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Solve the problem of OID collisions by probing for duplicate OIDs

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whenever we generate a new OID.  This prevents occasional duplicate-OID
errors that can otherwise occur once the OID counter has wrapped around.
Duplicate relfilenode values are also checked for when creating new
physical files.  Per my recent proposal.
This commit is contained in:
Tom Lane
2005-08-12 01:36:05 +00:00
parent 9e4a2de844
commit 721e53785d
20 changed files with 416 additions and 268 deletions
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7
src/include/utils/rel.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/rel.h,v 1.84 2005/05/27 23:31:21 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/rel.h,v 1.85 2005/08/12 01:36:05 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -136,8 +136,8 @@ typedef struct RelationData
bool rd_istemp; /* rel uses the local buffer mgr */
bool rd_isnailed; /* rel is nailed in cache */
bool rd_isvalid; /* relcache entry is valid */
char rd_indexvalid; /* state of rd_indexlist: 0 = not valid, 1
* = valid, 2 = temporarily forced */
char rd_indexvalid; /* state of rd_indexlist: 0 = not valid,
* 1 = valid, 2 = temporarily forced */
SubTransactionId rd_createSubid; /* rel was created in current xact */
/*
@@ -151,6 +151,7 @@ typedef struct RelationData
TupleDesc rd_att; /* tuple descriptor */
Oid rd_id; /* relation's object id */
List *rd_indexlist; /* list of OIDs of indexes on relation */
Oid rd_oidindex; /* OID of unique index on OID, if any */
LockInfoData rd_lockInfo; /* lock mgr's info for locking relation */
RuleLock *rd_rules; /* rewrite rules */
MemoryContext rd_rulescxt; /* private memory cxt for rd_rules, if any */