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Batch column scans. (#52)

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Nuno Cruces
2024-01-16 15:18:14 +00:00
committed by GitHub
parent 1b2c267b2b
commit c822fa95c7
10 changed files with 111 additions and 33 deletions
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51
sqlite3/column.c Normal file
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@@ -0,0 +1,51 @@
#include <stddef.h>
#include "sqlite3.h"
union sqlite3_data {
sqlite3_int64 i;
double d;
struct {
const void *ptr;
int len;
};
};
int sqlite3_columns_go(sqlite3_stmt *stmt, int nCol, char *aType,
union sqlite3_data *aData) {
if (nCol != sqlite3_column_count(stmt)) {
return SQLITE_MISUSE;
}
int rc = SQLITE_OK;
for (int i = 0; i < nCol; ++i) {
const void *ptr = NULL;
switch (aType[i] = sqlite3_column_type(stmt, i)) {
default: // SQLITE_NULL
aData[i] = (union sqlite3_data){};
case SQLITE_INTEGER:
aData[i].i = sqlite3_column_int64(stmt, i);
continue;
case SQLITE_FLOAT:
aData[i].d = sqlite3_column_double(stmt, i);
continue;
case SQLITE_TEXT:
ptr = sqlite3_column_text(stmt, i);
break;
case SQLITE_BLOB:
ptr = sqlite3_column_blob(stmt, i);
break;
}
if (ptr == NULL && rc == SQLITE_OK) {
rc = sqlite3_errcode(sqlite3_db_handle(stmt));
}
aData[i].ptr = ptr;
aData[i].len = sqlite3_column_bytes(stmt, i);
}
return rc;
}
static_assert(offsetof(union sqlite3_data, i) == 0, "Unexpected offset");
static_assert(offsetof(union sqlite3_data, d) == 0, "Unexpected offset");
static_assert(offsetof(union sqlite3_data, ptr) == 0, "Unexpected offset");
static_assert(offsetof(union sqlite3_data, len) == 4, "Unexpected offset");
static_assert(sizeof(union sqlite3_data) == 8, "Unexpected size");

1
sqlite3/main.c
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@@ -10,6 +10,7 @@
#include "ext/uint.c"
#include "ext/uuid.c"
// Bindings
#include "column.c"
#include "func.c"
#include "log.c"
#include "pointer.c"

2
sqlite3/vtab.c
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@@ -136,8 +136,6 @@ static int go_cur_close_wrapper(sqlite3_vtab_cursor *pCursor) {
static int go_vtab_find_function_wrapper(
sqlite3_vtab *pVTab, int nArg, const char *zName,
void (**pxFunc)(sqlite3_context *, int, sqlite3_value **), void **ppArg) {
struct go_vtab *vtab = container_of(pVTab, struct go_vtab, base);
go_handle handle;
int rc = go_vtab_find_function(pVTab, nArg, zName, &handle);
if (rc) {