--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * pg_largeobject.c
+ * routines to support manipulation of the pg_largeobject relation
+ *
+ * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ *
+ * IDENTIFICATION
+ * $Header: /cvsroot/pgsql/src/backend/catalog/pg_largeobject.c,v 1.1 2000/10/08 03:18:53 momjian Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include "access/genam.h"
+#include "access/heapam.h"
+#include "access/itup.h"
+#include "catalog/catname.h"
+#include "catalog/indexing.h"
+#include "catalog/pg_largeobject.h"
+#include "miscadmin.h"
+#include "parser/parse_func.h"
+#include "utils/builtins.h"
+#include "utils/syscache.h"
+
+bytea *_byteain(const char *data, int32 size);
+
+bytea *_byteain(const char *data, int32 size) {
+ bytea *result;
+
+ result = (bytea *)palloc(size + VARHDRSZ);
+ result->vl_len = size + VARHDRSZ;
+ if (size > 0)
+ memcpy(result->vl_dat, data, size);
+
+ return result;
+}
+
+Oid LargeobjectCreate(Oid loid) {
+ Oid retval;
+ Relation pg_largeobject;
+ HeapTuple ntup = (HeapTuple) palloc(sizeof(HeapTupleData));
+ Relation idescs[Num_pg_largeobject_indices];
+ Datum values[Natts_pg_largeobject];
+ char nulls[Natts_pg_largeobject];
+ int i;
+
+ for (i=0; i
+ nulls[i] = ' ';
+ values[i] = (Datum)NULL;
+ }
+
+ i = 0;
+ values[i++] = ObjectIdGetDatum(loid);
+ values[i++] = Int32GetDatum(0);
+ values[i++] = (Datum) _byteain(NULL, 0);
+
+ pg_largeobject = heap_openr(LargeobjectRelationName, RowExclusiveLock);
+ ntup = heap_formtuple(pg_largeobject->rd_att, values, nulls);
+ retval = heap_insert(pg_largeobject, ntup);
+
+ if (!IsIgnoringSystemIndexes()) {
+ CatalogOpenIndices(Num_pg_largeobject_indices, Name_pg_largeobject_indices, idescs);
+ CatalogIndexInsert(idescs, Num_pg_largeobject_indices, pg_largeobject, ntup);
+ CatalogCloseIndices(Num_pg_largeobject_indices, idescs);
+ }
+
+ heap_close(pg_largeobject, RowExclusiveLock);
+ heap_freetuple(ntup);
+
+ CommandCounterIncrement();
+
+ return retval;
+}
+
+void LargeobjectDrop(Oid loid) {
+ Relation pg_largeobject;
+ Relation pg_lo_id;
+ ScanKeyData skey;
+ IndexScanDesc sd = (IndexScanDesc) NULL;
+ RetrieveIndexResult indexRes;
+ int found = 0;
+
+ ScanKeyEntryInitialize(&skey,
+ (bits16) 0x0,
+ (AttrNumber) 1,
+ (RegProcedure) F_OIDEQ,
+ ObjectIdGetDatum(loid));
+
+ pg_largeobject = heap_openr(LargeobjectRelationName, RowShareLock);
+ pg_lo_id = index_openr(LargeobjectLOIdIndex);
+
+ sd = index_beginscan(pg_lo_id, false, 1, &skey);
+
+ while((indexRes = index_getnext(sd, ForwardScanDirection))) {
+ found++;
+ heap_delete(pg_largeobject, &indexRes->heap_iptr, NULL);
+ pfree(indexRes);
+ }
+
+ index_endscan(sd);
+
+ index_close(pg_lo_id);
+ heap_close(pg_largeobject, RowShareLock);
+ if (found == 0)
+ elog(ERROR, "LargeobjectDrop: large object %d not found", loid);
+}
+
+int LargeobjectFind(Oid loid) {
+ int retval = 0;
+ Relation pg_lo_id;
+ ScanKeyData skey;
+ IndexScanDesc sd = (IndexScanDesc) NULL;
+ RetrieveIndexResult indexRes;
+
+ ScanKeyEntryInitialize(&skey,
+ (bits16) 0x0,
+ (AttrNumber) 1,
+ (RegProcedure) F_OIDEQ,
+ ObjectIdGetDatum(loid));
+
+ pg_lo_id = index_openr(LargeobjectLOIdIndex);
+
+ sd = index_beginscan(pg_lo_id, false, 1, &skey);
+
+ if ((indexRes = index_getnext(sd, ForwardScanDirection))) {
+ retval = 1;
+ pfree(indexRes);
+ }
+
+ index_endscan(sd);
+
+ index_close(pg_lo_id);
+ return retval;
+}
+
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/libpq/be-fsstubs.c,v 1.50 2000/07/17 03:04:54 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/libpq/be-fsstubs.c,v 1.51 2000/10/08 03:18:54 momjian Exp $
*
* NOTES
* This should be moved to a more appropriate place. It is here
PG_RETURN_OID(InvalidOid);
}
- lobjId = RelationGetRelid(lobjDesc->heap_r);
+ lobjId = lobjDesc->id;
inv_close(lobjDesc);
{
if (cookies[i] != NULL)
{
+/*
if (isCommit)
inv_cleanindex(cookies[i]);
+*/
cookies[i] = NULL;
}
}
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/storage/large_object/inv_api.c,v 1.74 2000/07/14 22:17:48 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/storage/large_object/inv_api.c,v 1.75 2000/10/08 03:18:54 momjian Exp $
*
*-------------------------------------------------------------------------
*/
{
Assert(PointerIsValid(obj_desc));
- if (obj_desc->iscan != (IndexScanDesc) NULL)
- {
- index_endscan(obj_desc->iscan);
- obj_desc->iscan = NULL;
- }
-
+ if (obj_desc->flags & IFS_WRLOCK)
+ heap_close(obj_desc->heap_r, RowExclusiveLock);
+ else if (obj_desc->flags & IFS_RDLOCK)
+ heap_close(obj_desc->heap_r, AccessShareLock);
index_close(obj_desc->index_r);
- heap_close(obj_desc->heap_r, AccessShareLock);
-
pfree(obj_desc);
}
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Id: catname.h,v 1.12 2000/01/26 05:57:56 momjian Exp $
+ * $Id: catname.h,v 1.13 2000/10/08 03:18:55 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#define InheritsRelationName "pg_inherits"
#define InheritancePrecidenceListRelationName "pg_ipl"
#define LanguageRelationName "pg_language"
+#define LargeobjectRelationName "pg_largeobject"
#define ListenerRelationName "pg_listener"
#define LogRelationName "pg_log"
#define OperatorClassRelationName "pg_opclass"
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Id: indexing.h,v 1.40 2000/06/17 04:56:30 tgl Exp $
+ * $Id: indexing.h,v 1.41 2000/10/08 03:18:55 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#define Num_pg_index_indices 2
#define Num_pg_inherits_indices 1
#define Num_pg_language_indices 2
+#define Num_pg_largeobject_indices 2
#define Num_pg_listener_indices 1
#define Num_pg_opclass_indices 2
#define Num_pg_operator_indices 2
extern char *Name_pg_index_indices[];
extern char *Name_pg_inherits_indices[];
extern char *Name_pg_language_indices[];
+extern char *Name_pg_largeobject_indices[];
extern char *Name_pg_listener_indices[];
extern char *Name_pg_opclass_indices[];
extern char *Name_pg_operator_indices[];
--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * pg_largeobject.h
+ * definition of the system "largeobject" relation (pg_largeobject)
+ * along with the relation's initial contents.
+ *
+ *
+ * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: pg_largeobject.h,v 1.1 2000/10/08 03:18:56 momjian Exp $
+ *
+ * NOTES
+ * the genbki.sh script reads this file and generates .bki
+ * information from the DATA() statements.
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_LARGEOBJECT_H
+#define PG_LARGEOBJECT_H
+
+/* ----------------
+ * postgres.h contains the system type definintions and the
+ * CATALOG(), BOOTSTRAP and DATA() sugar words so this file
+ * can be read by both genbki.sh and the C compiler.
+ * ----------------
+ */
+
+/* ----------------
+ * pg_largeobject definition. cpp turns this into
+ * typedef struct FormData_pg_largeobject. Large object id
+ * is stored in loid;
+ * ----------------
+ */
+
+CATALOG(pg_largeobject)
+{
+ Oid loid;
+ int4 pageno;
+ bytea data;
+} FormData_pg_largeobject;
+
+/* ----------------
+ * Form_pg_largeobject corresponds to a pointer to a tuple with
+ * the format of pg_largeobject relation.
+ * ----------------
+ */
+typedef FormData_pg_largeobject *Form_pg_largeobject;
+
+/* ----------------
+ * compiler constants for pg_largeobject
+ * ----------------
+ */
+#define Natts_pg_largeobject 3
+#define Anum_pg_largeobject_loid 1
+#define Anum_pg_largeobject_pageno 2
+#define Anum_pg_largeobject_data 3
+
+Oid LargeobjectCreate(Oid loid);
+void LargeobjectDrop(Oid loid);
+int LargeobjectFind(Oid loid);
+
+#endif /* PG_LARGEOBJECT_H */
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Id: large_object.h,v 1.13 2000/01/26 05:58:33 momjian Exp $
+ * $Id: large_object.h,v 1.14 2000/10/08 03:18:57 momjian Exp $
*
*-------------------------------------------------------------------------
*/
/*
* This structure will eventually have lots more stuff associated with it.
*/
-typedef struct LargeObjectDesc
-{
- Relation heap_r; /* heap relation */
- Relation index_r; /* index relation on seqno attribute */
- IndexScanDesc iscan; /* index scan we're using */
- TupleDesc hdesc; /* heap relation tuple desc */
- TupleDesc idesc; /* index relation tuple desc */
- uint32 lowbyte; /* low byte on the current page */
- uint32 highbyte; /* high byte on the current page */
+typedef struct LargeObjectDesc {
+ Relation heap_r;
+ Relation index_r;
uint32 offset; /* current seek pointer */
- ItemPointerData htid; /* tid of current heap tuple */
+ Oid id;
#define IFS_RDLOCK (1 << 0)
#define IFS_WRLOCK (1 << 1)
extern int inv_read(LargeObjectDesc *obj_desc, char *buf, int nbytes);
extern int inv_write(LargeObjectDesc *obj_desc, char *buf, int nbytes);
-/* added for buffer leak prevention [ PA ] */
-extern void inv_cleanindex(LargeObjectDesc *obj_desc);
-
#endif /* LARGE_OBJECT_H */
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