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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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25
src/backend/commands/prepare.c
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@ -6,7 +6,7 @@
* Copyright (c) 2002, PostgreSQL Global Development Group
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/prepare.c,v 1.8 2002/11/15 00:47:22 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/prepare.c,v 1.9 2002/12/05 15:50:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -49,7 +49,7 @@ static void InitQueryHashTable(void);
static void StoreQuery(const char *stmt_name, List *query_list,
List *plan_list, List *argtype_list);
static QueryHashEntry *FetchQuery(const char *plan_name);
static void RunQuery(QueryDesc *qdesc, EState *state);
static void RunQuery(QueryDesc *qdesc);
/*
@ -151,15 +151,12 @@ ExecuteQuery(ExecuteStmt *stmt, CommandDest outputDest)
else
{
QueryDesc *qdesc;
EState *state;
if (log_executor_stats)
ResetUsage();
qdesc = CreateQueryDesc(query, plan, outputDest, NULL);
state = CreateExecutorState();
state->es_param_list_info = paramLI;
qdesc = CreateQueryDesc(query, plan, outputDest, NULL,
paramLI, false);
if (stmt->into)
{
@ -170,7 +167,7 @@ ExecuteQuery(ExecuteStmt *stmt, CommandDest outputDest)
qdesc->dest = None;
}
RunQuery(qdesc, state);
RunQuery(qdesc);
if (log_executor_stats)
ShowUsage("EXECUTOR STATISTICS");
@ -334,15 +331,11 @@ FetchQueryParams(const char *plan_name)
* Actually execute a prepared query.
*/
static void
RunQuery(QueryDesc *qdesc, EState *state)
RunQuery(QueryDesc *qdesc)
{
TupleDesc tupdesc;
tupdesc = ExecutorStart(qdesc, state);
ExecutorRun(qdesc, state, state->es_direction, 0L);
ExecutorEnd(qdesc, state);
ExecutorStart(qdesc);
ExecutorRun(qdesc, ForwardScanDirection, 0L);
ExecutorEnd(qdesc);
}
/*