62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
/* -------------------------------------------------------------------------
|
|
*
|
|
* rewriteheap.h
|
|
* Declarations for heap rewrite support functions
|
|
*
|
|
* Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
|
|
* Portions Copyright (c) 1994-5, Regents of the University of California
|
|
*
|
|
* src/include/access/rewriteheap.h
|
|
*
|
|
* -------------------------------------------------------------------------
|
|
*/
|
|
#ifndef REWRITE_HEAP_H
|
|
#define REWRITE_HEAP_H
|
|
|
|
#include "access/htup.h"
|
|
#include "access/ustore/knl_utuple.h"
|
|
#include "storage/item/itemptr.h"
|
|
#include "storage/smgr/relfilenode.h"
|
|
#include "utils/relcache.h"
|
|
|
|
/* struct definition is private to rewriteheap.c */
|
|
typedef struct RewriteStateData* RewriteState;
|
|
|
|
extern RewriteState begin_heap_rewrite(
|
|
Relation OldHeap, Relation NewHeap, TransactionId OldestXmin, TransactionId FreezeXid, bool use_wal);
|
|
extern void end_heap_rewrite(RewriteState state);
|
|
extern void rewrite_heap_tuple(RewriteState state, HeapTuple oldTuple, HeapTuple newTuple);
|
|
extern void RewriteUHeapTuple(RewriteState state, UHeapTuple oldTuple, UHeapTuple newTuple);
|
|
extern bool rewrite_heap_dead_tuple(RewriteState state, HeapTuple oldTuple);
|
|
|
|
// private memory context must be used for forming new tuples and caching them
|
|
//
|
|
extern MemoryContext get_heap_rewrite_memcxt(RewriteState state);
|
|
extern bool use_heap_rewrite_memcxt(RewriteState state);
|
|
extern void RewriteAndCompressTup(RewriteState state, HeapTuple old_tuple, HeapTuple new_tuple);
|
|
/*
|
|
* On-Disk data format for an individual logical rewrite mapping.
|
|
*/
|
|
typedef struct LogicalRewriteMappingData {
|
|
RelFileNode old_node;
|
|
RelFileNode new_node;
|
|
ItemPointerData old_tid;
|
|
ItemPointerData new_tid;
|
|
} LogicalRewriteMappingData;
|
|
|
|
/* ---
|
|
* The filename consists out of the following, dash separated,
|
|
* components:
|
|
* 1) database oid or InvalidOid for shared relations
|
|
* 2) the oid of the relation
|
|
* 3) xid we are mapping for
|
|
* 4) upper 32bit of the LSN at which a rewrite started
|
|
* 5) lower 32bit of the LSN at which a rewrite started
|
|
* 6) xid of the xact performing the mapping
|
|
* ---
|
|
*/
|
|
#define LOGICAL_REWRITE_FORMAT "map-%x-%x-%X_%X-%lx-%lx"
|
|
void CheckPointLogicalRewriteHeap(void);
|
|
|
|
#endif /* REWRITE_HEAP_H */
|