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Make OIDs optional, per discussions in pghackers. WITH OIDS is still the

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default, but OIDS are removed from many system catalogs that don't need them.
Some interesting side effects: TOAST pointers are 20 bytes not 32 now;
pg_description has a three-column key instead of one.

Bugs fixed in passing: BINARY cursors work again; pg_class.relhaspkey
has some usefulness; pg_dump dumps comments on indexes, rules, and
triggers in a valid order.

initdb forced.
This commit is contained in:
Tom Lane
2001-08-10 18:57:42 +00:00
parent d062f0f4e9
commit bf56f0759b
83 changed files with 1962 additions and 1583 deletions
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30
src/backend/access/transam/varsup.c
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@@ -6,7 +6,7 @@
* Copyright (c) 2000, PostgreSQL Global Development Group
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/transam/varsup.c,v 1.42 2001/07/16 22:43:33 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/varsup.c,v 1.43 2001/08/10 18:57:33 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -105,11 +105,26 @@ ReadNewTransactionId(TransactionId *xid)
static Oid lastSeenOid = InvalidOid;
void
GetNewObjectId(Oid *oid_return)
Oid
GetNewObjectId(void)
{
Oid result;
SpinAcquire(OidGenLockId);
/*
* Check for wraparound of the OID counter. We *must* not return 0
* (InvalidOid); and as long as we have to check that, it seems a good
* idea to skip over everything below BootstrapObjectIdData too. (This
* basically just reduces the odds of OID collision right after a wrap
* occurs.) Note we are relying on unsigned comparison here.
*/
if (ShmemVariableCache->nextOid < ((Oid) BootstrapObjectIdData))
{
ShmemVariableCache->nextOid = BootstrapObjectIdData;
ShmemVariableCache->oidCount = 0;
}
/* If we run out of logged for use oids then we must log more */
if (ShmemVariableCache->oidCount == 0)
{
@@ -117,13 +132,16 @@ GetNewObjectId(Oid *oid_return)
ShmemVariableCache->oidCount = VAR_OID_PREFETCH;
}
if (PointerIsValid(oid_return))
lastSeenOid = (*oid_return) = ShmemVariableCache->nextOid;
result = ShmemVariableCache->nextOid;
(ShmemVariableCache->nextOid)++;
(ShmemVariableCache->oidCount)--;
SpinRelease(OidGenLockId);
lastSeenOid = result;
return result;
}
void
@@ -159,8 +177,8 @@ CheckMaxObjectId(Oid assigned_oid)
*/
XLogPutNextOid(assigned_oid + VAR_OID_PREFETCH);
ShmemVariableCache->oidCount = VAR_OID_PREFETCH - 1;
ShmemVariableCache->nextOid = assigned_oid + 1;
ShmemVariableCache->oidCount = VAR_OID_PREFETCH - 1;
SpinRelease(OidGenLockId);
}