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Code Activity

1. WAL needs in zero-ed content of newly initialized page.

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2. Log record for PageRepaireFragmentation now keeps array
   of !LP_USED offnums to redo cleanup properly.
This commit is contained in:
Vadim B. Mikheev
2000-12-30 15:19:57 +00:00
parent 2783bd50da
commit 3e059b3802
5 changed files with 92 additions and 40 deletions
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69
src/backend/access/heap/heapam.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.104 2000/12/30 06:52:33 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.105 2000/12/30 15:19:54 vadim Exp $
*
*
* INTERFACE ROUTINES
@ -90,7 +90,8 @@
XLogRecPtr log_heap_move(Relation reln, Buffer oldbuf, ItemPointerData from,
Buffer newbuf, HeapTuple newtup);
XLogRecPtr log_heap_clean(Relation reln, Buffer buffer);
XLogRecPtr log_heap_clean(Relation reln, Buffer buffer,
char *unused, int unlen);
/* comments are in heap_update */
static xl_heaptid _locked_tuple_;
@ -2002,11 +2003,11 @@ heap_restrpos(HeapScanDesc scan)
}
XLogRecPtr
log_heap_clean(Relation reln, Buffer buffer)
log_heap_clean(Relation reln, Buffer buffer, char *unused, int unlen)
{
xl_heap_clean xlrec;
XLogRecPtr recptr;
XLogRecData rdata[2];
XLogRecData rdata[3];
xlrec.node = reln->rd_node;
xlrec.block = BufferGetBlockNumber(buffer);
@ -2015,10 +2016,20 @@ log_heap_clean(Relation reln, Buffer buffer)
rdata[0].len = SizeOfHeapClean;
rdata[0].next = &(rdata[1]);
rdata[1].buffer = buffer;
rdata[1].data = NULL;
rdata[1].len = 0;
rdata[1].next = NULL;
if (unlen > 0)
{
rdata[1].buffer = buffer;
rdata[1].data = unused;
rdata[1].len = unlen;
rdata[1].next = &(rdata[2]);
}
else
rdata[0].next = &(rdata[2]);
rdata[2].buffer = buffer;
rdata[2].data = NULL;
rdata[2].len = 0;
rdata[2].next = NULL;
recptr = XLogInsert(RM_HEAP_ID, XLOG_HEAP_CLEAN, rdata);
@ -2102,14 +2113,10 @@ log_heap_move(Relation reln, Buffer oldbuf, ItemPointerData from,
static void
heap_xlog_clean(bool redo, XLogRecPtr lsn, XLogRecord *record)
{
xl_heap_clean *xlrec = (xl_heap_clean*) XLogRecGetData(record);
xl_heap_clean *xlrec = (xl_heap_clean*) XLogRecGetData(record);
Relation reln;
Buffer buffer;
Page page;
OffsetNumber maxoff;
OffsetNumber offnum;
HeapTupleHeader htup;
ItemId lp;
if (!redo || (record->xl_info & XLR_BKP_BLOCK_1))
return;
@ -2133,23 +2140,25 @@ heap_xlog_clean(bool redo, XLogRecPtr lsn, XLogRecord *record)
return;
}
maxoff = PageGetMaxOffsetNumber(page);
for (offnum = FirstOffsetNumber;
offnum <= maxoff;
offnum = OffsetNumberNext(offnum))
if (record->xl_len > SizeOfHeapClean)
{
lp = PageGetItemId(page, offnum);
char unbuf[BLCKSZ];
OffsetNumber *unused = (OffsetNumber*)unbuf;
char *unend;
ItemId lp;
if (!ItemIdIsUsed(lp))
continue;
memcpy(unbuf, (char*)xlrec + SizeOfHeapClean, record->xl_len - SizeOfHeapClean);
unend = unbuf + (record->xl_len - SizeOfHeapClean);
htup = (HeapTupleHeader) PageGetItem(page, lp);
if (!HeapTupleSatisfiesNow(htup))
while((char*)unused < unend)
{
lp = ((PageHeader) page)->pd_linp + *unused;
lp->lp_flags &= ~LP_USED;
unused++;
}
}
PageRepairFragmentation(page);
PageRepairFragmentation(page, NULL);
UnlockAndWriteBuffer(buffer);
}
@ -2247,7 +2256,10 @@ heap_xlog_insert(bool redo, XLogRecPtr lsn, XLogRecord *record)
uint32 newlen;
if (record->xl_info & XLOG_HEAP_INIT_PAGE)
{
PageInit(page, BufferGetPageSize(buffer), 0);
PageZero(page);
}
if (XLByteLE(lsn, PageGetLSN(page))) /* changes are applied */
{
@ -2401,7 +2413,10 @@ newsame:;
uint32 newlen;
if (record->xl_info & XLOG_HEAP_INIT_PAGE)
{
PageInit(page, BufferGetPageSize(buffer), 0);
PageZero(page);
}
if (XLByteLE(lsn, PageGetLSN(page))) /* changes are applied */
{
@ -2583,6 +2598,12 @@ heap_desc(char *buf, uint8 xl_info, char* rec)
ItemPointerGetBlockNumber(&(xlrec->newtid)),
ItemPointerGetOffsetNumber(&(xlrec->newtid)));
}
else if (info == XLOG_HEAP_CLEAN)
{
xl_heap_clean *xlrec = (xl_heap_clean*) rec;
sprintf(buf + strlen(buf), "clean: node %u/%u; blk %u",
xlrec->node.tblNode, xlrec->node.relNode, xlrec->block);
}
else
strcat(buf, "UNKNOWN");
}