diff options
Diffstat (limited to 'src/backend/executor/nodeHashjoin.c')
| -rw-r--r-- | src/backend/executor/nodeHashjoin.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/backend/executor/nodeHashjoin.c b/src/backend/executor/nodeHashjoin.c index 48cf30c21f4..d452d3865f5 100644 --- a/src/backend/executor/nodeHashjoin.c +++ b/src/backend/executor/nodeHashjoin.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/executor/nodeHashjoin.c,v 1.46 2002/12/30 15:21:20 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/executor/nodeHashjoin.c,v 1.47 2003/01/20 18:54:45 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -96,6 +96,15 @@ ExecHashJoin(HashJoinState *node) } /* + * If we're doing an IN join, we want to return at most one row per + * outer tuple; so we can stop scanning the inner scan if we matched on + * the previous try. + */ + if (node->js.jointype == JOIN_IN && + node->hj_MatchedOuter) + node->hj_NeedNewOuter = true; + + /* * Reset per-tuple memory context to free any expression evaluation * storage allocated in the previous tuple cycle. Note this can't * happen until we're done projecting out tuples from a join tuple. @@ -353,6 +362,7 @@ ExecInitHashJoin(HashJoin *node, EState *estate) switch (node->join.jointype) { case JOIN_INNER: + case JOIN_IN: break; case JOIN_LEFT: hjstate->hj_NullInnerTupleSlot = |