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Create a new HeapTupleSatisfiesVacuum() routine in tqual.c that embodies the

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validity checking rules for VACUUM.  Make some other rearrangements of the
VACUUM code to allow more code to be shared between full and lazy VACUUM.
Minor code cleanups and added comments for TransactionId manipulations.
This commit is contained in:
Tom Lane
2001-07-12 04:11:13 +00:00
parent eaafc9d66c
commit b9f3a929ee
14 changed files with 643 additions and 567 deletions
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40
src/backend/access/transam/transam.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/transam/transam.c,v 1.44 2001/05/14 20:30:19 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/transam.c,v 1.45 2001/07/12 04:11:13 tgl Exp $
*
* NOTES
* This file contains the high level access-method interface to the
@ -24,6 +24,7 @@
#include "catalog/catname.h"
#include "miscadmin.h"
static int RecoveryCheckingEnabled(void);
static void TransRecover(Relation logRelation);
static bool TransactionLogTest(TransactionId transactionId, XidStatus status);
@ -40,29 +41,11 @@ static void TransactionLogUpdate(TransactionId transactionId,
Relation LogRelation = (Relation) NULL;
/* ----------------
* global variables holding cached transaction id's and statuses.
* Single-item cache for results of TransactionLogTest.
* ----------------
*/
TransactionId cachedTestXid;
XidStatus cachedTestXidStatus;
/* ----------------
* transaction system constants
* ----------------
*/
/* ----------------------------------------------------------------
* transaction system constants
*
* read the comments for GetNewTransactionId in order to
* understand the initial values for AmiTransactionId and
* FirstTransactionId. -cim 3/23/90
* ----------------------------------------------------------------
*/
TransactionId NullTransactionId = (TransactionId) 0;
TransactionId AmiTransactionId = (TransactionId) 512;
TransactionId FirstTransactionId = (TransactionId) 514;
static TransactionId cachedTestXid = NullTransactionId;
static XidStatus cachedTestXidStatus;
/* ----------------
* transaction recovery state variables
@ -76,7 +59,7 @@ TransactionId FirstTransactionId = (TransactionId) 514;
* goes from zero to one. -cim 3/21/90
* ----------------
*/
int RecoveryCheckingEnableState = 0;
static int RecoveryCheckingEnableState = 0;
/* ----------------
* recovery checking accessors
@ -203,14 +186,9 @@ TransactionLogUpdate(TransactionId transactionId, /* trans id to update */
/*
* update (invalidate) our single item TransactionLogTest cache.
*
* if (status != XID_COMMIT)
*
* What's the hell ?! Why != XID_COMMIT ?!
*/
TransactionIdStore(transactionId, &cachedTestXid);
cachedTestXidStatus = status;
}
/* ----------------------------------------------------------------
@ -355,17 +333,15 @@ InitializeTransactionLog(void)
/*
* if we have a virgin database, we initialize the log relation by
* committing the AmiTransactionId (id 512) and we initialize the
* committing the AmiTransactionId and we initialize the
* variable relation by setting the next available transaction id to
* FirstTransactionId (id 514). OID initialization happens as a side
* FirstTransactionId. OID initialization happens as a side
* effect of bootstrapping in varsup.c.
*/
SpinAcquire(OidGenLockId);
if (!TransactionIdDidCommit(AmiTransactionId))
{
TransactionLogUpdate(AmiTransactionId, XID_COMMIT);
TransactionIdStore(AmiTransactionId, &cachedTestXid);
cachedTestXidStatus = XID_COMMIT;
Assert(!IsUnderPostmaster &&
ShmemVariableCache->nextXid <= FirstTransactionId);
ShmemVariableCache->nextXid = FirstTransactionId;