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Remove AMI_OVERRIDE tests from tqual.c routines; they aren't necessary

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and just slow down normal operations (only fractionally, but a cycle saved
is a cycle earned).  Improve documentation of AMI_OVERRIDE behavior.
This commit is contained in:
Tom Lane
2002-05-25 20:00:12 +00:00
parent 29737d83d9
commit 4d567013cf
5 changed files with 41 additions and 51 deletions
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29
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 1.50 2001/11/05 17:46:24 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/transam.c,v 1.51 2002/05/25 20:00:11 tgl Exp $
*
* NOTES
* This file contains the high level access-method interface to the
@ -23,6 +23,18 @@
#include "access/transam.h"
/* ----------------
* Flag indicating that we are bootstrapping.
*
* Transaction ID generation is disabled during bootstrap; we just use
* BootstrapTransactionId. Also, the transaction ID status-check routines
* are short-circuited; they claim that BootstrapTransactionId has already
* committed, allowing tuples already inserted to be seen immediately.
* ----------------
*/
bool AMI_OVERRIDE = false;
static bool TransactionLogTest(TransactionId transactionId, XidStatus status);
static void TransactionLogUpdate(TransactionId transactionId,
XidStatus status);
@ -160,7 +172,10 @@ bool /* true if given transaction committed */
TransactionIdDidCommit(TransactionId transactionId)
{
if (AMI_OVERRIDE)
{
Assert(transactionId == BootstrapTransactionId);
return true;
}
return TransactionLogTest(transactionId, TRANSACTION_STATUS_COMMITTED);
}
@ -176,7 +191,10 @@ bool /* true if given transaction aborted */
TransactionIdDidAbort(TransactionId transactionId)
{
if (AMI_OVERRIDE)
{
Assert(transactionId == BootstrapTransactionId);
return false;
}
return TransactionLogTest(transactionId, TRANSACTION_STATUS_ABORTED);
}
@ -193,7 +211,10 @@ bool
TransactionIdIsInProgress(TransactionId transactionId)
{
if (AMI_OVERRIDE)
{
Assert(transactionId == BootstrapTransactionId);
return false;
}
return TransactionLogTest(transactionId, TRANSACTION_STATUS_IN_PROGRESS);
}
@ -215,9 +236,6 @@ TransactionIdIsInProgress(TransactionId transactionId)
void
TransactionIdCommit(TransactionId transactionId)
{
if (AMI_OVERRIDE)
return;
TransactionLogUpdate(transactionId, TRANSACTION_STATUS_COMMITTED);
}
@ -231,9 +249,6 @@ TransactionIdCommit(TransactionId transactionId)
void
TransactionIdAbort(TransactionId transactionId)
{
if (AMI_OVERRIDE)
return;
TransactionLogUpdate(transactionId, TRANSACTION_STATUS_ABORTED);
}