From c098d918e1e19088be9659c409f1a6fa32b0efe6 Mon Sep 17 00:00:00 2001

From: "D. Richard Hipp" <drh@hwaci.com>

Date: Mon, 28 Oct 2013 20:15:56 +0000

Subject: [PATCH] Do not use transitive WHERE-clause constraints on LEFT JOINs.

 Fix for ticket [c620261b5b5dc].

---

 src/where.c | 5 ++++-

 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/where.c b/src/where.c

index 266dc92..4868a7a 100644

--- a/src/where.c

+++ b/src/where.c

@@ -878,7 +878,10 @@ static WhereTerm *whereScanNext(WhereScan *pScan){

     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->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)

           ){

-- 

1.8.4.2