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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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20
src/backend/access/transam/xact.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.124 2002/05/22 21:40:55 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.125 2002/05/25 20:00:12 tgl Exp $
*
* NOTES
* Transaction aborts can now occur two ways:
@ -229,13 +229,6 @@ int CommitSiblings = 5; /* number of concurrent xacts needed to
static void (*_RollbackFunc) (void *) = NULL;
static void *_RollbackData = NULL;
/* ----------------
* catalog creation transaction bootstrapping flag.
* This should be eliminated and added to the transaction
* state stuff. -cim 3/19/90
* ----------------
*/
bool AMI_OVERRIDE = false;
/* ----------------------------------------------------------------
* transaction state accessors
@ -380,6 +373,11 @@ GetCurrentTransactionStartTimeUsec(int *msec)
/* --------------------------------
* TransactionIdIsCurrentTransactionId
*
* During bootstrap, we cheat and say "it's not my transaction ID" even though
* it is. Along with transam.c's cheat to say that the bootstrap XID is
* already committed, this causes the tqual.c routines to see previously
* inserted tuples as committed, which is what we need during bootstrap.
* --------------------------------
*/
bool
@ -388,7 +386,10 @@ TransactionIdIsCurrentTransactionId(TransactionId xid)
TransactionState s = CurrentTransactionState;
if (AMI_OVERRIDE)
{
Assert(xid == BootstrapTransactionId);
return false;
}
return TransactionIdEquals(xid, s->transactionIdData);
}
@ -403,9 +404,6 @@ CommandIdIsCurrentCommandId(CommandId cid)
{
TransactionState s = CurrentTransactionState;
if (AMI_OVERRIDE)
return false;
return (cid == s->commandId) ? true : false;
}