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412229d197
myLargeObjectExists() and LargeObjectExists() had nearly identical code, except for handling snapshots. This commit renames myLargeObjectExists() to LargeObjectExistsWithSnapshot() and refactors LargeObjectExists() to call it internally, reducing duplication. Author: Yugo Nagata Reviewed-by: Fujii Masao Discussion: https://postgr.es/m/20240702163444.ab586f6075e502eb84f11b1a@sranhm.sraoss.co.jp
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/*-------------------------------------------------------------------------
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*
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* pg_largeobject.h
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* definition of the "large object" system catalog (pg_largeobject)
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*
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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, Regents of the University of California
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*
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* src/include/catalog/pg_largeobject.h
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*
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* NOTES
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* The Catalog.pm module reads this file and derives schema
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* information.
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PG_LARGEOBJECT_H
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#define PG_LARGEOBJECT_H
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#include "catalog/genbki.h"
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#include "catalog/pg_largeobject_d.h"
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#include "utils/snapshot.h"
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/* ----------------
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* pg_largeobject definition. cpp turns this into
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* typedef struct FormData_pg_largeobject
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* ----------------
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*/
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CATALOG(pg_largeobject,2613,LargeObjectRelationId)
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{
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Oid loid BKI_LOOKUP(pg_largeobject_metadata); /* Identifier of large
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* object */
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int32 pageno; /* Page number (starting from 0) */
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/* data has variable length, but we allow direct access; see inv_api.c */
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bytea data BKI_FORCE_NOT_NULL; /* Data for page (may be
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* zero-length) */
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} FormData_pg_largeobject;
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/* ----------------
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* Form_pg_largeobject corresponds to a pointer to a tuple with
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* the format of pg_largeobject relation.
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* ----------------
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*/
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typedef FormData_pg_largeobject *Form_pg_largeobject;
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DECLARE_UNIQUE_INDEX_PKEY(pg_largeobject_loid_pn_index, 2683, LargeObjectLOidPNIndexId, pg_largeobject, btree(loid oid_ops, pageno int4_ops));
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extern Oid LargeObjectCreate(Oid loid);
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extern void LargeObjectDrop(Oid loid);
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extern bool LargeObjectExists(Oid loid);
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extern bool LargeObjectExistsWithSnapshot(Oid loid, Snapshot snapshot);
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#endif /* PG_LARGEOBJECT_H */
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