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Phase 1 of read-only-plans project: cause executor state nodes to point

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to plan nodes, not vice-versa.  All executor state nodes now inherit from
struct PlanState.  Copying of plan trees has been simplified by not
storing a list of SubPlans in Plan nodes (eliminating duplicate links).
The executor still needs such a list, but it can build it during
ExecutorStart since it has to scan the plan tree anyway.
No initdb forced since no stored-on-disk structures changed, but you
will need a full recompile because of node-numbering changes.
This commit is contained in:
Tom Lane
2002-12-05 15:50:39 +00:00
parent 0f3b83edfa
commit 1fd0c59e25
71 changed files with 3032 additions and 3758 deletions
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14
src/backend/commands/portalcmds.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/portalcmds.c,v 1.4 2002/11/13 00:44:08 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/portalcmds.c,v 1.5 2002/12/05 15:50:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -23,6 +23,10 @@
/*
* PortalCleanup
*
* Clean up a portal when it's dropped. Since this mainly exists to run
* ExecutorEnd(), it should not be set as the cleanup hook until we have
* called ExecutorStart() on the portal's query.
*/
void
PortalCleanup(Portal portal)
@ -43,7 +47,7 @@ PortalCleanup(Portal portal)
/*
* tell the executor to shutdown the query
*/
ExecutorEnd(PortalGetQueryDesc(portal), PortalGetState(portal));
ExecutorEnd(PortalGetQueryDesc(portal));
/*
* switch back to previous context
@ -116,7 +120,7 @@ PerformPortalFetch(char *name,
oldcontext = MemoryContextSwitchTo(PortalGetHeapMemory(portal));
queryDesc = PortalGetQueryDesc(portal);
estate = PortalGetState(portal);
estate = queryDesc->estate;
/*
* If the requested destination is not the same as the query's
@ -158,7 +162,7 @@ PerformPortalFetch(char *name,
else
direction = ForwardScanDirection;
ExecutorRun(queryDesc, estate, direction, (long) count);
ExecutorRun(queryDesc, direction, (long) count);
if (estate->es_processed > 0)
portal->atStart = false; /* OK to back up now */
@ -172,7 +176,7 @@ PerformPortalFetch(char *name,
else
direction = BackwardScanDirection;
ExecutorRun(queryDesc, estate, direction, (long) count);
ExecutorRun(queryDesc, direction, (long) count);
if (estate->es_processed > 0)
portal->atEnd = false; /* OK to go forward now */