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 REGEXP operator is recognized. It tries to invoke a function named

Browse Source 
regexp() which does not exist in the native build.  But users who want to
can add an appropriate regexp() function using sqlite3_create_function(). (CVS 2478)

FossilOrigin-Name: 42a626ace126f730f33ecb6c41ac5679d6766a31
This commit is contained in:
drh
2005-05-23 17:26:51 +00:00
parent 15ccce1c0d
commit b71090fdfb
5 changed files with 39 additions and 87 deletions
Download Patch File Download Diff File Expand all files Collapse all files

63
src/expr.c
View File

@@ -12,7 +12,7 @@
** This file contains routines used for analyzing expressions and
** for generating VDBE code that evaluates expressions in SQLite.
**
** $Id: expr.c,v 1.199 2005/05/23 15:06:39 drh Exp $
** $Id: expr.c,v 1.200 2005/05/23 17:26:51 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
@@ -994,49 +994,6 @@ lookupname_end_2:
}
}
/*
** pExpr is a node that defines a function of some kind. It might
** be a syntactic function like "count(x)" or it might be a function
** that implements an operator, like "a LIKE b".
**
** This routine makes *pzName point to the name of the function and
** *pnName hold the number of characters in the function name.
*/
static void getFunctionName(Expr *pExpr, const char **pzName, int *pnName){
switch( pExpr->op ){
case TK_FUNCTION: {
*pzName = pExpr->token.z;
*pnName = pExpr->token.n;
break;
}
case TK_LIKE: {
*pzName = "like";
*pnName = 4;
break;
}
case TK_GLOB: {
*pzName = "glob";
*pnName = 4;
break;
}
case TK_CTIME: {
*pzName = "current_time";
*pnName = 12;
break;
}
case TK_CDATE: {
*pzName = "current_date";
*pnName = 12;
break;
}
case TK_CTIMESTAMP: {
*pzName = "current_timestamp";
*pnName = 17;
break;
}
}
}
/*
** This routine is designed as an xFunc for walkExprTree().
**
@@ -1111,11 +1068,7 @@ static int nameResolverStep(void *pArg, Expr *pExpr){
/* Resolve function names
*/
case TK_CTIME:
case TK_CTIMESTAMP:
case TK_CDATE:
case TK_GLOB:
case TK_LIKE:
case TK_CONST_FUNC:
case TK_FUNCTION: {
ExprList *pList = pExpr->pList; /* The argument list */
int n = pList ? pList->nExpr : 0; /* Number of arguments */
@@ -1128,7 +1081,8 @@ static int nameResolverStep(void *pArg, Expr *pExpr){
FuncDef *pDef; /* Information about the function */
int enc = pParse->db->enc; /* The database encoding */
getFunctionName(pExpr, &zId, &nId);
zId = pExpr->token.z;
nId = pExpr->token.n;
pDef = sqlite3FindFunction(pParse->db, zId, nId, n, enc, 0);
if( pDef==0 ){
pDef = sqlite3FindFunction(pParse->db, zId, nId, -1, enc, 0);
@@ -1544,11 +1498,7 @@ void sqlite3ExprCode(Parse *pParse, Expr *pExpr){
sqlite3VdbeAddOp(v, OP_AggGet, 0, pExpr->iAgg);
break;
}
case TK_CDATE:
case TK_CTIME:
case TK_CTIMESTAMP:
case TK_GLOB:
case TK_LIKE:
case TK_CONST_FUNC:
case TK_FUNCTION: {
ExprList *pList = pExpr->pList;
int nExpr = pList ? pList->nExpr : 0;
@@ -1559,7 +1509,8 @@ void sqlite3ExprCode(Parse *pParse, Expr *pExpr){
int i;
u8 enc = pParse->db->enc;
CollSeq *pColl = 0;
getFunctionName(pExpr, &zId, &nId);
zId = pExpr->token.z;
nId = pExpr->token.n;
pDef = sqlite3FindFunction(pParse->db, zId, nId, nExpr, enc, 0);
assert( pDef!=0 );
nExpr = sqlite3ExprCodeExprList(pParse, pList);