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Separate snapshot management code from tuple visibility code, create a

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snapmgmt.c file for the former.  The header files have also been reorganized
in three parts: the most basic snapshot definitions are now in a new file
snapshot.h, and the also new snapmgmt.h keeps the definitions for snapmgmt.c.
tqual.h has been reduced to the bare minimum.

This patch is just a first step towards managing live snapshots within a
transaction; there is no functionality change.

Per my proposal to pgsql-patches on 20080318191940.GB27458@alvh.no-ip.org and
subsequent discussion.
This commit is contained in:
Alvaro Herrera
2008-03-26 16:20:48 +00:00
parent 2d7705e85e
commit d43b085d57
41 changed files with 345 additions and 258 deletions
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3
src/backend/access/index/indexam.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/index/indexam.c,v 1.101 2008/01/01 19:45:46 momjian Exp $
* $PostgreSQL: pgsql/src/backend/access/index/indexam.c,v 1.102 2008/03/26 16:20:46 alvherre Exp $
*
* INTERFACE ROUTINES
* index_open - open an index relation by relation OID
@@ -67,6 +67,7 @@
#include "access/transam.h"
#include "pgstat.h"
#include "utils/relcache.h"
#include "utils/snapmgmt.h"
/* ----------------------------------------------------------------