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Change WAL-logging scheme for multixacts to be more like regular

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transaction IDs, rather than like subtrans; in particular, the information
now survives a database restart.  Per previous discussion, this is
essential for PITR log shipping and for 2PC.
This commit is contained in:
Tom Lane
2005-06-08 15:50:28 +00:00
parent 593badd30b
commit f5b2f60bd1
12 changed files with 560 additions and 274 deletions
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4
src/include/access/htup.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/htup.h,v 1.74 2005/04/28 21:47:17 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/htup.h,v 1.75 2005/06/08 15:50:27 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -505,6 +505,8 @@ typedef struct xl_heap_newpage
typedef struct xl_heap_lock
{
xl_heaptid target; /* locked tuple id */
TransactionId locking_xid; /* might be a MultiXactId not xid */
bool xid_is_mxact; /* is it? */
bool shared_lock; /* shared or exclusive row lock? */
} xl_heap_lock;