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Changes In Branch uuid-funcs Excluding Merge-Ins
This is equivalent to a diff from 5c118617cf to 97ba442b8d
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2019-10-23
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| 18:14 | Add uuid_string and uuid_blob functions (Leaf check-in: 97ba442b8d user: numist tags: uuid-funcs) | |
| 18:09 | When a vector comparison appears in the WHERE clause and the constraint side has a COLLATE clause on the first term of the vector, be sure to honor that COLLATE clause. Ticket [135c9da7513e5a97]. (check-in: 978b2d20cf user: drh tags: trunk) | |
| 18:01 | Create new branch named "uuid-funcs" (check-in: 815dc0437c user: numist tags: uuid-funcs) | |
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2019-10-22
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| 20:16 | Merge the row-value fix from trunk. (check-in: 1fbd743861 user: drh tags: generated-columns) | |
| 19:51 | Disqualify row-value comparisons for use by an index if the right-hand side has an affinity that does not match the index. Fix for ticket [6ef984af8972c2eb] (check-in: 5c118617cf user: drh tags: trunk) | |
| 11:29 | Previous check-in to fix [b47e3627ecaadbde] was incomplete. This check-in completes the fix and adds a test cases. (check-in: c7da1c01f1 user: drh tags: trunk) | |
Changes to src/func.c.
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sqlite3_result_text(context, zText, -1, SQLITE_TRANSIENT);
}
}
}
#else
# define groupConcatValue 0
#endif /* SQLITE_OMIT_WINDOWFUNC */
/*
** The uuid_blob() function. Interpret the argument as a RFC 4122 UUID string.
** Return a blob representing the parsed UUID.
*/
static void uuidBlob(
sqlite3_context *context,
int argc,
sqlite3_value **argv
){
int h, i, j = 0, rc = SQLITE_ERROR;
unsigned char parsed[16];
const char *zHex;
assert( argc==1 );
UNUSED_PARAMETER(argc);
zHex = sqlite3_value_text(argv[0]);
if( sqlite3_value_bytes(argv[0])==36 ){
for (i=0, h = zHex[i]; i <= 36; i++, h=zHex[i]) {
if ((i == 8) || (i == 13) || (i == 18) || (i == 23)) {
if( h !='-' ){
break;
}
}else if (i==36 && h==0 ){
rc = SQLITE_OK;
}else{
if( (h<'0' || h>'9')&&(h<'a'||h>'f')&&(h<'A'||h>'F') ){
break;
}
if( j%2 ){
parsed[j++ / 2] |= sqlite3HexToInt(h);
}else{
parsed[j++ / 2] = sqlite3HexToInt(h) << 4;
}
}
}
}
if( rc ){
sqlite3_result_error(context, "parameter is not a valid UUID", -1);
return;
}else{
sqlite3_result_blob(context, parsed, sizeof(parsed), SQLITE_TRANSIENT);
}
}
/*
** The uuid_string() function. Argument must be a 128-bit blob. Return a
** RFC 4122 string representation of the blob.
*/
static void uuidString(
sqlite3_context *context,
int argc,
sqlite3_value **argv
){
int i, n;
const unsigned char *pBlob;
char *zHex, *z;
assert( argc==1 );
UNUSED_PARAMETER(argc);
pBlob = sqlite3_value_blob(argv[0]);
n = sqlite3_value_bytes(argv[0]);
if( n>16 ){
sqlite3_result_error_toobig(context);
return;
}
if( n<16 ){
sqlite3_result_error(context, "parameter too small to print as UUID", -1);
return;
}
z = zHex = contextMalloc(context, 36);
if( zHex ){
for(i=0; i<16; i++, pBlob++){
unsigned char c = *pBlob;
*(z++) = hexdigits[(c>>4)&0xf];
*(z++) = hexdigits[c&0xf];
if( i==3||i==5||i==7||i==9 ){
*(z++) = '-';
}
}
sqlite3_result_text(context, zHex, 36, sqlite3_free);
}
}
/*
** This routine does per-connection function registration. Most
** of the built-in functions above are part of the global function set.
** This routine only deals with those that are not global.
*/
void sqlite3RegisterPerConnectionBuiltinFunctions(sqlite3 *db){
|
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** The array cannot be constant since changes are made to the
** FuncDef.pHash elements at start-time. The elements of this array
** are read-only after initialization is complete.
**
** For peak efficiency, put the most frequently used function last.
*/
static FuncDef aBuiltinFunc[] = {
FUNCTION(uuid_str, 1, 0, 0, uuidString),
FUNCTION(uuid_blob, 1, 0, 0, uuidBlob),
#ifdef SQLITE_SOUNDEX
FUNCTION(soundex, 1, 0, 0, soundexFunc ),
#endif
#ifndef SQLITE_OMIT_LOAD_EXTENSION
VFUNCTION(load_extension, 1, 0, 0, loadExt ),
VFUNCTION(load_extension, 2, 0, 0, loadExt ),
#endif
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