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7d05310828
recreated since the start of our transaction, our first reference to it errored out because we'd try to reuse our old relcache entry for it. Do this by accepting SI inval messages just before relcache search in heap_openr, so that dead relcache entries will be flushed before we search. Also, break heap_open/openr into two pairs of routines, relation_open(r) and heap_open(r). The relation_open routines make no tests on relkind and so can be used to open anything that has a pg_class entry. The heap_open routines are wrappers that add a relkind test to preserve their established behavior. Use the relation_open routines in several places that had various kluge solutions for opening rels that might be either heap or index rels. Also, remove the old 'heap stats' code that's been superseded by Jan's stats collector, and clean up some inconsistencies in error reporting between the different types of ALTER TABLE.
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* genam.h
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* POSTGRES general access method definitions.
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*
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*
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* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: genam.h,v 1.30 2001/11/02 16:30:29 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef GENAM_H
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#define GENAM_H
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#include "access/itup.h"
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#include "access/relscan.h"
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#include "access/sdir.h"
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/* Struct for statistics returned by bulk-delete operation */
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typedef struct IndexBulkDeleteResult
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{
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BlockNumber num_pages; /* pages remaining in index */
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double tuples_removed; /* # removed by bulk-delete operation */
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double num_index_tuples; /* # remaining */
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} IndexBulkDeleteResult;
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/* Typedef for callback function to determine if a tuple is bulk-deletable */
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typedef bool (*IndexBulkDeleteCallback) (ItemPointer itemptr, void *state);
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/* ----------------
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* generalized index_ interface routines (in indexam.c)
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* ----------------
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*/
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extern Relation index_open(Oid relationId);
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extern Relation index_openr(const char *relationName);
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extern void index_close(Relation relation);
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extern InsertIndexResult index_insert(Relation relation,
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Datum *datum, char *nulls,
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ItemPointer heap_t_ctid,
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Relation heapRel);
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extern IndexScanDesc index_beginscan(Relation relation, bool scanFromEnd,
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uint16 numberOfKeys, ScanKey key);
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extern void index_rescan(IndexScanDesc scan, bool scanFromEnd, ScanKey key);
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extern void index_endscan(IndexScanDesc scan);
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extern void index_markpos(IndexScanDesc scan);
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extern void index_restrpos(IndexScanDesc scan);
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extern RetrieveIndexResult index_getnext(IndexScanDesc scan,
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ScanDirection direction);
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extern IndexBulkDeleteResult *index_bulk_delete(Relation relation,
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IndexBulkDeleteCallback callback,
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void *callback_state);
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extern RegProcedure index_cost_estimator(Relation relation);
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extern RegProcedure index_getprocid(Relation irel, AttrNumber attnum,
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uint16 procnum);
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extern struct FmgrInfo *index_getprocinfo(Relation irel, AttrNumber attnum,
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uint16 procnum);
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/* in genam.c */
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extern IndexScanDesc RelationGetIndexScan(Relation relation, bool scanFromEnd,
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uint16 numberOfKeys, ScanKey key);
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extern void IndexScanEnd(IndexScanDesc scan);
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#endif /* GENAM_H */
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