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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2008-10-04 21:56:55 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2008-10-04 21:56:55 +0000 |
| commit | 44d5be0e5308e951c0c5dc522b4bcacf2bcbc476 (patch) | |
| tree | 516f1c70436225751f631e7e686f7ea61b3db9df /src/backend/executor/execAmi.c | |
| parent | 607b2be7bb230ea4c558cb3101794f94de35ab85 (diff) | |
| download | postgresql-44d5be0e5308e951c0c5dc522b4bcacf2bcbc476.tar.gz postgresql-44d5be0e5308e951c0c5dc522b4bcacf2bcbc476.zip | |
Implement SQL-standard WITH clauses, including WITH RECURSIVE.
There are some unimplemented aspects: recursive queries must use UNION ALL
(should allow UNION too), and we don't have SEARCH or CYCLE clauses.
These might or might not get done for 8.4, but even without them it's a
pretty useful feature.
There are also a couple of small loose ends and definitional quibbles,
which I'll send a memo about to pgsql-hackers shortly. But let's land
the patch now so we can get on with other development.
Yoshiyuki Asaba, with lots of help from Tatsuo Ishii and Tom Lane
Diffstat (limited to 'src/backend/executor/execAmi.c')
| -rw-r--r-- | src/backend/executor/execAmi.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/src/backend/executor/execAmi.c b/src/backend/executor/execAmi.c index afddf4d3920..1de3f5a778e 100644 --- a/src/backend/executor/execAmi.c +++ b/src/backend/executor/execAmi.c @@ -6,7 +6,7 @@ * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/backend/executor/execAmi.c,v 1.98 2008/10/01 19:51:49 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/executor/execAmi.c,v 1.99 2008/10/04 21:56:53 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -30,6 +30,7 @@ #include "executor/nodeMaterial.h" #include "executor/nodeMergejoin.h" #include "executor/nodeNestloop.h" +#include "executor/nodeRecursiveunion.h" #include "executor/nodeResult.h" #include "executor/nodeSeqscan.h" #include "executor/nodeSetOp.h" @@ -39,6 +40,8 @@ #include "executor/nodeTidscan.h" #include "executor/nodeUnique.h" #include "executor/nodeValuesscan.h" +#include "executor/nodeCtescan.h" +#include "executor/nodeWorktablescan.h" /* @@ -121,6 +124,10 @@ ExecReScan(PlanState *node, ExprContext *exprCtxt) ExecReScanAppend((AppendState *) node, exprCtxt); break; + case T_RecursiveUnionState: + ExecRecursiveUnionReScan((RecursiveUnionState *) node, exprCtxt); + break; + case T_BitmapAndState: ExecReScanBitmapAnd((BitmapAndState *) node, exprCtxt); break; @@ -161,6 +168,14 @@ ExecReScan(PlanState *node, ExprContext *exprCtxt) ExecValuesReScan((ValuesScanState *) node, exprCtxt); break; + case T_CteScanState: + ExecCteScanReScan((CteScanState *) node, exprCtxt); + break; + + case T_WorkTableScanState: + ExecWorkTableScanReScan((WorkTableScanState *) node, exprCtxt); + break; + case T_NestLoopState: ExecReScanNestLoop((NestLoopState *) node, exprCtxt); break; @@ -396,6 +411,8 @@ ExecSupportsBackwardScan(Plan *node) case T_TidScan: case T_FunctionScan: case T_ValuesScan: + case T_CteScan: + case T_WorkTableScan: return true; case T_SubqueryScan: |