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Replace XLogRecPtr struct with a 64-bit integer.

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This simplifies code that needs to do arithmetic on XLogRecPtrs.

To avoid changing on-disk format of data pages, the LSN on data pages is
still stored in the old format. That should keep pg_upgrade happy. However,
we have XLogRecPtrs embedded in the control file, and in the structs that
are sent over the replication protocol, so this changes breaks compatibility
of pg_basebackup and server. I didn't do anything about this in this patch,
per discussion on -hackers, the right thing to do would to be to change the
replication protocol to be architecture-independent, so that you could use
a newer version of pg_receivexlog, for example, against an older server
version.
This commit is contained in:
Heikki Linnakangas
2012-06-24 18:51:37 +03:00
parent 061e7efb1b
commit 0ab9d1c4b3
28 changed files with 279 additions and 357 deletions
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3
src/backend/access/transam/twophase.c
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@@ -333,8 +333,7 @@ MarkAsPreparing(TransactionId xid, const char *gid,
gxact->prepared_at = prepared_at;
/* initialize LSN to 0 (start of WAL) */
gxact->prepare_lsn.xlogid = 0;
gxact->prepare_lsn.xrecoff = 0;
gxact->prepare_lsn = 0;
gxact->owner = owner;
gxact->locking_xid = xid;
gxact->valid = false;