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Change Assert(Ptp.t_data->t_xmax == tp.t_data->t_xmin) to : 

/*
 * Read above about cases when !ItemIdIsUsed(Citemid)
 * (child item is removed)... Due to the fact that
 * at the moment we don't remove unuseful part of
 * update-chain, it's possible to get too old
 * parent row here. Like as in the case which
 * caused this problem, we stop shrinking here.
 * I could try to find real parent row but want
 * not to do it because of real solution will
 * be implemented anyway, latter, and we are too
 * close to 6.5 release.        - vadim 06/11/99
 */
if (Ptp.t_data->t_xmax != tp.t_data->t_xmin)
...
This commit is contained in:
Vadim B. Mikheev 1999-06-11 09:35:08 +00:00
parent 3b79cc0c55
commit ba740a0917
1 changed files with 30 additions and 3 deletions
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33
src/backend/commands/vacuum.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.108 1999/06/10 14:17:07 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.109 1999/06/11 09:35:08 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -1353,8 +1353,33 @@ vc_rpfheap(VRelStats *vacrelstats, Relation onerel,
Ptp.t_data = (HeapTupleHeader) PageGetItem(Ppage, Pitemid);
Assert(ItemPointerEquals(&(vtld.new_tid),
&(Ptp.t_data->t_ctid)));
Assert(Ptp.t_data->t_xmax == tp.t_data->t_xmin);
/*
* Read above about cases when !ItemIdIsUsed(Citemid)
* (child item is removed)... Due to the fact that
* at the moment we don't remove unuseful part of
* update-chain, it's possible to get too old
* parent row here. Like as in the case which
* caused this problem, we stop shrinking here.
* I could try to find real parent row but want
* not to do it because of real solution will
* be implemented anyway, latter, and we are too
* close to 6.5 release. - vadim 06/11/99
*/
if (Ptp.t_data->t_xmax != tp.t_data->t_xmin)
{
if (freeCbuf)
ReleaseBuffer(Cbuf);
freeCbuf = false;
ReleaseBuffer(Pbuf);
for (i = 0; i < num_vtmove; i++)
{
Assert(vtmove[i].vpd->vpd_offsets_used > 0);
(vtmove[i].vpd->vpd_offsets_used)--;
}
num_vtmove = 0;
elog(NOTICE, "Too old parent tuple found - can't continue vc_rpfheap");
break;
}
#ifdef NOT_USED /* I'm not sure that this will wotk properly... */
/*
* If this tuple is updated version of row and it
@ -1382,6 +1407,8 @@ vc_rpfheap(VRelStats *vacrelstats, Relation onerel,
freeCbuf = true;
break;
}
if (num_vtmove == 0)
break;
}
if (freeCbuf)
ReleaseBuffer(Cbuf);