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Now that xmax and cmin are distinct fields again, we should zero xmax when 

creating a new tuple.  This is just for debugging sanity, though, since
nothing should be paying any attention to xmax when the HEAP_XMAX_INVALID
bit is set.
This commit is contained in:
Tom Lane 2004-09-17 18:09:55 +00:00
parent 12ce26f8da
commit 054b78ba38
1 changed files with 5 additions and 3 deletions
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8
src/backend/access/heap/heapam.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/heap/heapam.c,v 1.175 2004/09/16 16:58:25 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/heap/heapam.c,v 1.176 2004/09/17 18:09:55 tgl Exp $
*
*
* INTERFACE ROUTINES
@ -1142,7 +1142,8 @@ heap_insert(Relation relation, HeapTuple tup, CommandId cid)
tup->t_data->t_infomask |= HEAP_XMAX_INVALID;
HeapTupleHeaderSetXmin(tup->t_data, xid);
HeapTupleHeaderSetCmin(tup->t_data, cid);
HeapTupleHeaderSetCmax(tup->t_data, 0); /* zero out Datum fields */
HeapTupleHeaderSetXmax(tup->t_data, 0); /* zero out Datum fields */
HeapTupleHeaderSetCmax(tup->t_data, 0); /* for cleanliness */
tup->t_tableOid = relation->rd_id;
/*
@ -1608,7 +1609,8 @@ l2:
newtup->t_data->t_infomask |= (HEAP_XMAX_INVALID | HEAP_UPDATED);
HeapTupleHeaderSetXmin(newtup->t_data, xid);
HeapTupleHeaderSetCmin(newtup->t_data, cid);
HeapTupleHeaderSetCmax(newtup->t_data, 0); /* zero out Datum fields */
HeapTupleHeaderSetXmax(newtup->t_data, 0); /* zero out Datum fields */
HeapTupleHeaderSetCmax(newtup->t_data, 0); /* for cleanliness */
/*
* If the toaster needs to be activated, OR if the new tuple will not