diff options
Diffstat (limited to 'src/backend/executor/nodeSubqueryscan.c')
| -rw-r--r-- | src/backend/executor/nodeSubqueryscan.c | 83 |
1 files changed, 35 insertions, 48 deletions
diff --git a/src/backend/executor/nodeSubqueryscan.c b/src/backend/executor/nodeSubqueryscan.c index 9b8711c9914..54dec2d1eec 100644 --- a/src/backend/executor/nodeSubqueryscan.c +++ b/src/backend/executor/nodeSubqueryscan.c @@ -12,7 +12,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/executor/nodeSubqueryscan.c,v 1.5 2001/03/22 03:59:29 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/executor/nodeSubqueryscan.c,v 1.6 2001/03/22 06:16:13 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -55,9 +55,8 @@ SubqueryNext(SubqueryScan *node) ScanDirection direction; TupleTableSlot *slot; - /* ---------------- - * get information from the estate and scan state - * ---------------- + /* + * get information from the estate and scan state */ estate = node->scan.plan.state; subquerystate = (SubqueryScanState *) node->scan.scanstate; @@ -85,9 +84,8 @@ SubqueryNext(SubqueryScan *node) return (slot); } - /* ---------------- - * get the next tuple from the sub-query - * ---------------- + /* + * get the next tuple from the sub-query */ subquerystate->sss_SubEState->es_direction = direction; @@ -111,9 +109,9 @@ SubqueryNext(SubqueryScan *node) TupleTableSlot * ExecSubqueryScan(SubqueryScan *node) { - /* ---------------- - * use SubqueryNext as access method - * ---------------- + + /* + * use SubqueryNext as access method */ return ExecScan(&node->scan, (ExecScanAccessMtd) SubqueryNext); } @@ -129,46 +127,41 @@ ExecInitSubqueryScan(SubqueryScan *node, EState *estate, Plan *parent) RangeTblEntry *rte; EState *sp_estate; - /* ---------------- - * SubqueryScan should not have any "normal" children. - * ---------------- + /* + * SubqueryScan should not have any "normal" children. */ Assert(outerPlan((Plan *) node) == NULL); Assert(innerPlan((Plan *) node) == NULL); - /* ---------------- - * assign the node's execution state - * ---------------- + /* + * assign the node's execution state */ node->scan.plan.state = estate; - /* ---------------- - * create new SubqueryScanState for node - * ---------------- + /* + * create new SubqueryScanState for node */ subquerystate = makeNode(SubqueryScanState); node->scan.scanstate = (CommonScanState *) subquerystate; - /* ---------------- - * Miscellaneous initialization + /* + * Miscellaneous initialization * - * + create expression context for node - * ---------------- + * create expression context for node */ ExecAssignExprContext(estate, &subquerystate->csstate.cstate); #define SUBQUERYSCAN_NSLOTS 2 - /* ---------------- - * tuple table initialization - * ---------------- + + /* + * tuple table initialization */ ExecInitResultTupleSlot(estate, &subquerystate->csstate.cstate); - /* ---------------- - * initialize subquery + /* + * initialize subquery * - * This should agree with ExecInitSubPlan - * ---------------- + * This should agree with ExecInitSubPlan */ rte = rt_fetch(node->scan.scanrelid, estate->es_range_table); Assert(rte->subquery != NULL); @@ -189,9 +182,8 @@ ExecInitSubqueryScan(SubqueryScan *node, EState *estate, Plan *parent) subquerystate->csstate.css_ScanTupleSlot = NULL; subquerystate->csstate.cstate.cs_TupFromTlist = false; - /* ---------------- - * initialize tuple type - * ---------------- + /* + * initialize tuple type */ ExecAssignResultTypeFromTL((Plan *) node, &subquerystate->csstate.cstate); ExecAssignProjectionInfo((Plan *) node, &subquerystate->csstate.cstate); @@ -222,27 +214,23 @@ ExecEndSubqueryScan(SubqueryScan *node) { SubqueryScanState *subquerystate; - /* ---------------- - * get information from node - * ---------------- + /* + * get information from node */ subquerystate = (SubqueryScanState *) node->scan.scanstate; - /* ---------------- - * Free the projection info and the scan attribute info + /* + * Free the projection info and the scan attribute info * - * Note: we don't ExecFreeResultType(subquerystate) - * because the rule manager depends on the tupType - * returned by ExecMain(). So for now, this - * is freed at end-transaction time. -cim 6/2/91 - * ---------------- + * Note: we don't ExecFreeResultType(subquerystate) because the rule + * manager depends on the tupType returned by ExecMain(). So for now, + * this is freed at end-transaction time. -cim 6/2/91 */ ExecFreeProjectionInfo(&subquerystate->csstate.cstate); ExecFreeExprContext(&subquerystate->csstate.cstate); - /* ---------------- + /* * close down subquery - * ---------------- */ ExecEndNode(node->subplan, node->subplan); @@ -250,9 +238,8 @@ ExecEndSubqueryScan(SubqueryScan *node) subquerystate->csstate.css_ScanTupleSlot = NULL; - /* ---------------- - * clean out the tuple table - * ---------------- + /* + * clean out the tuple table */ ExecClearTuple(subquerystate->csstate.cstate.cs_ResultTupleSlot); } |