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Optimize LIKE and GLOB operators in the WHERE clause. Code passes all

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regression tests but still needs additional tests. (CVS 2581)

FossilOrigin-Name: 3edbe8d6217fd1180883e6b9f1e5b9011a39f80d
This commit is contained in:
drh
2005-08-12 22:56:09 +00:00
parent 2db0bbc24b
commit d2687b7731
7 changed files with 146 additions and 47 deletions
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27
src/vdbeaux.c
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@@ -442,33 +442,6 @@ void sqlite3VdbeComment(Vdbe *p, const char *zFormat, ...){
}
#endif
/*
** If the P3 operand to the specified instruction appears
** to be a quoted string token, then this procedure removes
** the quotes.
**
** The quoting operator can be either a grave ascent (ASCII 0x27)
** or a double quote character (ASCII 0x22). Two quotes in a row
** resolve to be a single actual quote character within the string.
*/
void sqlite3VdbeDequoteP3(Vdbe *p, int addr){
Op *pOp;
assert( p->magic==VDBE_MAGIC_INIT );
if( p->aOp==0 ) return;
if( addr<0 || addr>=p->nOp ){
addr = p->nOp - 1;
if( addr<0 ) return;
}
pOp = &p->aOp[addr];
if( pOp->p3==0 || pOp->p3[0]==0 ) return;
if( pOp->p3type==P3_STATIC ){
pOp->p3 = sqliteStrDup(pOp->p3);
pOp->p3type = P3_DYNAMIC;
}
assert( pOp->p3type==P3_DYNAMIC );
sqlite3Dequote(pOp->p3);
}
/*
** Search the current program starting at instruction addr for the given
** opcode and P2 value. Return the address plus 1 if found and 0 if not