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