database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-08 03:22:21 +03:00
Code Activity

The LIKE optimization does the right thing when collating sequences are

Browse Source 
present.  LIKE expressions where the left-hand side has COLLATE NOCASE
are optimized in the default case. (CVS 2637)

FossilOrigin-Name: ef84ff795c85e9d28f1cac84ff42d8d4ef84cfc4
This commit is contained in:
drh
2005-08-28 17:00:23 +00:00
parent bfd6b03554
commit d64fe2f374
9 changed files with 126 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
src/sqliteInt.h
View File

@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.403 2005/08/19 00:14:42 drh Exp $
** @(#) $Id: sqliteInt.h,v 1.404 2005/08/28 17:00:23 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -511,7 +511,8 @@ struct FuncDef {
/*
** Possible values for FuncDef.flags
*/
#define SQLITE_FUNC_LIKEOPT 0x01 /* Candidate for the LIKE optimization */
#define SQLITE_FUNC_LIKE 0x01 /* Candidate for the LIKE optimization */
#define SQLITE_FUNC_CASE 0x02 /* Case-sensitive LIKE-type function */
/*
** information about each column of an SQL table is held in an instance
@@ -551,10 +552,19 @@ struct Column {
struct CollSeq {
char *zName; /* Name of the collating sequence, UTF-8 encoded */
u8 enc; /* Text encoding handled by xCmp() */
u8 type; /* One of the SQLITE_COLL_... values below */
void *pUser; /* First argument to xCmp() */
int (*xCmp)(void*,int, const void*, int, const void*);
};
/*
** Allowed values of CollSeq flags:
*/
#define SQLITE_COLL_BINARY 1 /* The default memcmp() collating sequence */
#define SQLITE_COLL_NOCASE 2 /* The built-in NOCASE collating sequence */
#define SQLITE_COLL_REVERSE 3 /* The built-in REVERSE collating sequence */
#define SQLITE_COLL_USER 0 /* Any other user-defined collating sequence */
/*
** A sort order can be either ASC or DESC.
*/
@@ -1583,7 +1593,7 @@ int sqlite3FindDb(sqlite3*, Token*);
void sqlite3AnalysisLoad(sqlite3*,int iDB);
void sqlite3DefaultRowEst(Index*);
void sqlite3RegisterLikeFunctions(sqlite3*, int);
int sqlite3IsLikeFunction(sqlite3*,Expr*,char*);
int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*);
#ifdef SQLITE_SSE
#include "sseInt.h"