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postgresql/src/include/access/rewriteheap.h

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Make CLUSTER MVCC-safe. Heikki Linnakangas
2007-04-08 03:26:33 +02:00
/*-------------------------------------------------------------------------
*
* rewriteheap.h
* Declarations for heap rewrite support functions
*
Update copyright for 2009.
2009-01-01 18:24:05 +01:00
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
Make CLUSTER MVCC-safe. Heikki Linnakangas
2007-04-08 03:26:33 +02:00
* Portions Copyright (c) 1994-5, Regents of the University of California
*
Update copyright for 2009.
2009-01-01 18:24:05 +01:00
* $PostgreSQL: pgsql/src/include/access/rewriteheap.h,v 1.6 2009/01/01 17:23:56 momjian Exp $
Make CLUSTER MVCC-safe. Heikki Linnakangas
2007-04-08 03:26:33 +02:00
*
*-------------------------------------------------------------------------
*/
#ifndef REWRITE_HEAP_H
#define REWRITE_HEAP_H
#include "access/htup.h"
Improve our #include situation by moving pointer types away from the corresponding struct definitions. This allows other headers to avoid including certain highly-loaded headers such as rel.h and relscan.h, instead using just relcache.h, heapam.h or genam.h, which are more lightweight and thus cause less unnecessary dependencies.
2008-06-19 02:46:06 +02:00
#include "utils/relcache.h"
Make CLUSTER MVCC-safe. Heikki Linnakangas
2007-04-08 03:26:33 +02:00
/* struct definition is private to rewriteheap.c */
typedef struct RewriteStateData *RewriteState;
extern RewriteState begin_heap_rewrite(Relation NewHeap,
Move the tuple freezing point in CLUSTER to a point further back in the past, to avoid losing useful Xid information in not-so-old tuples. This makes CLUSTER behave the same as VACUUM as far a tuple-freezing behavior goes (though CLUSTER does not yet advance the table's relfrozenxid). While at it, move the actual freezing operation in rewriteheap.c to a more appropriate place, and document it thoroughly. This part of the patch from Tom Lane.
2007-05-17 17:28:29 +02:00
TransactionId OldestXmin, TransactionId FreezeXid,
bool use_wal);
Make CLUSTER MVCC-safe. Heikki Linnakangas
2007-04-08 03:26:33 +02:00
extern void end_heap_rewrite(RewriteState state);
extern void rewrite_heap_tuple(RewriteState state, HeapTuple oldTuple,
Move the tuple freezing point in CLUSTER to a point further back in the past, to avoid losing useful Xid information in not-so-old tuples. This makes CLUSTER behave the same as VACUUM as far a tuple-freezing behavior goes (though CLUSTER does not yet advance the table's relfrozenxid). While at it, move the actual freezing operation in rewriteheap.c to a more appropriate place, and document it thoroughly. This part of the patch from Tom Lane.
2007-05-17 17:28:29 +02:00
HeapTuple newTuple);
Make CLUSTER MVCC-safe. Heikki Linnakangas
2007-04-08 03:26:33 +02:00
extern void rewrite_heap_dead_tuple(RewriteState state, HeapTuple oldTuple);
pgindent run for 8.3.
2007-11-15 22:14:46 +01:00
#endif /* REWRITE_HEAP_H */