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redo/undo support functions and cleanups.
This commit is contained in:
Vadim B. Mikheev
@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.88 2000/10/13 12:05:20 vadim Exp $
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* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.89 2000/10/20 11:01:02 vadim Exp $
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*
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*
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* INTERFACE ROUTINES
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@ -87,7 +87,16 @@
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#include "utils/relcache.h"
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#ifdef XLOG /* comments are in heap_update */
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#include "access/xlogutils.h"
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void heap_redo(XLogRecPtr lsn, XLogRecord *record);
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void heap_undo(XLogRecPtr lsn, XLogRecord *record);
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static xl_heaptid _locked_tuple_;
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static void _heap_unlock_tuple(void *data);
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static void HeapPageCleanup(Buffer buffer);
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#endif
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@ -1380,6 +1389,8 @@ heap_insert(Relation relation, HeapTuple tup)
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/* XLOG stuff */
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{
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xl_heap_insert xlrec;
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XLogRecPtr recptr;
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xlrec.target.node = relation->rd_node;
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xlrec.target.cid = GetCurrentCommandId();
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xlrec.target.tid = tup->t_self;
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@ -1388,8 +1399,8 @@ heap_insert(Relation relation, HeapTuple tup)
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xlrec.t_hoff = tup->t_data->t_hoff;
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xlrec.mask = tup->t_data->t_infomask;
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XLogRecPtr recptr = XLogInsert(RM_HEAP_ID, XLOG_HEAP_INSERT,
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(char*) xlrec, SizeOfHeapInsert,
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recptr = XLogInsert(RM_HEAP_ID, XLOG_HEAP_INSERT,
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(char*) &xlrec, SizeOfHeapInsert,
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(char*) tup->t_data + offsetof(HeapTupleHeaderData, t_bits),
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tup->t_len - offsetof(HeapTupleHeaderData, t_bits));
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@ -1493,11 +1504,13 @@ l1:
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/* XLOG stuff */
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{
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xl_heap_delete xlrec;
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XLogRecPtr recptr;
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xlrec.target.node = relation->rd_node;
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xlrec.target.cid = GetCurrentCommandId();
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xlrec.target.tid = tp.t_self;
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XLogRecPtr recptr = XLogInsert(RM_HEAP_ID, XLOG_HEAP_DELETE,
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(char*) xlrec, SizeOfHeapDelete, NULL, 0);
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recptr = XLogInsert(RM_HEAP_ID, XLOG_HEAP_DELETE,
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(char*) &xlrec, SizeOfHeapDelete, NULL, 0);
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PageSetLSN(dp, recptr);
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PageSetSUI(dp, ThisStartUpID);
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@ -1692,16 +1705,19 @@ l2:
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/* XLOG stuff */
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{
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xl_heap_update xlrec;
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XLogRecPtr recptr;
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xlrec.target.node = relation->rd_node;
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xlrec.target.cid = GetCurrentCommandId();
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xlrec.target.tid = oldtup.t_self;
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xlrec.newtid.tid = newtup->t_self;
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xlrec.newtid = newtup->t_self;
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xlrec.t_natts = newtup->t_data->t_natts;
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xlrec.t_oid = newtup->t_data->t_oid;
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xlrec.t_hoff = newtup->t_data->t_hoff;
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xlrec.mask = newtup->t_data->t_infomask;
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XLogRecPtr recptr = XLogInsert(RM_HEAP_ID, XLOG_HEAP_UPDATE,
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(char*) xlrec, SizeOfHeapUpdate,
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recptr = XLogInsert(RM_HEAP_ID, XLOG_HEAP_UPDATE,
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(char*) &xlrec, SizeOfHeapUpdate,
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(char*) newtup->t_data + offsetof(HeapTupleHeaderData, t_bits),
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newtup->t_len - offsetof(HeapTupleHeaderData, t_bits));
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@ -2000,51 +2016,26 @@ heap_restrpos(HeapScanDesc scan)
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}
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#ifdef XLOG
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void heap_redo(XLogRecPtr lsn, XLogRecord *record)
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{
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uint8 info = record->xl_info & ~XLR_INFO_MASK;
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if (info == XLOG_HEAP_INSERT)
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heap_xlog_insert(true, lsn, record);
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else if (info == XLOG_HEAP_DELETE)
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heap_xlog_delete(true, lsn, record);
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else if (info == XLOG_HEAP_UPDATE)
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heap_xlog_update(true, lsn, record);
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else if (info == XLOG_HEAP_MOVE)
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heap_xlog_move(true, lsn, record);
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else
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elog(STOP, "heap_redo: unknown op code %u", info);
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}
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void heap_undo(XLogRecPtr lsn, XLogRecord *record)
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{
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uint8 info = record->xl_info & ~XLR_INFO_MASK;
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if (info == XLOG_HEAP_INSERT)
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heap_xlog_insert(false, lsn, record);
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else if (info == XLOG_HEAP_DELETE)
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heap_xlog_delete(false, lsn, record);
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else if (info == XLOG_HEAP_UPDATE)
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heap_xlog_update(false, lsn, record);
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else if (info == XLOG_HEAP_MOVE)
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heap_xlog_move(false, lsn, record);
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else
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elog(STOP, "heap_undo: unknown op code %u", info);
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}
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void heap_xlog_delete(bool redo, XLogRecPtr lsn, XLogRecord *record)
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static void
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heap_xlog_delete(bool redo, XLogRecPtr lsn, XLogRecord *record)
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{
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xl_heap_delete *xlrec = (xl_heap_delete*) XLogRecGetData(record);
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Relation reln = XLogOpenRelation(redo, RM_HEAP_ID, xlrec->target.node);
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Buffer buffer;
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Page page;
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OffsetNumber offnum;
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ItemId lp;
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HeapTupleHeader htup;
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if (!RelationIsValid(reln))
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return;
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Buffer buffer = XLogReadBuffer(false, reln,
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buffer = XLogReadBuffer(false, reln,
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ItemPointerGetBlockNumber(&(xlrec->target.tid)));
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if (!BufferIsValid(buffer))
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return;
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Page page = (Page) BufferGetPage(buffer);
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page = (Page) BufferGetPage(buffer);
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if (PageIsNew((PageHeader) page))
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{
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PageInit(page, BufferGetPageSize(buffer), 0);
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@ -2065,8 +2056,8 @@ void heap_xlog_delete(bool redo, XLogRecPtr lsn, XLogRecord *record)
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else if (XLByteLT(PageGetLSN(page), lsn)) /* changes are not applied ?! */
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elog(STOP, "heap_delete_undo: bad page LSN");
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OffsetNumber offnum = ItemPointerGetOffsetNumber(&(xlrec->target.tid));
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ItemId lp = PageGetItemId(page, offnum);
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offnum = ItemPointerGetOffsetNumber(&(xlrec->target.tid));
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lp = PageGetItemId(page, offnum);
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if (!ItemIdIsUsed(lp) || ItemIdDeleted(lp))
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{
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@ -2084,7 +2075,7 @@ void heap_xlog_delete(bool redo, XLogRecPtr lsn, XLogRecord *record)
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UnlockAndReleaseBuffer(buffer);
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return;
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}
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HeapTupleHeader htup = (HeapTupleHeader) PageGetItem(page, lp);
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htup = (HeapTupleHeader) PageGetItem(page, lp);
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if (redo)
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{
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@ -2115,19 +2106,25 @@ void heap_xlog_delete(bool redo, XLogRecPtr lsn, XLogRecord *record)
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}
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void heap_xlog_insert(bool redo, XLogRecPtr lsn, XLogRecord *record)
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static void
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heap_xlog_insert(bool redo, XLogRecPtr lsn, XLogRecord *record)
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{
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xl_heap_insert *xlrec = (xl_heap_insert*) XLogRecGetData(record);
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Relation reln = XLogOpenRelation(redo, RM_HEAP_ID, xlrec->target.node);
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Buffer buffer;
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Page page;
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OffsetNumber offnum;
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ItemId lp;
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HeapTupleHeader htup;
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if (!RelationIsValid(reln))
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return;
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Buffer buffer = XLogReadBuffer((redo) ? true : false, reln,
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buffer = XLogReadBuffer((redo) ? true : false, reln,
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ItemPointerGetBlockNumber(&(xlrec->target.tid)));
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if (!BufferIsValid(buffer))
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return;
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Page page = (Page) BufferGetPage(buffer);
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page = (Page) BufferGetPage(buffer);
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if (PageIsNew((PageHeader) page))
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{
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PageInit(page, BufferGetPageSize(buffer), 0);
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@ -2142,16 +2139,16 @@ void heap_xlog_insert(bool redo, XLogRecPtr lsn, XLogRecord *record)
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if (redo)
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{
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char tbuf[MaxTupleSize];
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HeapTupleHeader htup = (HeapTupleHeader) tbuf;
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uint32 newlen = record->xl_len - SizeOfHeapInsert;
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if (XLByteLE(lsn, PageGetLSN(page))) /* changes are applied */
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{
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UnlockAndReleaseBuffer(buffer);
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return;
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}
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char tbuf[MaxTupleSize];
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HeapTupleHeader htup = (HeapTupleHeader) tbuf;
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uint32 newlen = record->xl_len - SizeOfHeapInsert;
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memcpy(tbuf + offsetof(HeapTupleHeaderData, t_bits),
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(char*)xlrec + SizeOfHeapInsert, newlen);
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newlen += offsetof(HeapTupleHeaderData, t_bits);
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@ -2162,10 +2159,9 @@ void heap_xlog_insert(bool redo, XLogRecPtr lsn, XLogRecord *record)
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htup->t_cmin = xlrec->target.cid;
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htup->t_infomask = HEAP_XMAX_INVALID | HEAP_XMIN_COMMITTED | xlrec->mask;
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PageManagerModeSet(OverwritePageManagerMode);
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OffsetNumber offnum = PageAddItem(page, htup, newlen,
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ItemPointerGetOffsetNumber(&(xlrec->target.tid)), LP_USED);
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PageManagerModeSet(ShufflePageManagerMode);
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offnum = PageAddItem(page, (Item)htup, newlen,
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ItemPointerGetOffsetNumber(&(xlrec->target.tid)),
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LP_USED | OverwritePageMode);
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if (offnum == InvalidOffsetNumber)
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elog(STOP, "heap_insert_redo: failed to add tuple");
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PageSetLSN(page, lsn);
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@ -2178,8 +2174,8 @@ void heap_xlog_insert(bool redo, XLogRecPtr lsn, XLogRecord *record)
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if (XLByteLT(PageGetLSN(page), lsn)) /* changes are not applied ?! */
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elog(STOP, "heap_insert_undo: bad page LSN");
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OffsetNumber offnum = ItemPointerGetOffsetNumber(&(xlrec->target.tid));
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ItemId lp = PageGetItemId(page, offnum);
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offnum = ItemPointerGetOffsetNumber(&(xlrec->target.tid));
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lp = PageGetItemId(page, offnum);
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if (!ItemIdIsUsed(lp) || ItemIdDeleted(lp))
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{
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@ -2195,11 +2191,11 @@ void heap_xlog_insert(bool redo, XLogRecPtr lsn, XLogRecord *record)
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UnlockAndReleaseBuffer(buffer);
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return;
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}
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HeapTupleHeader htup = (HeapTupleHeader) PageGetItem(page, lp);
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htup = (HeapTupleHeader) PageGetItem(page, lp);
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/* is it our tuple ? */
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if (PageGetSUI(page) != ThisStartUpID ||
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htup->t_xmin != record->xl_xid || htup->t_cmin != xlrec->target.cid)
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Assert(PageGetSUI(page) == ThisStartUpID);
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if (htup->t_xmin != record->xl_xid || htup->t_cmin != xlrec->target.cid)
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{
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if (!InRecovery)
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elog(STOP, "heap_insert_undo: invalid target tuple in rollback");
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@ -2207,33 +2203,25 @@ void heap_xlog_insert(bool redo, XLogRecPtr lsn, XLogRecord *record)
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return;
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}
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if (InRecovery || BufferIsUpdatable(buffer))
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{
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lp->lp_flags &= ~LP_USED;
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PageRepairFragmentation(page);
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UnlockAndWriteBuffer(buffer);
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}
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else /* we can't delete tuple right now */
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{
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lp->lp_flags |= LP_DELETE; /* mark for deletion */
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MarkBufferForCleanup(buffer, HeapPageCleanup);
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}
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lp->lp_flags |= LP_DELETE; /* mark for deletion */
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MarkBufferForCleanup(buffer, HeapPageCleanup);
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}
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void heap_xlog_update(bool redo, XLogRecPtr lsn, XLogRecord *record)
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static void
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heap_xlog_update(bool redo, XLogRecPtr lsn, XLogRecord *record)
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{
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xl_heap_update *xlrec = (xl_heap_update*) XLogRecGetData(record);
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Relation reln = XLogOpenRelation(redo, RM_HEAP_ID, xlrec->target.node);
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if (!RelationIsValid(reln))
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return;
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Buffer buffer;
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Page page;
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OffsetNumber offnum;
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ItemId lp;
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HeapTupleHeader htup;
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if (!RelationIsValid(reln))
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return;
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/*
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* Currently UPDATE is DELETE + INSERT and so code below are near
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* exact sum of code in heap_xlog_delete & heap_xlog_insert. We could
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@ -2339,15 +2327,15 @@ newt:;
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if (redo)
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{
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char tbuf[MaxTupleSize];
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uint32 newlen = record->xl_len - SizeOfHeapUpdate;
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if (XLByteLE(lsn, PageGetLSN(page))) /* changes are applied */
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{
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UnlockAndReleaseBuffer(buffer);
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return;
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}
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char tbuf[MaxTupleSize];
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uint32 newlen = record->xl_len - SizeOfHeapUpdate;
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htup = (HeapTupleHeader) tbuf;
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memcpy(tbuf + offsetof(HeapTupleHeaderData, t_bits),
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(char*)xlrec + SizeOfHeapUpdate, newlen);
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@ -2359,10 +2347,9 @@ newt:;
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htup->t_cmin = xlrec->target.cid;
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htup->t_infomask = HEAP_XMAX_INVALID | HEAP_XMIN_COMMITTED | xlrec->mask;
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PageManagerModeSet(OverwritePageManagerMode);
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OffsetNumber offnum = PageAddItem(page, htup, newlen,
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ItemPointerGetOffsetNumber(&(xlrec->newtid)), LP_USED);
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PageManagerModeSet(ShufflePageManagerMode);
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offnum = PageAddItem(page, (Item)htup, newlen,
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ItemPointerGetOffsetNumber(&(xlrec->newtid)),
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LP_USED | OverwritePageMode);
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if (offnum == InvalidOffsetNumber)
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elog(STOP, "heap_update_redo: failed to add tuple");
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PageSetLSN(page, lsn);
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@ -2395,8 +2382,8 @@ newt:;
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htup = (HeapTupleHeader) PageGetItem(page, lp);
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/* is it our tuple ? */
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if (PageGetSUI(page) != ThisStartUpID ||
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htup->t_xmin != record->xl_xid || htup->t_cmin != xlrec->target.cid)
|
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Assert(PageGetSUI(page) == ThisStartUpID);
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if (htup->t_xmin != record->xl_xid || htup->t_cmin != xlrec->target.cid)
|
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{
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if (!InRecovery)
|
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elog(STOP, "heap_update_undo: invalid new tuple in rollback");
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@ -2404,19 +2391,93 @@ newt:;
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return;
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}
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if (InRecovery || BufferIsUpdatable(buffer))
|
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{
|
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lp->lp_flags &= ~LP_USED;
|
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PageRepairFragmentation(page);
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UnlockAndWriteBuffer(buffer);
|
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}
|
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else /* we can't delete tuple right now */
|
||||
{
|
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lp->lp_flags |= LP_DELETE; /* mark for deletion */
|
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MarkBufferForCleanup(buffer, PageCleanup);
|
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}
|
||||
|
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lp->lp_flags |= LP_DELETE; /* mark for deletion */
|
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MarkBufferForCleanup(buffer, HeapPageCleanup);
|
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}
|
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static void
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_heap_unlock_tuple(void *data)
|
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{
|
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xl_heaptid *xltid = (xl_heaptid*) data;
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Relation reln = XLogOpenRelation(false, RM_HEAP_ID, xltid->node);
|
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Buffer buffer;
|
||||
Page page;
|
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OffsetNumber offnum;
|
||||
ItemId lp;
|
||||
HeapTupleHeader htup;
|
||||
|
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if (!RelationIsValid(reln))
|
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elog(STOP, "_heap_unlock_tuple: can't open relation");
|
||||
|
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buffer = XLogReadBuffer(false, reln,
|
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ItemPointerGetBlockNumber(&(xltid->tid)));
|
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if (!BufferIsValid(buffer))
|
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elog(STOP, "_heap_unlock_tuple: can't read buffer");
|
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|
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page = (Page) BufferGetPage(buffer);
|
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if (PageIsNew((PageHeader) page))
|
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elog(STOP, "_heap_unlock_tuple: uninitialized page");
|
||||
|
||||
offnum = ItemPointerGetOffsetNumber(&(xltid->tid));
|
||||
if (offnum > PageGetMaxOffsetNumber(page))
|
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elog(STOP, "_heap_unlock_tuple: invalid itemid");
|
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lp = PageGetItemId(page, offnum);
|
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|
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if (!ItemIdIsUsed(lp) || ItemIdDeleted(lp))
|
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elog(STOP, "_heap_unlock_tuple: unused/deleted tuple in rollback");
|
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|
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htup = (HeapTupleHeader) PageGetItem(page, lp);
|
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|
||||
if (htup->t_xmax != GetCurrentTransactionId() ||
|
||||
htup->t_cmax != GetCurrentCommandId())
|
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elog(STOP, "_heap_unlock_tuple: invalid xmax/cmax in rollback");
|
||||
htup->t_infomask &= ~HEAP_XMAX_UNLOGGED;
|
||||
htup->t_infomask |= HEAP_XMAX_INVALID;
|
||||
UnlockAndWriteBuffer(buffer);
|
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return;
|
||||
}
|
||||
|
||||
void heap_redo(XLogRecPtr lsn, XLogRecord *record)
|
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{
|
||||
uint8 info = record->xl_info & ~XLR_INFO_MASK;
|
||||
|
||||
if (info == XLOG_HEAP_INSERT)
|
||||
heap_xlog_insert(true, lsn, record);
|
||||
else if (info == XLOG_HEAP_DELETE)
|
||||
heap_xlog_delete(true, lsn, record);
|
||||
else if (info == XLOG_HEAP_UPDATE)
|
||||
heap_xlog_update(true, lsn, record);
|
||||
#ifdef NOT_USED
|
||||
else if (info == XLOG_HEAP_MOVE)
|
||||
heap_xlog_move(true, lsn, record);
|
||||
#endif
|
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else
|
||||
elog(STOP, "heap_redo: unknown op code %u", info);
|
||||
}
|
||||
|
||||
void heap_undo(XLogRecPtr lsn, XLogRecord *record)
|
||||
{
|
||||
uint8 info = record->xl_info & ~XLR_INFO_MASK;
|
||||
|
||||
if (info == XLOG_HEAP_INSERT)
|
||||
heap_xlog_insert(false, lsn, record);
|
||||
else if (info == XLOG_HEAP_DELETE)
|
||||
heap_xlog_delete(false, lsn, record);
|
||||
else if (info == XLOG_HEAP_UPDATE)
|
||||
heap_xlog_update(false, lsn, record);
|
||||
#ifdef NOT_USED
|
||||
else if (info == XLOG_HEAP_MOVE)
|
||||
heap_xlog_move(false, lsn, record);
|
||||
#endif
|
||||
else
|
||||
elog(STOP, "heap_undo: unknown op code %u", info);
|
||||
}
|
||||
|
||||
static void
|
||||
HeapPageCleanup(Buffer buffer)
|
||||
{
|
||||
Page page = (Page) BufferGetPage(buffer);
|
||||
PageRepairFragmentation(page);
|
||||
}
|
||||
|
||||
#endif /* XLOG */
|
||||
|
||||
Reference in New Issue
Block a user