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Good Bye, Time Travel!

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This commit is contained in:
Vadim B. Mikheev
1997-11-02 15:27:14 +00:00
parent 6cc0a00dec
commit 32cd09ac6d
36 changed files with 265 additions and 1841 deletions
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93
src/backend/commands/vacuum.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.48 1997/09/22 07:12:33 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.49 1997/11/02 15:25:07 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -742,54 +742,60 @@ vc_scanheap(VRelStats *vacrelstats, Relation onerel,
htup = (HeapTuple) PageGetItem(page, itemid);
tupgone = false;
if (!AbsoluteTimeIsBackwardCompatiblyValid(htup->t_tmin) &&
TransactionIdIsValid((TransactionId) htup->t_xmin))
if (!(htup->t_infomask & HEAP_XMIN_COMMITTED))
{
if (TransactionIdDidAbort(htup->t_xmin))
{
if (htup->t_infomask & HEAP_XMIN_INVALID)
tupgone = true;
}
else if (TransactionIdDidCommit(htup->t_xmin))
{
htup->t_tmin = TransactionIdGetCommitTime(htup->t_xmin);
pgchanged = true;
}
else if (!TransactionIdIsInProgress(htup->t_xmin))
{
/*
* Not Aborted, Not Committed, Not in Progress - so it
* from crashed process. - vadim 11/26/96
*/
ncrash++;
tupgone = true;
}
else
{
elog(NOTICE, "Rel %s: TID %u/%u: InsertTransactionInProgress %u - can't shrink relation",
relname, blkno, offnum, htup->t_xmin);
do_shrinking = false;
if (TransactionIdDidAbort(htup->t_xmin))
tupgone = true;
else if (TransactionIdDidCommit(htup->t_xmin))
{
htup->t_infomask |= HEAP_XMIN_COMMITTED;
pgchanged = true;
}
else if (!TransactionIdIsInProgress(htup->t_xmin))
{
/*
* Not Aborted, Not Committed, Not in Progress -
* so it's from crashed process. - vadim 11/26/96
*/
ncrash++;
tupgone = true;
}
else
{
elog(NOTICE, "Rel %s: TID %u/%u: InsertTransactionInProgress %u - can't shrink relation",
relname, blkno, offnum, htup->t_xmin);
do_shrinking = false;
}
}
}
if (TransactionIdIsValid((TransactionId) htup->t_xmax))
/*
* here we are concerned about tuples with xmin committed
* and xmax unknown or committed
*/
if (htup->t_infomask & HEAP_XMIN_COMMITTED &&
!(htup->t_infomask & HEAP_XMAX_INVALID))
{
if (TransactionIdDidAbort(htup->t_xmax))
if (htup->t_infomask & HEAP_XMAX_COMMITTED)
tupgone = true;
else if (TransactionIdDidAbort(htup->t_xmax))
{
StoreInvalidTransactionId(&(htup->t_xmax));
htup->t_infomask |= HEAP_XMAX_INVALID;
pgchanged = true;
}
else if (TransactionIdDidCommit(htup->t_xmax))
tupgone = true;
else if (!TransactionIdIsInProgress(htup->t_xmax))
{
/*
* Not Aborted, Not Committed, Not in Progress - so it
* from crashed process. - vadim 06/02/97
*/
StoreInvalidTransactionId(&(htup->t_xmax));
htup->t_infomask |= HEAP_XMAX_INVALID;;
pgchanged = true;
}
else
@ -800,18 +806,6 @@ vc_scanheap(VRelStats *vacrelstats, Relation onerel,
}
}
/*
* Is it possible at all ? - vadim 11/26/96
*/
if (!TransactionIdIsValid((TransactionId) htup->t_xmin))
{
elog(NOTICE, "Rel %s: TID %u/%u: INSERT_TRANSACTION_ID IS INVALID. \
DELETE_TRANSACTION_ID_VALID %d, TUPGONE %d.",
relname, blkno, offnum,
TransactionIdIsValid((TransactionId) htup->t_xmax),
tupgone);
}
/*
* It's possibly! But from where it comes ? And should we fix
* it ? - vadim 11/28/96
@ -973,7 +967,6 @@ vc_rpfheap(VRelStats *vacrelstats, Relation onerel,
{
TransactionId myXID;
CommandId myCID;
AbsoluteTime myCTM = 0;
Buffer buf,
ToBuf;
int nblocks,
@ -1187,9 +1180,9 @@ vc_rpfheap(VRelStats *vacrelstats, Relation onerel,
TransactionIdStore(myXID, &(newtup->t_xmin));
newtup->t_cmin = myCID;
StoreInvalidTransactionId(&(newtup->t_xmax));
newtup->t_tmin = INVALID_ABSTIME;
newtup->t_tmax = CURRENT_ABSTIME;
ItemPointerSetInvalid(&newtup->t_chain);
/* set xmin to unknown and xmax to invalid */
newtup->t_infomask &= ~(HEAP_XACT_MASK);
newtup->t_infomask |= HEAP_XMAX_INVALID;
/* add tuple to the page */
newoff = PageAddItem(ToPage, (Item) newtup, tlen,
@ -1209,7 +1202,8 @@ failed to add item with len = %u to page %u (free space %u, nusd %u, noff %u)",
/* now logically delete end-tuple */
TransactionIdStore(myXID, &(htup->t_xmax));
htup->t_cmax = myCID;
memmove((char *) &(htup->t_chain), (char *) &(newtup->t_ctid), sizeof(newtup->t_ctid));
/* set xmax to unknown */
htup->t_infomask &= ~(HEAP_XMAX_INVALID | HEAP_XMAX_COMMITTED);
ToVpd->vpd_nusd++;
nmoved++;
@ -1278,11 +1272,10 @@ failed to add item with len = %u to page %u (free space %u, nusd %u, noff %u)",
FlushBufferPool(!TransactionFlushEnabled());
TransactionIdCommit(myXID);
FlushBufferPool(!TransactionFlushEnabled());
myCTM = TransactionIdGetCommitTime(myXID);
}
/*
* Clean uncleaned reapped pages from Vvpl list and set commit' times
* Clean uncleaned reapped pages from Vvpl list and set xmin committed
* for inserted tuples
*/
nchkmvd = 0;
@ -1316,7 +1309,7 @@ failed to add item with len = %u to page %u (free space %u, nusd %u, noff %u)",
htup = (HeapTuple) PageGetItem(page, itemid);
if (TransactionIdEquals((TransactionId) htup->t_xmin, myXID))
{
htup->t_tmin = myCTM;
htup->t_infomask |= HEAP_XMIN_COMMITTED;
ntups++;
}
}