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Do not allow an empty table bypass to jump outside of a right-join body

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subroutine.

FossilOrigin-Name: 1549dcd2353903b70abadd428eeef971ab940df04fb05a6b83b04ee30932db6d
This commit is contained in:
drh
2022-04-18 10:26:50 +00:00
parent d973268ccf
commit d875c7eefe
4 changed files with 25 additions and 20 deletions
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5
src/wherecode.c
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@@ -1516,7 +1516,10 @@ Bitmask sqlite3WhereCodeOneLoopStart(
/* Compute a safe address to jump to if we discover that the table for
** this loop is empty and can never contribute content. */
for(j=iLevel; j>0 && pWInfo->a[j].iLeftJoin==0; j--){}
for(j=iLevel; j>0; j--){
if( pWInfo->a[j].iLeftJoin ) break;
if( pWInfo->a[j].pRJ ) break;
}
addrHalt = pWInfo->a[j].addrBrk;
/* Special case of a FROM clause subquery implemented as a co-routine */