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Overview
| Comment: | Automatically cast BLOBs to strings prior to handing them over to functions like LIKE that want strings. Ticket #1605. (CVS 2928) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 730ddb0b74ed23c916dabd7ce893bd6b |
| User & Date: | drh 2006-01-12 19:42:41 |
Context
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2006-01-12
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| 20:28 | Performance boost in sqlite3VdbeRecordCompare. (CVS 2929) check-in: 14c42307 user: drh tags: trunk | |
| 19:42 | Automatically cast BLOBs to strings prior to handing them over to functions like LIKE that want strings. Ticket #1605. (CVS 2928) check-in: 730ddb0b user: drh tags: trunk | |
| 17:20 | Cache the encoding value inside VdbeExec. (CVS 2927) check-in: 6d2a816e user: drh tags: trunk | |
Changes
Changes to src/vdbemem.c.
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const void *sqlite3ValueText(sqlite3_value* pVal, u8 enc){
if( !pVal ) return 0;
assert( enc==SQLITE_UTF16LE || enc==SQLITE_UTF16BE || enc==SQLITE_UTF8);
if( pVal->flags&MEM_Null ){
return 0;
}
if( pVal->flags&MEM_Str ){
sqlite3VdbeChangeEncoding(pVal, enc);
}else if( !(pVal->flags&MEM_Blob) ){
sqlite3VdbeMemStringify(pVal, enc);
}
assert(pVal->enc==enc || sqlite3ThreadDataReadOnly()->mallocFailed);
return (const void *)(pVal->enc==enc ? (pVal->z) : 0);
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const void *sqlite3ValueText(sqlite3_value* pVal, u8 enc){
if( !pVal ) return 0;
assert( enc==SQLITE_UTF16LE || enc==SQLITE_UTF16BE || enc==SQLITE_UTF8);
if( pVal->flags&MEM_Null ){
return 0;
}
assert( (MEM_Blob>>3) == MEM_Str );
pVal->flags |= (pVal->flags & MEM_Blob)>>3;
if( pVal->flags&MEM_Str ){
sqlite3VdbeChangeEncoding(pVal, enc);
}else if( !(pVal->flags&MEM_Blob) ){
sqlite3VdbeMemStringify(pVal, enc);
}
assert(pVal->enc==enc || sqlite3ThreadDataReadOnly()->mallocFailed);
return (const void *)(pVal->enc==enc ? (pVal->z) : 0);
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Changes to test/enc3.test.
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# #*********************************************************************** # This file implements regression tests for SQLite library. # # The focus of this file is testing of the proper handling of conversions # to the native text representation. # # $Id: enc3.test,v 1.4 2004/11/14 21:56:31 drh Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl ifcapable {utf16} { do_test enc3-1.1 { execsql { ................................................................................ } } {abcdef {}} do_test enc3-1.5 { execsql { SELECT quote(x) || ' ' || quote(y) FROM t1 } } {{X'616263646566' NULL}} } finish_test |
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# #*********************************************************************** # This file implements regression tests for SQLite library. # # The focus of this file is testing of the proper handling of conversions # to the native text representation. # # $Id: enc3.test,v 1.5 2006/01/12 19:42:41 drh Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl ifcapable {utf16} { do_test enc3-1.1 { execsql { ................................................................................ } } {abcdef {}} do_test enc3-1.5 { execsql { SELECT quote(x) || ' ' || quote(y) FROM t1 } } {{X'616263646566' NULL}} } ifcapable {bloblit && utf16} { do_test enc3-2.1 { execsql { PRAGMA encoding } } {UTF-16le} do_test enc3-2.2 { execsql { CREATE TABLE t2(a); INSERT INTO t2 VALUES(x'61006200630064006500'); SELECT CAST(a AS text) FROM t2 WHERE a LIKE 'abc%'; } } {abcde} } finish_test |