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Remove long-unused TransactionIdIsActive()

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TransactionIdIsActive() has not been used since bb38fb0d43, in 2014. There
are no known uses in extensions either and it's hard to see valid uses for
it. Therefore remove TransactionIdIsActive().

Discussion: https://postgr.es/m/odgftbtwp5oq7cxjgf4kjkmyq7ypoftmqy7eqa7w3awnouzot6@hrwnl5tdqrgu
This commit is contained in:
Andres Freund
2025-07-12 11:00:44 -04:00
parent b8e1f2d96b
commit f2c87ac04e
2 changed files with 0 additions and 53 deletions
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52
src/backend/storage/ipc/procarray.c
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@@ -1622,58 +1622,6 @@ TransactionIdIsInProgress(TransactionId xid)
return false;
}
/*
* TransactionIdIsActive -- is xid the top-level XID of an active backend?
*
* This differs from TransactionIdIsInProgress in that it ignores prepared
* transactions, as well as transactions running on the primary if we're in
* hot standby. Also, we ignore subtransactions since that's not needed
* for current uses.
*/
bool
TransactionIdIsActive(TransactionId xid)
{
bool result = false;
ProcArrayStruct *arrayP = procArray;
TransactionId *other_xids = ProcGlobal->xids;
int i;
/*
* Don't bother checking a transaction older than RecentXmin; it could not
* possibly still be running.
*/
if (TransactionIdPrecedes(xid, RecentXmin))
return false;
LWLockAcquire(ProcArrayLock, LW_SHARED);
for (i = 0; i < arrayP->numProcs; i++)
{
int pgprocno = arrayP->pgprocnos[i];
PGPROC *proc = &allProcs[pgprocno];
TransactionId pxid;
/* Fetch xid just once - see GetNewTransactionId */
pxid = UINT32_ACCESS_ONCE(other_xids[i]);
if (!TransactionIdIsValid(pxid))
continue;
if (proc->pid == 0)
continue; /* ignore prepared transactions */
if (TransactionIdEquals(pxid, xid))
{
result = true;
break;
}
}
LWLockRelease(ProcArrayLock);
return result;
}
/*
* Determine XID horizons.