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Modify sequence state storage to eliminate dangling-pointer problem

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exemplified by bug #671.  Moving the storage to relcache turned out to
be a bad idea because relcache might decide to discard the info.  Instead,
open and close the relcache entry on each sequence operation, and use
a record of the current XID to discover whether we already hold
AccessShareLock on the sequence.
This commit is contained in:
Tom Lane
2002-05-22 21:40:55 +00:00
parent b8ffc99602
commit a2597ef179
5 changed files with 161 additions and 147 deletions
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5
src/include/commands/defrem.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: defrem.h,v 1.37 2002/05/17 18:32:52 petere Exp $
* $Id: defrem.h,v 1.38 2002/05/22 21:40:55 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -54,12 +54,13 @@ extern void DefineDomain(CreateDomainStmt *stmt);
extern void RemoveDomain(List *names, int behavior);
/* support routines in define.c */
/* support routines in commands/define.c */
extern void case_translate_language_name(const char *input, char *output);
extern char *defGetString(DefElem *def);
extern double defGetNumeric(DefElem *def);
extern int64 defGetInt64(DefElem *def);
extern List *defGetQualifiedName(DefElem *def);
extern TypeName *defGetTypeName(DefElem *def);
extern int defGetTypeLength(DefElem *def);