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Two-phase commit. Original patch by Heikki Linnakangas, with additional

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hacking by Alvaro Herrera and Tom Lane.
This commit is contained in:
Tom Lane
2005-06-17 22:32:51 +00:00
parent 5495575903
commit d0a89683a3
61 changed files with 4454 additions and 439 deletions
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38
src/include/access/xact.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/xact.h,v 1.76 2005/06/06 17:01:24 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/xact.h,v 1.77 2005/06/17 22:32:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -47,7 +47,8 @@ extern bool XactReadOnly;
typedef enum
{
XACT_EVENT_COMMIT,
XACT_EVENT_ABORT
XACT_EVENT_ABORT,
XACT_EVENT_PREPARE
} XactEvent;
typedef void (*XactCallback) (XactEvent event, void *arg);
@ -72,8 +73,11 @@ typedef void (*SubXactCallback) (SubXactEvent event, SubTransactionId mySubid,
* XLOG allows to store some information in high 4 bits of log
* record xl_info field
*/
#define XLOG_XACT_COMMIT 0x00
#define XLOG_XACT_ABORT 0x20
#define XLOG_XACT_COMMIT 0x00
#define XLOG_XACT_PREPARE 0x10
#define XLOG_XACT_ABORT 0x20
#define XLOG_XACT_COMMIT_PREPARED 0x30
#define XLOG_XACT_ABORT_PREPARED 0x40
typedef struct xl_xact_commit
{
@ -99,6 +103,31 @@ typedef struct xl_xact_abort
#define MinSizeOfXactAbort offsetof(xl_xact_abort, xnodes)
/*
* COMMIT_PREPARED and ABORT_PREPARED are identical to COMMIT/ABORT records
* except that we have to store the XID of the prepared transaction explicitly
* --- the XID in the record header will be for the transaction doing the
* COMMIT PREPARED or ABORT PREPARED command.
*/
typedef struct xl_xact_commit_prepared
{
TransactionId xid; /* XID of prepared xact */
xl_xact_commit crec; /* COMMIT record */
/* MORE DATA FOLLOWS AT END OF STRUCT */
} xl_xact_commit_prepared;
#define MinSizeOfXactCommitPrepared offsetof(xl_xact_commit_prepared, crec.xnodes)
typedef struct xl_xact_abort_prepared
{
TransactionId xid; /* XID of prepared xact */
xl_xact_abort arec; /* ABORT record */
/* MORE DATA FOLLOWS AT END OF STRUCT */
} xl_xact_abort_prepared;
#define MinSizeOfXactAbortPrepared offsetof(xl_xact_abort_prepared, arec.xnodes)
/* ----------------
* extern definitions
@ -121,6 +150,7 @@ extern void CommitTransactionCommand(void);
extern void AbortCurrentTransaction(void);
extern void BeginTransactionBlock(void);
extern bool EndTransactionBlock(void);
extern bool PrepareTransactionBlock(char *gid);
extern void UserAbortTransactionBlock(void);
extern void ReleaseSavepoint(List *options);
extern void DefineSavepoint(char *name);