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Explicit collations always override implicit collations. This is

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backwards compatible since SQLite has not previously supported
explicit collations. Need to add tests of this new behavior. (CVS 3633)

FossilOrigin-Name: 3638823a629164e4158f76d03ff2cea1eab34e9d
This commit is contained in:
drh
2007-02-07 13:09:45 +00:00
parent 53a677749f
commit ec41ddac37
3 changed files with 22 additions and 11 deletions
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19
src/expr.c
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@@ -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 1.274 2007/02/02 12:44:37 drh Exp $
** $Id: expr.c,v 1.275 2007/02/07 13:09:46 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
@@ -176,9 +176,20 @@ static int binaryCompareP1(Expr *pExpr1, Expr *pExpr2, int jumpIfNull){
** type.
*/
static CollSeq* binaryCompareCollSeq(Parse *pParse, Expr *pLeft, Expr *pRight){
CollSeq *pColl = sqlite3ExprCollSeq(pParse, pLeft);
if( !pColl ){
pColl = sqlite3ExprCollSeq(pParse, pRight);
CollSeq *pColl;
assert( pLeft );
assert( pRight );
if( pLeft->flags & EP_ExpCollate ){
assert( pLeft->pColl );
pColl = pLeft->pColl;
}else if( pRight->flags & EP_ExpCollate ){
assert( pRight->pColl );
pColl = pRight->pColl;
}else{
pColl = sqlite3ExprCollSeq(pParse, pLeft);
if( !pColl ){
pColl = sqlite3ExprCollSeq(pParse, pRight);
}
}
return pColl;
}