgvlhxHQhmg2Xs=
-golang.org/x/crypto v0.35.0/go.mod h1:dy7dXNW32cAb/6/PRuTNsix8T+vJAqvuIy5Bli/x0YQ=
-golang.org/x/sync v0.11.0 h1:GGz8+XQP4FvTTrjZPzNKTMFtSXH80RAzG+5ghFPgK9w=
-golang.org/x/sync v0.11.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
-golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
-golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
+github.com/tetratelabs/wazero v1.10.0 h1:CXP3zneLDl6J4Zy8N/J+d5JsWKfrjE6GtvVK1fpnDlk=
+github.com/tetratelabs/wazero v1.10.0/go.mod h1:DRm5twOQ5Gr1AoEdSi0CLjDQF1J9ZAuyqFIjl1KKfQU=
+golang.org/x/crypto v0.43.0 h1:dduJYIi3A3KOfdGOHX8AVZ/jGiyPa3IbBozJ5kNuE04=
+golang.org/x/crypto v0.43.0/go.mod h1:BFbav4mRNlXJL4wNeejLpWxB7wMbc79PdRGhWKncxR0=
+golang.org/x/sync v0.17.0 h1:l60nONMj9l5drqw6jlhIELNv9I0A4OFgRsG9k2oT9Ug=
+golang.org/x/sync v0.17.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
+golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/text v0.30.0 h1:yznKA/E9zq54KzlzBEAWn1NXSQ8DIp/NYMy88xJjl4k=
+golang.org/x/text v0.30.0/go.mod h1:yDdHFIX9t+tORqspjENWgzaCVXgk0yYnYuSZ8UzzBVM=
 lukechampine.com/adiantum v1.1.1 h1:4fp6gTxWCqpEbLy40ExiYDDED3oUNWx5cTqBCtPdZqA=
 lukechampine.com/adiantum v1.1.1/go.mod h1:LrAYVnTYLnUtE/yMp5bQr0HstAf060YUF8nM0B6+rUw=
--- a/gormlite/ddlmod.go
+++ b/gormlite/ddlmod.go
@@ -209,8 +209,12 @@ func (d *ddl) renameTable(dst, src string) error {
 	return nil
 }

+func compileConstraintRegexp(name string) *regexp.Regexp {
+	return regexp.MustCompile("^(?i:CONSTRAINT)\\s+[\"`]?" + regexp.QuoteMeta(name) + "[\"`\\s]")
+}
+
 func (d *ddl) addConstraint(name string, sql string) {
-	reg := regexp.MustCompile("^CONSTRAINT [\"`]?" + regexp.QuoteMeta(name) + "[\"` ]")
+	reg := compileConstraintRegexp(name)

 	for i := 0; i < len(d.fields); i++ {
 		if reg.MatchString(d.fields[i]) {
@@ -223,7 +227,7 @@ func (d *ddl) addConstraint(name string, sql string) {
 }

 func (d *ddl) removeConstraint(name string) bool {
-	reg := regexp.MustCompile("^CONSTRAINT [\"`]?" + regexp.QuoteMeta(name) + "[\"` ]")
+	reg := compileConstraintRegexp(name)

 	for i := 0; i < len(d.fields); i++ {
 		if reg.MatchString(d.fields[i]) {
@@ -236,7 +240,7 @@ func (d *ddl) removeConstraint(name string) bool {

 //lint:ignore U1000 ignore unused code.
 func (d *ddl) hasConstraint(name string) bool {
-	reg := regexp.MustCompile("^CONSTRAINT [\"`]?" + regexp.QuoteMeta(name) + "[\"` ]")
+	reg := compileConstraintRegexp(name)

 	for _, f := range d.fields {
 		if reg.MatchString(f) {
--- a/gormlite/ddlmod_parse_all_columns.go
+++ b/gormlite/ddlmod_parse_all_columns.go
@@ -95,7 +95,7 @@ func parseAllColumns(in string) ([]string, error) {
 			}
 			return nil, fmt.Errorf("unexpected token: %s", string(s[i]))
 		case parseAllColumnsState_State_End:
-			break
+			continue // avoid SA4011
 		}
 	}
 	if state != parseAllColumnsState_State_End {
--- a/gormlite/ddlmod_test.go
+++ b/gormlite/ddlmod_test.go
@@ -313,6 +313,41 @@ func TestRemoveConstraint(t *testing.T) {
 			success: true,
 			expect:  []string{"`id` integer NOT NULL"},
 		},
+		{
+			name:    "lowercase",
+			fields:  []string{"`id` integer NOT NULL", "constraint `fk_users_notes` FOREIGN KEY (`user_id`) REFERENCES `users`(`id`))"},
+			cName:   "fk_users_notes",
+			success: true,
+			expect:  []string{"`id` integer NOT NULL"},
+		},
+		{
+			name:    "mixed_case",
+			fields:  []string{"`id` integer NOT NULL", "cOnsTraiNT `fk_users_notes` FOREIGN KEY (`user_id`) REFERENCES `users`(`id`))"},
+			cName:   "fk_users_notes",
+			success: true,
+			expect:  []string{"`id` integer NOT NULL"},
+		},
+		{
+			name:    "newline",
+			fields:  []string{"`id` integer NOT NULL", "CONSTRAINT `fk_users_notes`\nFOREIGN KEY (`user_id`) REFERENCES `users`(`id`))"},
+			cName:   "fk_users_notes",
+			success: true,
+			expect:  []string{"`id` integer NOT NULL"},
+		},
+		{
+			name:    "lots_of_newlines",
+			fields:  []string{"`id` integer NOT NULL", "constraint \n    fk_users_notes \n   FOREIGN KEY (`user_id`) REFERENCES `users`(`id`))"},
+			cName:   "fk_users_notes",
+			success: true,
+			expect:  []string{"`id` integer NOT NULL"},
+		},
+		{
+			name:    "no_backtick",
+			fields:  []string{"`id` integer NOT NULL", "CONSTRAINT fk_users_notes FOREIGN KEY (`user_id`) REFERENCES `users`(`id`))"},
+			cName:   "fk_users_notes",
+			success: true,
+			expect:  []string{"`id` integer NOT NULL"},
+		},
 		{
 			name:    "check",
 			fields:  []string{"CONSTRAINT `name_checker` CHECK (`name` <> 'thetadev')", "`id` integer NOT NULL"},
--- a/gormlite/go.mod
+++ b/gormlite/go.mod
@@ -1,19 +1,17 @@
 module github.com/ncruces/go-sqlite3/gormlite

-go 1.23.0
-
-toolchain go1.24.0
+go 1.24.0

 require (
-	github.com/ncruces/go-sqlite3 v0.23.1
-	gorm.io/gorm v1.25.12
+	github.com/ncruces/go-sqlite3 v0.30.1
+	gorm.io/gorm v1.31.1
 )

 require (
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
 	github.com/ncruces/julianday v1.0.0 // indirect
-	github.com/tetratelabs/wazero v1.9.0 // indirect
-	golang.org/x/sys v0.30.0 // indirect
-	golang.org/x/text v0.22.0 // indirect
+	github.com/tetratelabs/wazero v1.10.0 // indirect
+	golang.org/x/sys v0.38.0 // indirect
+	golang.org/x/text v0.30.0 // indirect
 )
--- a/gormlite/go.sum
+++ b/gormlite/go.sum
@@ -2,15 +2,15 @@ github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD
 github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
 github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
 github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
-github.com/ncruces/go-sqlite3 v0.23.1 h1:zGAd76q+Tr18z/xKGatUlzBQdjR3J+rexfANUcjAgkY=
-github.com/ncruces/go-sqlite3 v0.23.1/go.mod h1:Xg3FyAZl25HcBSFmcbymdfoTqD7jRnBUmv1jSrbIjdE=
+github.com/ncruces/go-sqlite3 v0.30.1 h1:pHC3YsyRdJv4pCMB4MO1Q2BXw/CAa+Hoj7GSaKtVk+g=
+github.com/ncruces/go-sqlite3 v0.30.1/go.mod h1:UVsWrQaq1qkcal5/vT5lOJnZCVlR5rsThKdwidjFsKc=
 github.com/ncruces/julianday v1.0.0 h1:fH0OKwa7NWvniGQtxdJRxAgkBMolni2BjDHaWTxqt7M=
 github.com/ncruces/julianday v1.0.0/go.mod h1:Dusn2KvZrrovOMJuOt0TNXL6tB7U2E8kvza5fFc9G7g=
-github.com/tetratelabs/wazero v1.9.0 h1:IcZ56OuxrtaEz8UYNRHBrUa9bYeX9oVY93KspZZBf/I=
-github.com/tetratelabs/wazero v1.9.0/go.mod h1:TSbcXCfFP0L2FGkRPxHphadXPjo1T6W+CseNNY7EkjM=
-golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
-golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
-golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
-gorm.io/gorm v1.25.12 h1:I0u8i2hWQItBq1WfE0o2+WuL9+8L21K9e2HHSTE/0f8=
-gorm.io/gorm v1.25.12/go.mod h1:xh7N7RHfYlNc5EmcI/El95gXusucDrQnHXe0+CgWcLQ=
+github.com/tetratelabs/wazero v1.10.0 h1:CXP3zneLDl6J4Zy8N/J+d5JsWKfrjE6GtvVK1fpnDlk=
+github.com/tetratelabs/wazero v1.10.0/go.mod h1:DRm5twOQ5Gr1AoEdSi0CLjDQF1J9ZAuyqFIjl1KKfQU=
+golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
+golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/text v0.30.0 h1:yznKA/E9zq54KzlzBEAWn1NXSQ8DIp/NYMy88xJjl4k=
+golang.org/x/text v0.30.0/go.mod h1:yDdHFIX9t+tORqspjENWgzaCVXgk0yYnYuSZ8UzzBVM=
+gorm.io/gorm v1.31.1 h1:7CA8FTFz/gRfgqgpeKIBcervUn3xSyPUmr6B2WXJ7kg=
+gorm.io/gorm v1.31.1/go.mod h1:XyQVbO2k6YkOis7C2437jSit3SsDK72s7n7rsSHd+Gs=
--- a/gormlite/migrator.go
+++ b/gormlite/migrator.go
@@ -339,7 +339,7 @@ func (m _Migrator) GetIndexes(value interface{}) ([]gorm.Index, error) {
 	indexes := make([]gorm.Index, 0)
 	err := m.RunWithValue(value, func(stmt *gorm.Statement) error {
 		rst := make([]*_Index, 0)
-		if err := m.DB.Debug().Raw("SELECT * FROM PRAGMA_index_list(?)", stmt.Table).Scan(&rst).Error; err != nil { // alias `PRAGMA index_list(?)`
+		if err := m.DB.Raw("SELECT * FROM PRAGMA_index_list(?)", stmt.Table).Scan(&rst).Error; err != nil { // alias `PRAGMA index_list(?)`
 			return err
 		}
 		for _, index := range rst {
--- a/gormlite/sqlite.go
+++ b/gormlite/sqlite.go
@@ -1,4 +1,3 @@
-// Package gormlite provides a GORM driver for SQLite.
 package gormlite

 import (
@@ -52,7 +51,9 @@ func (dialector _Dialector) Initialize(db *gorm.DB) (err error) {
 	})

 	for k, v := range dialector.ClauseBuilders() {
-		db.ClauseBuilders[k] = v
+		if _, ok := db.ClauseBuilders[k]; !ok {
+			db.ClauseBuilders[k] = v
+		}
 	}
 	return
 }
--- a/gormlite/sqlite_test.go
+++ b/gormlite/sqlite_test.go
@@ -14,10 +14,10 @@ import (
 )

 func TestDialector(t *testing.T) {
-	tmp := memdb.TestDB(t)
+	dsn := memdb.TestDB(t)

 	// Custom connection with a custom function called "my_custom_function".
-	db, err := driver.Open(tmp, func(conn *sqlite3.Conn) error {
+	db, err := driver.Open(dsn, func(conn *sqlite3.Conn) error {
 		return conn.CreateFunction("my_custom_function", 0, sqlite3.DETERMINISTIC,
 			func(ctx sqlite3.Context, arg ...sqlite3.Value) {
 				ctx.ResultText("my-result")
@@ -36,14 +36,14 @@ func TestDialector(t *testing.T) {
 	}{
 		{
 			description:  "Default driver",
-			dialector:    Open(tmp),
+			dialector:    Open(dsn),
 			openSuccess:  true,
 			query:        "SELECT 1",
 			querySuccess: true,
 		},
 		{
 			description:  "Custom function",
-			dialector:    Open(tmp),
+			dialector:    Open(dsn),
 			openSuccess:  true,
 			query:        "SELECT my_custom_function()",
 			querySuccess: false,
--- a/gormlite/test.sh
+++ b/gormlite/test.sh
@@ -7,7 +7,7 @@ rm -rf gorm/ tests/
 go work use -r .
 go test

-git clone --branch v1.25.12 --filter=blob:none https://github.com/go-gorm/gorm.git
+git clone --branch v1.31.1 --filter=blob:none https://github.com/go-gorm/gorm.git
 mv gorm/tests tests
 rm -rf gorm/

--- a/gormlite/tests.patch
+++ b/gormlite/tests.patch
@@ -7,13 +7,14 @@ diff --git a/tests/.gitignore b/tests/.gitignore
 diff --git a/tests/tests_test.go b/tests/tests_test.go
 --- a/tests/tests_test.go
 +++ b/tests/tests_test.go
-@@ -7,9 +7,11 @@ import (
+@@ -8,9 +8,11 @@ import (
 	"path/filepath"
 	"time"
 
 +	_ "github.com/ncruces/go-sqlite3/embed"
 +	sqlite "github.com/ncruces/go-sqlite3/gormlite"
 +
+ 	"gorm.io/driver/gaussdb"
 	"gorm.io/driver/mysql"
 	"gorm.io/driver/postgres"
 -	"gorm.io/driver/sqlite"
--- a/gormlite/update.sh
+++ b/gormlite/update.sh
@@ -3,13 +3,12 @@ set -euo pipefail

 cd -P -- "$(dirname -- "$0")"

-curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.5.7/ddlmod.go"
-curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.5.7/ddlmod_test.go"
-curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.5.7/ddlmod_parse_all_columns.go"
-curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.5.7/ddlmod_parse_all_columns_test.go"
-curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.5.7/error_translator.go"
-curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.5.7/migrator.go"
-curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.5.7/sqlite.go"
-curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.5.7/sqlite_test.go"
-curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.5.7/sqlite_test.go"
+curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.6.0/ddlmod.go"
+curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.6.0/ddlmod_test.go"
+curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.6.0/ddlmod_parse_all_columns.go"
+curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.6.0/ddlmod_parse_all_columns_test.go"
+curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.6.0/error_translator.go"
+curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.6.0/migrator.go"
+curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.6.0/sqlite.go"
+curl -#OL "https://github.com/go-gorm/sqlite/raw/v1.6.0/sqlite_test.go"
 curl -#L "https://github.com/glebarez/sqlite/raw/v1.11.0/sqlite_error_translator_test.go" > error_translator_test.go
--- a/internal/alloc/alloc_unix.go
+++ b/internal/alloc/alloc_unix.go
@@ -9,24 +9,31 @@ import (
 	"golang.org/x/sys/unix"
 )

-func NewMemory(_, max uint64) experimental.LinearMemory {
+func NewMemory(cap, max uint64) experimental.LinearMemory {
 	// Round up to the page size.
 	rnd := uint64(unix.Getpagesize() - 1)
-	max = (max + rnd) &^ rnd
+	res := (max + rnd) &^ rnd

-	if max > math.MaxInt {
-		// This ensures int(max) overflows to a negative value,
+	if res > math.MaxInt {
+		// This ensures int(res) overflows to a negative value,
 		// and unix.Mmap returns EINVAL.
-		max = math.MaxUint64
+		res = math.MaxUint64
 	}

-	// Reserve max bytes of address space, to ensure we won't need to move it.
+	com := res
+	prot := unix.PROT_READ | unix.PROT_WRITE
+	if cap < max { // Commit memory only if cap=max.
+		com = 0
+		prot = unix.PROT_NONE
+	}
+
+	// Reserve res bytes of address space, to ensure we won't need to move it.
 	// A protected, private, anonymous mapping should not commit memory.
-	b, err := unix.Mmap(-1, 0, int(max), unix.PROT_NONE, unix.MAP_PRIVATE|unix.MAP_ANON)
+	b, err := unix.Mmap(-1, 0, int(res), prot, unix.MAP_PRIVATE|unix.MAP_ANON)
 	if err != nil {
 		panic(err)
 	}
-	return &mmappedMemory{buf: b[:0]}
+	return &mmappedMemory{buf: b[:com]}
 }

 // The slice covers the entire mmapped memory:
@@ -40,9 +47,11 @@ func (m *mmappedMemory) Reallocate(size uint64) []byte {
 	com := uint64(len(m.buf))
 	res := uint64(cap(m.buf))
 	if com < size && size <= res {
-		// Round up to the page size.
+		// Grow geometrically, round up to the page size.
 		rnd := uint64(unix.Getpagesize() - 1)
-		new := (size + rnd) &^ rnd
+		new := com + com>>3
+		new = min(max(size, new), res)
+		new = (new + rnd) &^ rnd

 		// Commit additional memory up to new bytes.
 		err := unix.Mprotect(m.buf[com:new], unix.PROT_READ|unix.PROT_WRITE)
@@ -50,8 +59,7 @@ func (m *mmappedMemory) Reallocate(size uint64) []byte {
 			return nil
 		}

-		// Update committed memory.
-		m.buf = m.buf[:new]
+		m.buf = m.buf[:new] // Update committed memory.
 	}
 	// Limit returned capacity because bytes beyond
 	// len(m.buf) have not yet been committed.
--- a/internal/alloc/alloc_windows.go
+++ b/internal/alloc/alloc_windows.go
@@ -9,20 +9,26 @@ import (
 	"golang.org/x/sys/windows"
 )

-func NewMemory(_, max uint64) experimental.LinearMemory {
+func NewMemory(cap, max uint64) experimental.LinearMemory {
 	// Round up to the page size.
 	rnd := uint64(windows.Getpagesize() - 1)
-	max = (max + rnd) &^ rnd
+	res := (max + rnd) &^ rnd

-	if max > math.MaxInt {
-		// This ensures uintptr(max) overflows to a large value,
+	if res > math.MaxInt {
+		// This ensures uintptr(res) overflows to a large value,
 		// and windows.VirtualAlloc returns an error.
-		max = math.MaxUint64
+		res = math.MaxUint64
 	}

-	// Reserve max bytes of address space, to ensure we won't need to move it.
-	// This does not commit memory.
-	r, err := windows.VirtualAlloc(0, uintptr(max), windows.MEM_RESERVE, windows.PAGE_READWRITE)
+	com := res
+	kind := windows.MEM_COMMIT
+	if cap < max { // Commit memory only if cap=max.
+		com = 0
+		kind = windows.MEM_RESERVE
+	}
+
+	// Reserve res bytes of address space, to ensure we won't need to move it.
+	r, err := windows.VirtualAlloc(0, uintptr(res), uint32(kind), windows.PAGE_READWRITE)
 	if err != nil {
 		panic(err)
 	}
@@ -30,8 +36,9 @@ func NewMemory(_, max uint64) experimental.LinearMemory {
 	mem := virtualMemory{addr: r}
 	// SliceHeader, although deprecated, avoids a go vet warning.
 	sh := (*reflect.SliceHeader)(unsafe.Pointer(&mem.buf))
-	sh.Cap = int(max)
 	sh.Data = r
+	sh.Len = int(com)
+	sh.Cap = int(res)
 	return &mem
 }

@@ -47,9 +54,11 @@ func (m *virtualMemory) Reallocate(size uint64) []byte {
 	com := uint64(len(m.buf))
 	res := uint64(cap(m.buf))
 	if com < size && size <= res {
-		// Round up to the page size.
+		// Grow geometrically, round up to the page size.
 		rnd := uint64(windows.Getpagesize() - 1)
-		new := (size + rnd) &^ rnd
+		new := com + com>>3
+		new = min(max(size, new), res)
+		new = (new + rnd) &^ rnd

 		// Commit additional memory up to new bytes.
 		_, err := windows.VirtualAlloc(m.addr, uintptr(new), windows.MEM_COMMIT, windows.PAGE_READWRITE)
@@ -57,8 +66,7 @@ func (m *virtualMemory) Reallocate(size uint64) []byte {
 			return nil
 		}

-		// Update committed memory.
-		m.buf = m.buf[:new]
+		m.buf = m.buf[:new] // Update committed memory.
 	}
 	// Limit returned capacity because bytes beyond
 	// len(m.buf) have not yet been committed.
--- a/internal/util/const.go
+++ b/internal/util/const.go
@@ -39,6 +39,9 @@ const (
 	ERROR_MISSING_COLLSEQ   = ERROR | (1 << 8)
 	ERROR_RETRY             = ERROR | (2 << 8)
 	ERROR_SNAPSHOT          = ERROR | (3 << 8)
+	ERROR_RESERVESIZE       = ERROR | (4 << 8)
+	ERROR_KEY               = ERROR | (5 << 8)
+	ERROR_UNABLE            = ERROR | (6 << 8)
 	IOERR_READ              = IOERR | (1 << 8)
 	IOERR_SHORT_READ        = IOERR | (2 << 8)
 	IOERR_WRITE             = IOERR | (3 << 8)
@@ -73,6 +76,8 @@ const (
 	IOERR_DATA              = IOERR | (32 << 8)
 	IOERR_CORRUPTFS         = IOERR | (33 << 8)
 	IOERR_IN_PAGE           = IOERR | (34 << 8)
+	IOERR_BADKEY            = IOERR | (35 << 8)
+	IOERR_CODEC             = IOERR | (36 << 8)
 	LOCKED_SHAREDCACHE      = LOCKED | (1 << 8)
 	LOCKED_VTAB             = LOCKED | (2 << 8)
 	BUSY_RECOVERY           = BUSY | (1 << 8)
--- a/internal/util/error.go
+++ b/internal/util/error.go
@@ -33,8 +33,12 @@ func AssertErr() ErrorString {
 	return ErrorString(msg)
 }

-func ErrorCodeString(rc uint32) string {
-	switch rc {
+type errorCode interface {
+	~uint8 | ~uint16 | ~uint32 | ~int32
+}
+
+func ErrorCodeString[T errorCode](rc T) string {
+	switch uint32(rc) {
 	case ABORT_ROLLBACK:
 		return "sqlite3: abort due to ROLLBACK"
 	case ROW:
@@ -42,7 +46,7 @@ func ErrorCodeString(rc uint32) string {
 	case DONE:
 		return "sqlite3: no more rows available"
 	}
-	switch rc & 0xff {
+	switch uint8(rc) {
 	case OK:
 		return "sqlite3: not an error"
 	case ERROR:
@@ -75,7 +79,7 @@ func ErrorCodeString(rc uint32) string {
 		return "sqlite3: unable to open database file"
 	case PROTOCOL:
 		return "sqlite3: locking protocol"
-	case FORMAT:
+	case EMPTY:
 		break
 	case SCHEMA:
 		return "sqlite3: database schema has changed"
@@ -91,7 +95,7 @@ func ErrorCodeString(rc uint32) string {
 		break
 	case AUTH:
 		return "sqlite3: authorization denied"
-	case EMPTY:
+	case FORMAT:
 		break
 	case RANGE:
 		return "sqlite3: column index out of range"
--- a/internal/util/func.go
+++ b/internal/util/func.go
@@ -20,20 +20,6 @@ func ExportFuncVI[T0 i32](mod wazero.HostModuleBuilder, name string, fn func(con
 		Export(name)
 }

-type funcVII[T0, T1 i32] func(context.Context, api.Module, T0, T1)
-
-func (fn funcVII[T0, T1]) Call(ctx context.Context, mod api.Module, stack []uint64) {
-	_ = stack[1] // prevent bounds check on every slice access
-	fn(ctx, mod, T0(stack[0]), T1(stack[1]))
-}
-
-func ExportFuncVII[T0, T1 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1)) {
-	mod.NewFunctionBuilder().
-		WithGoModuleFunction(funcVII[T0, T1](fn),
-			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32}, nil).
-		Export(name)
-}
-
 type funcVIII[T0, T1, T2 i32] func(context.Context, api.Module, T0, T1, T2)

 func (fn funcVIII[T0, T1, T2]) Call(ctx context.Context, mod api.Module, stack []uint64) {
--- a/internal/util/json.go
+++ b/internal/util/json.go
@@ -1,3 +1,5 @@
+//go:build !goexperiment.jsonv2
+
 package util

 import (
--- a/internal/util/json_v2.go
+++ b/internal/util/json_v2.go
@@ -0,0 +1,52 @@
+//go:build goexperiment.jsonv2
+
+package util
+
+import (
+	"encoding/json/v2"
+	"math"
+	"strconv"
+	"time"
+	"unsafe"
+)
+
+type JSON struct{ Value any }
+
+func (j JSON) Scan(value any) error {
+	var buf []byte
+
+	switch v := value.(type) {
+	case []byte:
+		buf = v
+	case string:
+		buf = unsafe.Slice(unsafe.StringData(v), len(v))
+	case int64:
+		buf = strconv.AppendInt(nil, v, 10)
+	case float64:
+		buf = AppendNumber(nil, v)
+	case time.Time:
+		buf = append(buf, '"')
+		buf = v.AppendFormat(buf, time.RFC3339Nano)
+		buf = append(buf, '"')
+	case nil:
+		buf = []byte("null")
+	default:
+		panic(AssertErr())
+	}
+
+	return json.Unmarshal(buf, j.Value)
+}
+
+func AppendNumber(dst []byte, f float64) []byte {
+	switch {
+	case math.IsNaN(f):
+		dst = append(dst, "null"...)
+	case math.IsInf(f, 1):
+		dst = append(dst, "9.0e999"...)
+	case math.IsInf(f, -1):
+		dst = append(dst, "-9.0e999"...)
+	default:
+		return strconv.AppendFloat(dst, f, 'g', -1, 64)
+	}
+	return dst
+}
--- a/internal/util/mem.go
+++ b/internal/util/mem.go
@@ -135,11 +135,10 @@ func ReadString(mod api.Module, ptr Ptr_t, maxlen int64) string {
 			panic(RangeErr)
 		}
 	}
-	if i := bytes.IndexByte(buf, 0); i < 0 {
-		panic(NoNulErr)
-	} else {
+	if i := bytes.IndexByte(buf, 0); i >= 0 {
 		return string(buf[:i])
 	}
+	panic(NoNulErr)
 }

 func WriteBytes(mod api.Module, ptr Ptr_t, b []byte) {
--- a/internal/util/mmap_windows.go
+++ b/internal/util/mmap_windows.go
@@ -1,12 +1,10 @@
 package util

 import (
-	"context"
 	"os"
 	"reflect"
 	"unsafe"

-	"github.com/tetratelabs/wazero/api"
 	"golang.org/x/sys/windows"
 )

@@ -16,14 +14,21 @@ type MappedRegion struct {
 	addr uintptr
 }

-func MapRegion(ctx context.Context, mod api.Module, f *os.File, offset int64, size int32) (*MappedRegion, error) {
-	h, err := windows.CreateFileMapping(windows.Handle(f.Fd()), nil, windows.PAGE_READWRITE, 0, 0, nil)
+func MapRegion(f *os.File, offset int64, size int32) (*MappedRegion, error) {
+	maxSize := offset + int64(size)
+	h, err := windows.CreateFileMapping(
+		windows.Handle(f.Fd()), nil, windows.PAGE_READWRITE,
+		uint32(maxSize>>32), uint32(maxSize), nil)
 	if h == 0 {
 		return nil, err
 	}

+	const allocationGranularity = 64 * 1024
+	align := offset % allocationGranularity
+	offset -= align
+
 	a, err := windows.MapViewOfFile(h, windows.FILE_MAP_WRITE,
-		uint32(offset>>32), uint32(offset), uintptr(size))
+		uint32(offset>>32), uint32(offset), uintptr(size)+uintptr(align))
 	if a == 0 {
 		windows.CloseHandle(h)
 		return nil, err
@@ -32,9 +37,9 @@ func MapRegion(ctx context.Context, mod api.Module, f *os.File, offset int64, si
 	ret := &MappedRegion{Handle: h, addr: a}
 	// SliceHeader, although deprecated, avoids a go vet warning.
 	sh := (*reflect.SliceHeader)(unsafe.Pointer(&ret.Data))
+	sh.Data = a + uintptr(align)
 	sh.Len = int(size)
 	sh.Cap = int(size)
-	sh.Data = a
 	return ret, nil
 }

--- a/internal/util/module.go
+++ b/internal/util/module.go
@@ -12,6 +12,7 @@ type ConnKey struct{}

 type moduleKey struct{}
 type moduleState struct {
+	sysError error
 	mmapState
 	handleState
 }
@@ -23,3 +24,20 @@ func NewContext(ctx context.Context) context.Context {
 	ctx = context.WithValue(ctx, moduleKey{}, state)
 	return ctx
 }
+
+func GetSystemError(ctx context.Context) error {
+	// Test needed to simplify testing.
+	s, ok := ctx.Value(moduleKey{}).(*moduleState)
+	if ok {
+		return s.sysError
+	}
+	return nil
+}
+
+func SetSystemError(ctx context.Context, err error) {
+	// Test needed to simplify testing.
+	s, ok := ctx.Value(moduleKey{}).(*moduleState)
+	if ok {
+		s.sysError = err
+	}
+}
--- a/internal/util/pointer.go
+++ b/internal/util/pointer.go
@@ -1,11 +1,3 @@
 package util

-type Pointer[T any] struct{ Value T }
-
-func (p Pointer[T]) unwrap() any { return p.Value }
-
-type PointerUnwrap interface{ unwrap() any }
-
-func UnwrapPointer(p PointerUnwrap) any {
-	return p.unwrap()
-}
+type Pointer struct{ Value any }
--- a/internal/util/pointer_test.go
+++ b/internal/util/pointer_test.go
@@ -1,13 +0,0 @@
-package util
-
-import (
-	"math"
-	"testing"
-)
-
-func TestUnwrapPointer(t *testing.T) {
-	p := Pointer[float64]{Value: math.Pi}
-	if got := UnwrapPointer(p); got != math.Pi {
-		t.Errorf("want π, got %v", got)
-	}
-}
--- a/json.go
+++ b/json.go
@@ -1,6 +1,13 @@
+//go:build !goexperiment.jsonv2
+
 package sqlite3

-import "github.com/ncruces/go-sqlite3/internal/util"
+import (
+	"encoding/json"
+	"strconv"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+)

 // JSON returns a value that can be used as an argument to
 // [database/sql.DB.Exec], [database/sql.Row.Scan] and similar methods to
@@ -10,3 +17,77 @@ import "github.com/ncruces/go-sqlite3/internal/util"
 func JSON(value any) any {
 	return util.JSON{Value: value}
 }
+
+// ResultJSON sets the result of the function to the JSON encoding of value.
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultJSON(value any) {
+	err := json.NewEncoder(callbackWriter(func(p []byte) (int, error) {
+		ctx.ResultRawText(p[:len(p)-1]) // remove the newline
+		return 0, nil
+	})).Encode(value)
+
+	if err != nil {
+		ctx.ResultError(err)
+		return // notest
+	}
+}
+
+// BindJSON binds the JSON encoding of value to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindJSON(param int, value any) error {
+	return json.NewEncoder(callbackWriter(func(p []byte) (int, error) {
+		return 0, s.BindRawText(param, p[:len(p)-1]) // remove the newline
+	})).Encode(value)
+}
+
+// ColumnJSON parses the JSON-encoded value of the result column
+// and stores it in the value pointed to by ptr.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnJSON(col int, ptr any) error {
+	var data []byte
+	switch s.ColumnType(col) {
+	case NULL:
+		data = []byte("null")
+	case TEXT:
+		data = s.ColumnRawText(col)
+	case BLOB:
+		data = s.ColumnRawBlob(col)
+	case INTEGER:
+		data = strconv.AppendInt(nil, s.ColumnInt64(col), 10)
+	case FLOAT:
+		data = util.AppendNumber(nil, s.ColumnFloat(col))
+	default:
+		panic(util.AssertErr())
+	}
+	return json.Unmarshal(data, ptr)
+}
+
+// JSON parses a JSON-encoded value
+// and stores the result in the value pointed to by ptr.
+func (v Value) JSON(ptr any) error {
+	var data []byte
+	switch v.Type() {
+	case NULL:
+		data = []byte("null")
+	case TEXT:
+		data = v.RawText()
+	case BLOB:
+		data = v.RawBlob()
+	case INTEGER:
+		data = strconv.AppendInt(nil, v.Int64(), 10)
+	case FLOAT:
+		data = util.AppendNumber(nil, v.Float())
+	default:
+		panic(util.AssertErr())
+	}
+	return json.Unmarshal(data, ptr)
+}
+
+type callbackWriter func(p []byte) (int, error)
+
+func (fn callbackWriter) Write(p []byte) (int, error) { return fn(p) }
--- a/json_v2.go
+++ b/json_v2.go
@@ -0,0 +1,113 @@
+//go:build goexperiment.jsonv2
+
+package sqlite3
+
+import (
+	"encoding/json/v2"
+	"strconv"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+)
+
+// JSON returns a value that can be used as an argument to
+// [database/sql.DB.Exec], [database/sql.Row.Scan] and similar methods to
+// store value as JSON, or decode JSON into value.
+// JSON should NOT be used with [Stmt.BindJSON], [Stmt.ColumnJSON],
+// [Value.JSON], or [Context.ResultJSON].
+func JSON(value any) any {
+	return util.JSON{Value: value}
+}
+
+// ResultJSON sets the result of the function to the JSON encoding of value.
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultJSON(value any) {
+	w := bytesWriter{sqlite: ctx.c.sqlite}
+	if err := json.MarshalWrite(&w, value); err != nil {
+		ctx.c.free(w.ptr)
+		ctx.ResultError(err)
+		return // notest
+	}
+	ctx.c.call("sqlite3_result_text_go",
+		stk_t(ctx.handle), stk_t(w.ptr), stk_t(len(w.buf)))
+}
+
+// BindJSON binds the JSON encoding of value to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindJSON(param int, value any) error {
+	w := bytesWriter{sqlite: s.c.sqlite}
+	if err := json.MarshalWrite(&w, value); err != nil {
+		s.c.free(w.ptr)
+		return err
+	}
+	rc := res_t(s.c.call("sqlite3_bind_text_go",
+		stk_t(s.handle), stk_t(param),
+		stk_t(w.ptr), stk_t(len(w.buf))))
+	return s.c.error(rc)
+}
+
+// ColumnJSON parses the JSON-encoded value of the result column
+// and stores it in the value pointed to by ptr.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnJSON(col int, ptr any) error {
+	var data []byte
+	switch s.ColumnType(col) {
+	case NULL:
+		data = []byte("null")
+	case TEXT:
+		data = s.ColumnRawText(col)
+	case BLOB:
+		data = s.ColumnRawBlob(col)
+	case INTEGER:
+		data = strconv.AppendInt(nil, s.ColumnInt64(col), 10)
+	case FLOAT:
+		data = util.AppendNumber(nil, s.ColumnFloat(col))
+	default:
+		panic(util.AssertErr())
+	}
+	return json.Unmarshal(data, ptr)
+}
+
+// JSON parses a JSON-encoded value
+// and stores the result in the value pointed to by ptr.
+func (v Value) JSON(ptr any) error {
+	var data []byte
+	switch v.Type() {
+	case NULL:
+		data = []byte("null")
+	case TEXT:
+		data = v.RawText()
+	case BLOB:
+		data = v.RawBlob()
+	case INTEGER:
+		data = strconv.AppendInt(nil, v.Int64(), 10)
+	case FLOAT:
+		data = util.AppendNumber(nil, v.Float())
+	default:
+		panic(util.AssertErr())
+	}
+	return json.Unmarshal(data, ptr)
+}
+
+type bytesWriter struct {
+	*sqlite
+	buf []byte
+	ptr ptr_t
+}
+
+func (b *bytesWriter) Write(p []byte) (n int, err error) {
+	if len(p) > cap(b.buf)-len(b.buf) {
+		want := int64(len(b.buf)) + int64(len(p))
+		grow := int64(cap(b.buf))
+		grow += grow >> 1
+		want = max(want, grow)
+		b.ptr = b.realloc(b.ptr, want)
+		b.buf = util.View(b.mod, b.ptr, want)[:len(b.buf)]
+	}
+	b.buf = append(b.buf, p...)
+	return len(p), nil
+}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Nuno Cruces	99b097de3b	Windows ARM runners.	2025-11-09 12:44:32 +00:00
Nuno Cruces	4a956e80a2	wasi-sdk-28.	2025-11-09 01:32:25 +00:00
Nuno Cruces	5f4ff03f6f	wazero v1.10.0.	2025-11-09 01:32:15 +00:00
Nuno Cruces	5890049488	Shim modernc.	2025-11-09 01:32:14 +00:00
Nuno Cruces	5e73c5d714	Issue #330 .	2025-11-06 12:07:37 +00:00
Nuno Cruces	6d92aa16ef	SQLite 3.51.0.	2025-11-05 12:30:09 +00:00
Nuno Cruces	191d1337e7	Gorm v1.31.1.	2025-11-05 12:30:09 +00:00
Nuno Cruces	b65e894849	Improve error reporting. (#327 )	2025-10-17 16:40:15 +01:00
Nuno Cruces	0b040d3f09	Prepare 3.51.0.	2025-10-16 15:18:44 +01:00
Nuno Cruces	1db4366226	VFS error handling.	2025-10-16 15:18:40 +01:00
Nuno Cruces	9e1cbfb5bb	Release snapshot.	2025-10-10 17:37:44 +01:00
dependabot[bot]	7f2d70a0f3	Bump golang.org/x/crypto from 0.42.0 to 0.43.0 (#324 ) Bumps [golang.org/x/crypto](https://github.com/golang/crypto) from 0.42.0 to 0.43.0. - [Commits](https://github.com/golang/crypto/compare/v0.42.0...v0.43.0) --- updated-dependencies: - dependency-name: golang.org/x/crypto dependency-version: 0.43.0 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2025-10-08 23:11:06 +01:00
Nuno Cruces	ea860e407d	Docs.	2025-10-01 11:00:13 +01:00
Nuno Cruces	d4561d08f9	Refactor.	2025-10-01 10:48:54 +01:00
Nuno Cruces	14c1e490b4	Optimize fullfsync.	2025-09-30 12:54:18 +01:00
Nuno Cruces	23aad5f62f	MVCC API.	2025-09-29 12:52:01 +01:00
Nuno Cruces	e5bd10a1ff	Fix TestDB.	2025-09-29 12:44:09 +01:00
Nuno Cruces	5cf06c45f7	Scan improvements.	2025-09-24 18:13:26 +01:00
Nuno Cruces	08f9fc758a	JSON experiment.	2025-09-24 18:13:21 +01:00
Nuno Cruces	b588d5f991	Error messages, test contexts.	2025-09-23 12:51:36 +01:00
Nuno Cruces	4c24bd0cb6	Verify download.	2025-09-23 11:49:59 +01:00
Nuno Cruces	cc353e4848	Time improvements.	2025-09-23 11:49:53 +01:00
Nuno Cruces	c3ebb04045	Use crypto/pbkdf2.	2025-09-18 18:41:10 +01:00
Nuno Cruces	11e064574c	Weight-balanced trees.	2025-09-17 11:01:24 +01:00
Nuno Cruces	770420289a	Updated dependencies.	2025-09-10 17:09:00 +01:00
Nuno Cruces	62f69011f1	Updated dependencies.	2025-09-08 13:59:41 +01:00
Nuno Cruces	4f9e3f900b	binaryen-version_124.	2025-09-08 12:23:58 +01:00
dependabot[bot]	4e90618350	Bump actions/setup-go from 5 to 6 (#318 ) Bumps [actions/setup-go](https://github.com/actions/setup-go) from 5 to 6. - [Release notes](https://github.com/actions/setup-go/releases) - [Commits](https://github.com/actions/setup-go/compare/v5...v6) --- updated-dependencies: - dependency-name: actions/setup-go dependency-version: '6' dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2025-09-05 00:25:35 +02:00
Nuno Cruces	54bb94ce58	Improve WithMemoryCapacityFromMax (#317 ).	2025-09-03 09:03:59 +02:00
Nuno Cruces	07fec784e1	Grow memory geometrically. (#316 )	2025-09-01 12:57:33 +02:00
dependabot[bot]	da4638cbff	Bump actions/attest-build-provenance from 2 to 3 (#313 ) Bumps [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance) from 2 to 3. - [Release notes](https://github.com/actions/attest-build-provenance/releases) - [Changelog](https://github.com/actions/attest-build-provenance/blob/main/RELEASE.md) - [Commits](https://github.com/actions/attest-build-provenance/compare/v2...v3) --- updated-dependencies: - dependency-name: actions/attest-build-provenance dependency-version: '3' dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2025-08-29 00:19:53 +02:00
dependabot[bot]	085872c2f3	Bump github.com/ncruces/aa from 0.3.1 to 0.3.2 (#311 ) Bumps [github.com/ncruces/aa](https://github.com/ncruces/aa) from 0.3.1 to 0.3.2. - [Commits](https://github.com/ncruces/aa/compare/v0.3.1...v0.3.2) --- updated-dependencies: - dependency-name: github.com/ncruces/aa dependency-version: 0.3.2 dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2025-08-26 17:20:13 +02:00
dependabot[bot]	de49aa2b06	Bump github.com/ncruces/aa from 0.3.0 to 0.3.1 (#310 ) Bumps [github.com/ncruces/aa](https://github.com/ncruces/aa) from 0.3.0 to 0.3.1. - [Commits](https://github.com/ncruces/aa/compare/v0.3.0...v0.3.1) --- updated-dependencies: - dependency-name: github.com/ncruces/aa dependency-version: 0.3.1 dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2025-08-23 05:21:11 +01:00
Nuno Cruces	1f3ad0165e	SQLite 3.50.4.	2025-08-21 19:05:44 +01:00
Nuno Cruces	0bda48d1d9	Gorm v1.30.1.	2025-08-21 18:56:05 +01:00
Nuno Cruces	0026bc91aa	MVCC memory VFS. (#309 )	2025-08-21 18:44:40 +01:00
Nuno Cruces	d84ca9d627	Fix #308 .	2025-08-16 19:45:10 +01:00
Nuno Cruces	5d14e01f94	Fix #304 .	2025-08-16 19:27:00 +01:00
Nuno Cruces	342df983d4	Fix #305 .	2025-08-14 23:46:48 +01:00
Nuno Cruces	00476fb1e2	Tests.	2025-08-14 15:04:10 +01:00
Nuno Cruces	8a64ee6eaa	Implement RowsColumnScanner.	2025-08-14 01:42:00 +01:00
Nuno Cruces	8f9a8e2752	Learnings from truffle.	2025-08-13 13:10:50 +01:00
Nuno Cruces	d8880e4cee	Fixes.	2025-08-13 03:34:21 +01:00
dependabot[bot]	4b154a842c	Bump actions/checkout from 4 to 5 (#303 ) Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5. - [Release notes](https://github.com/actions/checkout/releases) - [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md) - [Commits](https://github.com/actions/checkout/compare/v4...v5) --- updated-dependencies: - dependency-name: actions/checkout dependency-version: '5' dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2025-08-12 08:47:41 +01:00
dependabot[bot]	758a53e9bf	Bump golang.org/x/crypto from 0.40.0 to 0.41.0 (#300 ) Bumps [golang.org/x/crypto](https://github.com/golang/crypto) from 0.40.0 to 0.41.0. - [Commits](https://github.com/golang/crypto/compare/v0.40.0...v0.41.0) --- updated-dependencies: - dependency-name: golang.org/x/crypto dependency-version: 0.41.0 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2025-08-08 00:30:25 +01:00
Nuno Cruces	1a42b4c590	Better fuzzing.	2025-08-07 16:27:45 +01:00
Nuno Cruces	7e4ec1df1c	Fix #299 .	2025-08-07 01:52:01 +01:00
Nuno Cruces	2c582a1d66	VFS improvements.	2025-08-05 14:15:21 +01:00
Nuno Cruces	20a67ca669	WAL mode serdes.	2025-08-02 11:48:37 +01:00
Nuno Cruces	789e2dc136	wasi-sdk-27.	2025-07-29 16:50:07 +01:00
Nuno Cruces	0399f10c06	VFS improvements.	2025-07-23 09:57:53 +01:00
Nuno Cruces	75c6744b5b	FreeBSD 14.3.	2025-07-22 23:47:22 +01:00
Nuno Cruces	754e806164	Tests.	2025-07-22 10:34:30 +01:00
Nuno Cruces	2640c9fb54	SQLite 3.50.3.	2025-07-17 19:42:01 +01:00
Nuno Cruces	9719d4b0e3	Better tests.	2025-07-17 01:11:16 +01:00
Nuno Cruces	b21c69dc1f	Fix mode.	2025-07-17 00:50:39 +01:00
Nuno Cruces	b0f8ff44a5	Support subtype.	2025-07-17 00:47:04 +01:00
Nuno Cruces	f37bca6a80	Speedup memdb.	2025-07-15 23:08:41 +01:00
Nuno Cruces	b4e8fcb752	Avoid UB.	2025-07-15 15:52:39 +01:00
dependabot[bot]	14b98a5d05	Bump golang.org/x/crypto from 0.39.0 to 0.40.0 (#295 ) Bumps [golang.org/x/crypto](https://github.com/golang/crypto) from 0.39.0 to 0.40.0. - [Commits](https://github.com/golang/crypto/compare/v0.39.0...v0.40.0) --- updated-dependencies: - dependency-name: golang.org/x/crypto dependency-version: 0.40.0 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2025-07-11 00:30:01 +01:00
Nuno Cruces	36a62264f9	Remove unneeded generics.	2025-07-10 13:05:55 +01:00
Nuno Cruces	33ea564f38	Deps.	2025-07-10 00:50:14 +01:00
Nuno Cruces	5c55d8692f	Fix bitset.	2025-07-04 17:10:40 +01:00
Nuno Cruces	be2f3036b4	SQLite 3.50.2.	2025-06-30 12:29:54 +01:00
Nuno Cruces	784f82f42f	Avoid UB.	2025-06-25 15:27:11 +01:00
Nuno Cruces	cd6ba43e77	Less SIMD.	2025-06-24 02:23:54 +01:00
Nuno Cruces	d7aef63844	Naming, volatile.	2025-06-20 12:45:42 +01:00
Nuno Cruces	64e5046f10	Improved byteset search.	2025-06-17 11:36:53 +01:00
Nuno Cruces	0bdce8aa68	Avoid overflow.	2025-06-12 15:12:20 +01:00
Nuno Cruces	69a2881a10	SQLite 3.50.1.	2025-06-08 00:38:01 +01:00
dependabot[bot]	24ad4445f1	Bump golang.org/x/crypto from 0.38.0 to 0.39.0 (#285 ) Bumps [golang.org/x/crypto](https://github.com/golang/crypto) from 0.38.0 to 0.39.0. - [Commits](https://github.com/golang/crypto/compare/v0.38.0...v0.39.0) --- updated-dependencies: - dependency-name: golang.org/x/crypto dependency-version: 0.39.0 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2025-06-05 23:49:59 +01:00
Nuno Cruces	c159bbd88f	Docs, tweaks.	2025-06-04 12:19:01 +01:00
Nuno Cruces	c90f8205f7	Remove.	2025-06-03 12:54:56 +01:00
Nuno Cruces	b64b9b0415	Better `strcasestr`.	2025-06-02 10:25:10 +01:00
Nuno Cruces	9142e19d61	SQLite 3.50.0.	2025-05-31 01:14:16 +01:00
Daenney	4a76f2b064	README: Make the testing section simpler to read (#282 )	2025-05-30 14:29:34 +01:00
Nuno Cruces	c9b364507e	Avoid copy, alloc.	2025-05-27 11:35:43 +01:00
Nuno Cruces	2204b96ff6	Gorm.	2025-05-27 10:51:42 +01:00
Nuno Cruces	b46f480d79	FCNTL_NULL_IO.	2025-05-26 16:32:52 +01:00
Nuno Cruces	040a026925	More examples.	2025-05-26 12:26:14 +01:00
Michael Lynch	e678040a4e	Remove duplicate link to 'custom VFSes' in README (#279 )	2025-05-26 11:49:03 +01:00
Michael Lynch	f1cc12569c	Link to example of incremental BLOB I/O usage (#280 )	2025-05-26 11:48:53 +01:00
Nuno Cruces	721a987e0e	Line numbers.	2025-05-26 11:48:02 +01:00
Michael Lynch	f3d65142cc	Use sql.Named to clarify the blobio example (#281 ) I find the example SQL queries a bit difficult to read at the callsite with the magic numbers and ? placeholders. I think sql.Named makes it more obvious to the reader what the different parts of the SQL query represent.	2025-05-25 19:02:19 +01:00
Nuno Cruces	93f711c77b	More fuzzing.	2025-05-21 11:36:56 +01:00
Nuno Cruces	341bd063e8	More fuzzing.	2025-05-21 08:16:52 +01:00
Nuno Cruces	f765882670	Sunday's Quick Search.	2025-05-17 13:20:11 +01:00
Nuno Cruces	ff3676ff4a	Case insensitive search, fixes.	2025-05-16 13:10:03 +01:00
Nuno Cruces	54877a53cd	Differential fuzzing.	2025-05-15 14:55:34 +01:00
Nuno Cruces	fccc6c10a7	Issue #277 .	2025-05-14 13:46:01 +01:00
Nuno Cruces	fc21ffcc71	Tweaks.	2025-05-14 01:10:44 +01:00
Nuno Cruces	687e643d7a	Case insensitive compare.	2025-05-13 18:12:14 +01:00
Nuno Cruces	fc5ced209c	Fix `bcmp`.	2025-05-13 14:28:21 +01:00
Nuno Cruces	c1bed07e3a	Issue #276 .	2025-05-13 14:27:04 +01:00
Nuno Cruces	a0771f2363	Relaxed SIMD.	2025-05-12 17:30:32 +01:00
Nuno Cruces	6bad547d3d	Unknown haystack length.	2025-05-12 12:00:06 +01:00
Nuno Cruces	c2c1aea578	Handle repetitive needles.	2025-05-10 01:44:25 +01:00
Nuno Cruces	60ab485b29	Comments.	2025-05-09 14:21:23 +01:00
Nuno Cruces	e17a432fde	Adds `strstr` and `memmem`. (#275 )	2025-05-09 00:59:39 +01:00
Nuno Cruces	c780ef16e2	SQLite 3.49.2.	2025-05-07 14:08:18 +01:00
Nuno Cruces	b609930142	Refactor #274 .	2025-05-07 12:46:13 +01:00
Nuno Cruces	fd165ce724	Issue #274 .	2025-05-07 01:37:52 +01:00
Nuno Cruces	d3973b23e3	More `memcmp`.	2025-05-06 15:48:58 +01:00
Nuno Cruces	320b68e74f	More tests.	2025-05-05 14:47:43 +01:00
Nuno Cruces	2c3850e5d1	Reuse fast funcs.	2025-05-03 01:18:10 +01:00
Nuno Cruces	db7aacff9f	Add `strrchr`.	2025-05-02 14:35:14 +01:00
Nuno Cruces	d748d98e39	Fix.	2025-05-01 12:49:38 +01:00
Nuno Cruces	13b8642384	Compile as C++.	2025-04-29 14:03:59 +01:00
Nuno Cruces	29c5c816cb	More libc.	2025-04-27 23:35:13 +01:00
Nuno Cruces	b32db76da6	Fix flake.	2025-04-25 00:40:52 +01:00
Nuno Cruces	383f620a1e	Action permissions.	2025-04-25 00:28:03 +01:00
Nuno Cruces	a3c3515e96	Update binaries.	2025-04-25 00:20:26 +01:00
Nuno Cruces	e580f080b9	Test libc.	2025-04-24 23:59:53 +01:00
Nuno Cruces	9ea7099c24	Size optimized versions.	2025-04-24 23:17:30 +01:00
Nuno Cruces	29aa365806	Fix.	2025-04-24 00:41:48 +01:00
Nuno Cruces	bb87a920f7	Fix `memchr`.	2025-04-22 02:27:50 +01:00
Nuno Cruces	48379336dc	Improve `strspn`.	2025-04-21 18:59:20 +01:00
Nuno Cruces	251a92fa1a	Weak symbols.	2025-04-18 14:50:57 +01:00
Nuno Cruces	f5206ea8da	Shellsort.	2025-04-18 09:56:18 +01:00
Nuno Cruces	68ef4593d6	Make libc easier to use.	2025-04-17 13:55:44 +01:00
Nuno Cruces	79bf171210	Fix #263 .	2025-04-16 16:39:36 +01:00
Nuno Cruces	ad16d329ea	Optimize `strlen` and `strchr` on ARM (#262 )	2025-04-15 00:44:31 +01:00
Nuno Cruces	9706fa9607	Benchmark more CPUs	2025-04-13 13:28:36 +01:00
Nuno Cruces	45494f5fb6	Redundant defers.	2025-04-09 10:21:54 +01:00
Nuno Cruces	1b0bf3495e	Fix flake.	2025-04-09 10:21:54 +01:00
Nuno Cruces	73ac7e06f6	Use SIMD libc.	2025-04-09 10:21:44 +01:00
Nuno Cruces	a3ce8f9de5	More.	2025-04-07 01:32:15 +01:00
Nuno Cruces	2043d5fca4	Benchmark.	2025-04-06 23:24:34 +01:00
Nuno Cruces	3bd11a0a86	More SIMD.	2025-04-05 11:16:47 +01:00
Nuno Cruces	39f3fa64eb	More SIMD.	2025-04-05 02:03:31 +01:00
Nuno Cruces	4c19387535	SIMD.	2025-04-04 17:47:20 +01:00
Nuno Cruces	e6c9f18934	Benchmark libc.	2025-04-04 10:56:12 +01:00
Nuno Cruces	970eb6a2f9	Fix.	2025-04-02 15:33:21 +01:00
Nuno Cruces	fac27b8bab	libc.	2025-04-02 11:55:20 +01:00
Nuno Cruces	9f626b2f52	Fix #255 .	2025-03-31 16:33:31 +01:00
Nuno Cruces	1f5d8bf7df	Avoid escaping times (#256 )	2025-03-31 13:02:41 +01:00
Nuno Cruces	41dc46af7e	Optimize errors a bit.	2025-03-28 17:01:04 +00:00
Nuno Cruces	e5c285b783	Discussion #250 .	2025-03-28 11:30:47 +00:00
Nuno Cruces	6290a14990	Fix interrupt race.	2025-03-26 19:02:14 +00:00
Nuno Cruces	948641194b	Rework context cancellation. (#251 )	2025-03-26 11:39:06 +00:00
Nuno Cruces	befed7cf23	binaryen-version_123.	2025-03-26 11:25:54 +00:00
Nuno Cruces	3547d9ffb0	Fix WAL flakiness on Windows (#254 )	2025-03-26 10:17:19 +00:00
Nuno Cruces	a67165eb09	Fix WAL flakiness on Windows (#253 )	2025-03-26 02:13:30 +00:00
Nuno Cruces	0ba393199a	Mitigate #252 .	2025-03-25 23:36:57 +00:00
Nuno Cruces	9e4258bc46	Better fix #249 .	2025-03-25 12:45:27 +00:00
Nuno Cruces	b645721d10	IP/CIDR functions. (#246 )	2025-03-24 22:38:22 +00:00
Nuno Cruces	6c296231a5	Fix #249 .	2025-03-24 19:59:19 +00:00
Nuno Cruces	c067e3630b	Improve SetInterrupt performance.	2025-03-24 10:41:50 +00:00
Nuno Cruces	35a2dbd847	Improve context cancellation performance. (#248 )	2025-03-21 11:06:29 +00:00
Nuno Cruces	b36f73c66d	Optimize.	2025-03-17 12:24:36 +00:00
Nuno Cruces	d36f19fd91	Docs.	2025-03-14 11:37:48 +00:00
Nuno Cruces	eba71b1f42	Go 1.24.1.	2025-03-14 00:54:12 +00:00
Nuno Cruces	d78239bfbf	More EINTR.	2025-03-14 00:07:09 +00:00
Nuno Cruces	49852732b2	Optimize.	2025-03-12 17:29:12 +00:00
Nuno Cruces	9b90d076cb	Update README.md	2025-03-12 12:01:13 +00:00
Nuno Cruces	15b94577b1	Tweak.	2025-03-11 20:15:53 +00:00
Nuno Cruces	25557244cc	Global ConfigLog.	2025-03-11 17:07:56 +00:00
Nuno Cruces	c2d3bf0cfc	Reduce flakyness.	2025-03-11 14:57:48 +00:00
Nuno Cruces	58a5682084	Handle EINTR.	2025-03-11 12:07:14 +00:00
Nuno Cruces	1ed954e96f	Fix #243 .	2025-03-10 14:54:34 +00:00
Nuno Cruces	9e7a0a875d	Improved arg reuse.	2025-03-10 12:01:15 +00:00
Nuno Cruces	26adda4529	Seq aggregate functions (#229 )	2025-03-08 14:07:43 +00:00
Nuno Cruces	2f6cd8de1d	Docs.	2025-03-07 11:47:02 +00:00
dependabot[bot]	e027e055ff	Bump golang.org/x/crypto from 0.35.0 to 0.36.0 (#239 ) Bumps [golang.org/x/crypto](https://github.com/golang/crypto) from 0.35.0 to 0.36.0. - [Commits](https://github.com/golang/crypto/compare/v0.35.0...v0.36.0) --- updated-dependencies: - dependency-name: golang.org/x/crypto dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2025-03-05 23:11:20 +00:00
dependabot[bot]	63fdc141e5	Bump golang.org/x/text from 0.22.0 to 0.23.0 (#240 ) Bumps [golang.org/x/text](https://github.com/golang/text) from 0.22.0 to 0.23.0. - [Release notes](https://github.com/golang/text/releases) - [Commits](https://github.com/golang/text/compare/v0.22.0...v0.23.0) --- updated-dependencies: - dependency-name: golang.org/x/text dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2025-03-05 22:57:38 +00:00
Nuno Cruces	0bbd145a49	Update modules.	2025-02-28 16:57:25 +00:00