58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/*-------------------------------------------------------------------------
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*
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* rewriteheap.h
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* Declarations for heap rewrite support functions
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*
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* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994-5, Regents of the University of California
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*
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* src/include/access/rewriteheap.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef REWRITE_HEAP_H
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#define REWRITE_HEAP_H
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#include "access/htup.h"
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#include "storage/itemptr.h"
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#include "storage/relfilelocator.h"
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#include "utils/relcache.h"
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/* struct definition is private to rewriteheap.c */
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typedef struct RewriteStateData *RewriteState;
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extern RewriteState begin_heap_rewrite(Relation old_heap, Relation new_heap,
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TransactionId oldest_xmin, TransactionId freeze_xid,
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MultiXactId cutoff_multi);
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extern void end_heap_rewrite(RewriteState state);
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extern void rewrite_heap_tuple(RewriteState state, HeapTuple old_tuple,
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HeapTuple new_tuple);
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extern bool rewrite_heap_dead_tuple(RewriteState state, HeapTuple old_tuple);
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/*
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* On-Disk data format for an individual logical rewrite mapping.
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*/
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typedef struct LogicalRewriteMappingData
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{
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RelFileLocator old_locator;
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RelFileLocator new_locator;
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ItemPointerData old_tid;
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ItemPointerData new_tid;
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} LogicalRewriteMappingData;
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/* ---
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* The filename consists of the following, dash separated,
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* components:
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* 1) database oid or InvalidOid for shared relations
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* 2) the oid of the relation
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* 3) upper 32bit of the LSN at which a rewrite started
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* 4) lower 32bit of the LSN at which a rewrite started
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* 5) xid we are mapping for
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* 6) xid of the xact performing the mapping
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* ---
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*/
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#define LOGICAL_REWRITE_FORMAT "map-%x-%x-%X_%X-%x-%x"
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extern void CheckPointLogicalRewriteHeap(void);
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#endif /* REWRITE_HEAP_H */
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