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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2010-07-12 17:01:06 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2010-07-12 17:01:06 +0000 |
| commit | 53e757689ce94520f1c53a89dbaa14ea57b09da7 (patch) | |
| tree | afa68ba05699223a719104b953bc20f37d4c33d1 /src/backend/executor/nodeSubqueryscan.c | |
| parent | 5a3489357fb61f1ea76412ada33549aca152ad55 (diff) | |
| download | postgresql-53e757689ce94520f1c53a89dbaa14ea57b09da7.tar.gz postgresql-53e757689ce94520f1c53a89dbaa14ea57b09da7.zip | |
Make NestLoop plan nodes pass outer-relation variables into their inner
relation using the general PARAM_EXEC executor parameter mechanism, rather
than the ad-hoc kluge of passing the outer tuple down through ExecReScan.
The previous method was hard to understand and could never be extended to
handle parameters coming from multiple join levels. This patch doesn't
change the set of possible plans nor have any significant performance effect,
but it's necessary infrastructure for future generalization of the concept
of an inner indexscan plan.
ExecReScan's second parameter is now unused, so it's removed.
Diffstat (limited to 'src/backend/executor/nodeSubqueryscan.c')
| -rw-r--r-- | src/backend/executor/nodeSubqueryscan.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/backend/executor/nodeSubqueryscan.c b/src/backend/executor/nodeSubqueryscan.c index dbd42d79720..9741a103b50 100644 --- a/src/backend/executor/nodeSubqueryscan.c +++ b/src/backend/executor/nodeSubqueryscan.c @@ -12,7 +12,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/executor/nodeSubqueryscan.c,v 1.45 2010/02/26 02:00:42 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/executor/nodeSubqueryscan.c,v 1.46 2010/07/12 17:01:05 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -22,7 +22,7 @@ * ExecSubqueryNext retrieve next tuple in sequential order. * ExecInitSubqueryScan creates and initializes a subqueryscan node. * ExecEndSubqueryScan releases any storage allocated. - * ExecSubqueryReScan rescans the relation + * ExecReScanSubqueryScan rescans the relation * */ #include "postgres.h" @@ -187,13 +187,13 @@ ExecEndSubqueryScan(SubqueryScanState *node) } /* ---------------------------------------------------------------- - * ExecSubqueryReScan + * ExecReScanSubqueryScan * * Rescans the relation. * ---------------------------------------------------------------- */ void -ExecSubqueryReScan(SubqueryScanState *node, ExprContext *exprCtxt) +ExecReScanSubqueryScan(SubqueryScanState *node) { ExecScanReScan(&node->ss); @@ -210,5 +210,5 @@ ExecSubqueryReScan(SubqueryScanState *node, ExprContext *exprCtxt) * first ExecProcNode. */ if (node->subplan->chgParam == NULL) - ExecReScan(node->subplan, NULL); + ExecReScan(node->subplan); } |