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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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5
src/include/access/relscan.h
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@@ -7,16 +7,17 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/relscan.h,v 1.60 2008/01/14 01:39:09 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/relscan.h,v 1.61 2008/03/26 16:20:48 alvherre Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef RELSCAN_H
#define RELSCAN_H
#include "access/htup.h"
#include "access/skey.h"
#include "storage/bufpage.h"
#include "utils/tqual.h"
#include "utils/snapshot.h"
typedef struct HeapScanDescData