mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-09-28 00:31:51 +02:00
4b21acf522
access/heapam contains functions that are very storage specific (say heap_insert() and a lot of lower level functions), and fairly generic infrastructure like relation_open(), heap_open() etc. In the upcoming pluggable storage work we're introducing a layer between table accesses in general and heapam, to allow for different storage methods. For a bit cleaner separation it thus seems advantageous to move generic functions like the aforementioned to their own headers. access/relation.h will contain relation_open() etc, and access/table.h will contain table_open() (formerly known as heap_open()). I've decided for table.h not to include relation.h, but we might change that at a later stage. relation.h already exists in another directory, but the other plausible name (rel.h) also conflicts. It'd be nice if there were a non-conflicting name, but nobody came up with a suggestion. It's possible that the appropriate way to address the naming conflict would be to rename nodes/relation.h, which isn't particularly well named. To avoid breaking a lot of extensions that just use heap_open() etc, table.h has macros mapping the old names to the new ones, and heapam.h includes relation, table.h. That also allows to keep the bulk renaming of existing callers in a separate commit. Author: Andres Freund Discussion: https://postgr.es/m/20190111000539.xbv7s6w7ilcvm7dp@alap3.anarazel.de
30 lines
974 B
C
30 lines
974 B
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* relation.h
|
|
* Generic relation related routines.
|
|
*
|
|
*
|
|
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
* src/include/access/relation.h
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
#ifndef ACCESS_RELATION_H
|
|
#define ACCESS_RELATION_H
|
|
|
|
#include "nodes/primnodes.h"
|
|
#include "utils/relcache.h"
|
|
#include "storage/lockdefs.h"
|
|
|
|
|
|
extern Relation relation_open(Oid relationId, LOCKMODE lockmode);
|
|
extern Relation try_relation_open(Oid relationId, LOCKMODE lockmode);
|
|
extern Relation relation_openrv(const RangeVar *relation, LOCKMODE lockmode);
|
|
extern Relation relation_openrv_extended(const RangeVar *relation,
|
|
LOCKMODE lockmode, bool missing_ok);
|
|
extern void relation_close(Relation relation, LOCKMODE lockmode);
|
|
|
|
#endif /* ACCESS_RELATION_H */
|