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Nuno Cruces
2025-03-14 11:37:48 +00:00
parent eba71b1f42
commit d36f19fd91
2 changed files with 33 additions and 21 deletions
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28
ext/unicode/unicode.go
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@@ -5,18 +5,19 @@
// - 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];
// Like PostgreSQL, it also provides:
// - initcap(),
// - casefold(),
// - 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].
//
// It also provides (approximately) from PostgreSQL:
// - casefold(),
// - initcap(),
// - normalize(),
// - unaccent().
//
// Expect subtle differences (e.g.) in the handling of Turkish case folding.
//
// [ICU extension]: https://sqlite.org/src/dir/ext/icu
@@ -27,6 +28,7 @@ import (
"errors"
"regexp"
"strings"
"sync"
"unicode"
"unicode/utf8"
@@ -159,8 +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

26
ext/uuid/uuid.go
View File

@@ -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) {