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The OP_SeekScan opcode works, but using it requires disabling the

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IN-earlyout optimization because the OP_IfNoHope opcode might move the
cursor.

FossilOrigin-Name: f3c36b840c9a29c0add28039db216f4207a308e5057fc76e3f0004024a8267ac
This commit is contained in:
drh
2020-09-29 01:48:46 +00:00
parent 68cf0ace3d
commit f761d937c2
5 changed files with 76 additions and 20 deletions
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10
src/where.c
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@@ -5360,7 +5360,9 @@ void sqlite3WhereEnd(WhereInfo *pWInfo){
sqlite3VdbeJumpHere(v, pIn->addrInTop+1);
if( pIn->eEndLoopOp!=OP_Noop ){
if( pIn->nPrefix ){
assert( pLoop->wsFlags & WHERE_IN_EARLYOUT );
int bEarlyOut =
(pLoop->wsFlags & WHERE_VIRTUALTABLE)==0
&& (pLoop->wsFlags & WHERE_IN_EARLYOUT)!=0;
if( pLevel->iLeftJoin ){
/* For LEFT JOIN queries, cursor pIn->iCur may not have been
** opened yet. This occurs for WHERE clauses such as
@@ -5371,12 +5373,10 @@ void sqlite3WhereEnd(WhereInfo *pWInfo){
** jump over the OP_Next or OP_Prev instruction about to
** be coded. */
sqlite3VdbeAddOp2(v, OP_IfNotOpen, pIn->iCur,
sqlite3VdbeCurrentAddr(v) + 2 +
((pLoop->wsFlags & WHERE_VIRTUALTABLE)==0)
);
sqlite3VdbeCurrentAddr(v) + 2 + bEarlyOut);
VdbeCoverage(v);
}
if( (pLoop->wsFlags & WHERE_VIRTUALTABLE)==0 ){
if( bEarlyOut ){
sqlite3VdbeAddOp4Int(v, OP_IfNoHope, pLevel->iIdxCur,
sqlite3VdbeCurrentAddr(v)+2,
pIn->iBase, pIn->nPrefix);