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Commit3dfaea4

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Revert back-branch changes in behavior of age(xid).
Per discussion, it does not seem like a good idea to change the behavior ofage(xid) in a minor release, even though the old definition causes thefunction to fail on hot standby slaves. Therefore, revert commit5829387 and follow-on commits in the backbranches only.
1 parent56901be commit3dfaea4

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3 files changed

+2
-27
lines changed

3 files changed

+2
-27
lines changed

‎src/backend/access/transam/xact.c

Lines changed: 0 additions & 24 deletions
Original file line numberDiff line numberDiff line change
@@ -392,30 +392,6 @@ GetCurrentTransactionIdIfAny(void)
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returnCurrentTransactionState->transactionId;
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}
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/*
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*GetStableLatestTransactionId
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*
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* Get the XID once and then return same value for rest of transaction.
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* Acts as a useful reference point for maintenance tasks.
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*/
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TransactionId
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GetStableLatestTransactionId(void)
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{
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staticLocalTransactionIdlxid=InvalidLocalTransactionId;
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staticTransactionIdstablexid=InvalidTransactionId;
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if (lxid!=MyProc->lxid)
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{
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lxid=MyProc->lxid;
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stablexid=GetTopTransactionIdIfAny();
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if (!TransactionIdIsValid(stablexid))
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stablexid=ReadNewTransactionId();
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}
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Assert(TransactionIdIsValid(stablexid));
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returnstablexid;
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}
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/*
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* AssignTransactionId

‎src/backend/utils/adt/xid.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -87,13 +87,13 @@ xideq(PG_FUNCTION_ARGS)
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}
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/*
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*xid_age- compute age of an XID (relative tolatest stable xid)
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*xid_age- compute age of an XID (relative tocurrent xact)
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*/
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Datum
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xid_age(PG_FUNCTION_ARGS)
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{
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TransactionIdxid=PG_GETARG_TRANSACTIONID(0);
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TransactionIdnow=GetStableLatestTransactionId();
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TransactionIdnow=GetTopTransactionId();
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/* Permanent XIDs are always infinitely old */
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if (!TransactionIdIsNormal(xid))

‎src/include/access/xact.h

Lines changed: 0 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -198,7 +198,6 @@ extern TransactionId GetTopTransactionId(void);
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externTransactionIdGetTopTransactionIdIfAny(void);
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externTransactionIdGetCurrentTransactionId(void);
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externTransactionIdGetCurrentTransactionIdIfAny(void);
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externTransactionIdGetStableLatestTransactionId(void);
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externSubTransactionIdGetCurrentSubTransactionId(void);
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externCommandIdGetCurrentCommandId(boolused);
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externTimestampTzGetCurrentTransactionStartTimestamp(void);

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