From b9527e984092e838790b543b014c0c2720ea4f11 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Tue, 13 Mar 2007 00:33:44 +0000 Subject: First phase of plan-invalidation project: create a plan cache management module and teach PREPARE and protocol-level prepared statements to use it. In service of this, rearrange utility-statement processing so that parse analysis does not assume table schemas can't change before execution for utility statements (necessary because we don't attempt to re-acquire locks for utility statements when reusing a stored plan). This requires some refactoring of the ProcessUtility API, but it ends up cleaner anyway, for instance we can get rid of the QueryContext global. Still to do: fix up SPI and related code to use the plan cache; I'm tempted to try to make SQL functions use it too. Also, there are at least some aspects of system state that we want to ensure remain the same during a replan as in the original processing; search_path certainly ought to behave that way for instance, and perhaps there are others. --- src/include/commands/explain.h | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) (limited to 'src/include/commands/explain.h') diff --git a/src/include/commands/explain.h b/src/include/commands/explain.h index 981064297f9..42879ce5a40 100644 --- a/src/include/commands/explain.h +++ b/src/include/commands/explain.h @@ -6,7 +6,7 @@ * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group * Portions Copyright (c) 1994-5, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/commands/explain.h,v 1.29 2007/01/05 22:19:53 momjian Exp $ + * $PostgreSQL: pgsql/src/include/commands/explain.h,v 1.30 2007/03/13 00:33:43 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -16,11 +16,16 @@ #include "executor/executor.h" -extern void ExplainQuery(ExplainStmt *stmt, ParamListInfo params, - DestReceiver *dest); +extern void ExplainQuery(ExplainStmt *stmt, const char *queryString, + ParamListInfo params, DestReceiver *dest); extern TupleDesc ExplainResultDesc(ExplainStmt *stmt); +extern void ExplainOneUtility(Node *utilityStmt, ExplainStmt *stmt, + const char *queryString, + ParamListInfo params, + TupOutputState *tstate); + extern void ExplainOnePlan(QueryDesc *queryDesc, ExplainStmt *stmt, TupOutputState *tstate); -- cgit v1.2.3