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Nested transactions. There is still much left to do, especially on the

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performance front, but with feature freeze upon us I think it's time to
drive a stake in the ground and say that this will be in 7.5.

Alvaro Herrera, with some help from Tom Lane.
This commit is contained in:
Tom Lane
2004-07-01 00:52:04 +00:00
parent 4c9aa572fa
commit 573a71a5da
74 changed files with 4516 additions and 1144 deletions
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57
src/backend/access/transam/slru.c
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/access/transam/slru.c,v 1.16 2004/05/31 03:47:54 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/slru.c,v 1.17 2004/07/01 00:49:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -16,8 +16,9 @@
#include <sys/stat.h>
#include <unistd.h>
#include "access/clog.h"
#include "access/slru.h"
#include "access/clog.h" /* only for NUM_CLOG_BUFFERS */
#include "access/subtrans.h"
#include "postmaster/bgwriter.h"
#include "storage/fd.h"
#include "storage/lwlock.h"
@@ -1025,3 +1026,55 @@ SlruScanDirectory(SlruCtl ctl, int cutoffPage, bool doDeletions)
return found;
}
/*
* SLRU resource manager's routines
*/
void
slru_redo(XLogRecPtr lsn, XLogRecord *record)
{
uint8 info = record->xl_info & ~XLR_INFO_MASK;
int pageno;
memcpy(&pageno, XLogRecGetData(record), sizeof(int));
switch (info)
{
case CLOG_ZEROPAGE:
clog_zeropage_redo(pageno);
break;
case SUBTRANS_ZEROPAGE:
subtrans_zeropage_redo(pageno);
break;
default:
elog(PANIC, "slru_redo: unknown op code %u", info);
}
}
void
slru_undo(XLogRecPtr lsn, XLogRecord *record)
{
}
void
slru_desc(char *buf, uint8 xl_info, char *rec)
{
uint8 info = xl_info & ~XLR_INFO_MASK;
if (info == CLOG_ZEROPAGE)
{
int pageno;
memcpy(&pageno, rec, sizeof(int));
sprintf(buf + strlen(buf), "clog zeropage: %d", pageno);
}
else if (info == SUBTRANS_ZEROPAGE)
{
int pageno;
memcpy(&pageno, rec, sizeof(int));
sprintf(buf + strlen(buf), "subtrans zeropage: %d", pageno);
}
else
strcat(buf, "UNKNOWN");
}