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Overview
Comment:Do not use transitive WHERE-clause constraints on LEFT JOINs. Fix for ticket [c620261b5b5dc].
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Timelines: family | ancestors | descendants | both | trunk
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SHA1: 9aac4e588cbce55c1098321bcd042d5b04036893
User & Date: drh 2013-10-28 20:15:56
Context
2013-10-28
20:38
Add regression tests for ticket [c620261b5b5]. check-in: 05a35b09 user: drh tags: trunk
20:15
Do not use transitive WHERE-clause constraints on LEFT JOINs. Fix for ticket [c620261b5b5dc]. check-in: 9aac4e58 user: drh tags: trunk
19:59
More wheretrace debugging support: Show a listing of all WHERE clause terms (on wheretrace bit 0x100) and include important flags such as TERM_VIRTUAL, WO_EQUIV, and EP_FromJoin. check-in: 92ccd705 user: drh tags: trunk
Changes
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Changes to src/where.c.

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  int k = pScan->k;    /* Where to start scanning */

  while( pScan->iEquiv<=pScan->nEquiv ){
    iCur = pScan->aEquiv[pScan->iEquiv-2];
    iColumn = pScan->aEquiv[pScan->iEquiv-1];
    while( (pWC = pScan->pWC)!=0 ){
      for(pTerm=pWC->a+k; k<pWC->nTerm; k++, pTerm++){

        if( pTerm->leftCursor==iCur && pTerm->u.leftColumn==iColumn ){


          if( (pTerm->eOperator & WO_EQUIV)!=0
           && pScan->nEquiv<ArraySize(pScan->aEquiv)
          ){
            int j;
            pX = sqlite3ExprSkipCollate(pTerm->pExpr->pRight);
            assert( pX->op==TK_COLUMN );
            for(j=0; j<pScan->nEquiv; j+=2){







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  int k = pScan->k;    /* Where to start scanning */

  while( pScan->iEquiv<=pScan->nEquiv ){
    iCur = pScan->aEquiv[pScan->iEquiv-2];
    iColumn = pScan->aEquiv[pScan->iEquiv-1];
    while( (pWC = pScan->pWC)!=0 ){
      for(pTerm=pWC->a+k; k<pWC->nTerm; k++, pTerm++){
        if( pTerm->leftCursor==iCur
         && pTerm->u.leftColumn==iColumn
         && (pScan->iEquiv<=2 || !ExprHasProperty(pTerm->pExpr, EP_FromJoin))
        ){
          if( (pTerm->eOperator & WO_EQUIV)!=0
           && pScan->nEquiv<ArraySize(pScan->aEquiv)
          ){
            int j;
            pX = sqlite3ExprSkipCollate(pTerm->pExpr->pRight);
            assert( pX->op==TK_COLUMN );
            for(j=0; j<pScan->nEquiv; j+=2){