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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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15
src/include/access/clog.h
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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/include/access/clog.h,v 1.8 2003/11/29 22:40:55 pgsql Exp $
* $PostgreSQL: pgsql/src/include/access/clog.h,v 1.9 2004/07/01 00:51:38 tgl Exp $
*/
#ifndef CLOG_H
#define CLOG_H
@@ -16,13 +16,16 @@
/*
* Possible transaction statuses --- note that all-zeroes is the initial
* state.
*
* A "subcommitted" transaction is a committed subtransaction whose parent
* hasn't committed or aborted yet.
*/
typedef int XidStatus;
#define TRANSACTION_STATUS_IN_PROGRESS 0x00
#define TRANSACTION_STATUS_COMMITTED 0x01
#define TRANSACTION_STATUS_ABORTED 0x02
/* 0x03 is available without changing commit log space allocation */
#define TRANSACTION_STATUS_SUB_COMMITTED 0x03
/* exported because lwlock.c needs it */
#define NUM_CLOG_BUFFERS 8
@@ -39,12 +42,6 @@ extern void ShutdownCLOG(void);
extern void CheckPointCLOG(void);
extern void ExtendCLOG(TransactionId newestXact);
extern void TruncateCLOG(TransactionId oldestXact);
/* XLOG stuff */
#define CLOG_ZEROPAGE 0x00
extern void clog_redo(XLogRecPtr lsn, XLogRecord *record);
extern void clog_undo(XLogRecPtr lsn, XLogRecord *record);
extern void clog_desc(char *buf, uint8 xl_info, char *rec);
extern void clog_zeropage_redo(int pageno);
#endif /* CLOG_H */