From 2c0ef9777cce8f97dd01073d962e6aa31722b5ad Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Tue, 28 Feb 2006 04:10:28 +0000 Subject: Extend the ExecInitNode API so that plan nodes receive a set of flag bits indicating which optional capabilities can actually be exercised at runtime. This will allow Sort and Material nodes, and perhaps later other nodes, to avoid unnecessary overhead in common cases. This commit just adds the infrastructure and arranges to pass the correct flag values down to plan nodes; none of the actual optimizations are here yet. I'm committing this separately in case anyone wants to measure the added overhead. (It should be negligible.) Simon Riggs and Tom Lane --- src/backend/commands/explain.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) (limited to 'src/backend/commands/explain.c') diff --git a/src/backend/commands/explain.c b/src/backend/commands/explain.c index 5cfc15c3391..755a64a9446 100644 --- a/src/backend/commands/explain.c +++ b/src/backend/commands/explain.c @@ -7,7 +7,7 @@ * Portions Copyright (c) 1994-5, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/commands/explain.c,v 1.143 2006/02/05 02:59:16 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/commands/explain.c,v 1.144 2006/02/28 04:10:27 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -233,6 +233,7 @@ ExplainOnePlan(QueryDesc *queryDesc, ExplainStmt *stmt, double totaltime = 0; ExplainState *es; StringInfo str; + int eflags; INSTR_TIME_SET_CURRENT(starttime); @@ -240,8 +241,14 @@ ExplainOnePlan(QueryDesc *queryDesc, ExplainStmt *stmt, if (stmt->analyze) AfterTriggerBeginQuery(); + /* Select execution options */ + if (stmt->analyze) + eflags = 0; /* default run-to-completion flags */ + else + eflags = EXEC_FLAG_EXPLAIN_ONLY; + /* call ExecutorStart to prepare the plan for execution */ - ExecutorStart(queryDesc, !stmt->analyze); + ExecutorStart(queryDesc, eflags); /* Execute the plan for statistics if asked for */ if (stmt->analyze) -- cgit v1.2.3