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First phase of plan-invalidation project: create a plan cache management

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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.
This commit is contained in:
Tom Lane
2007-03-13 00:33:44 +00:00
parent f84308f195
commit b9527e9840
61 changed files with 2478 additions and 1354 deletions
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4
src/include/commands/view.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/commands/view.h,v 1.24 2007/01/05 22:19:54 momjian Exp $
* $PostgreSQL: pgsql/src/include/commands/view.h,v 1.25 2007/03/13 00:33:43 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -16,7 +16,7 @@
#include "nodes/parsenodes.h"
extern void DefineView(RangeVar *view, Query *view_parse, bool replace);
extern void DefineView(ViewStmt *stmt, const char *queryString);
extern void RemoveView(const RangeVar *view, DropBehavior behavior);
#endif /* VIEW_H */