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Second phase of committing Rod Taylor's pg_depend/pg_constraint patch.

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pg_relcheck is gone; CHECK, UNIQUE, PRIMARY KEY, and FOREIGN KEY
constraints all have real live entries in pg_constraint.  pg_depend
exists, and RESTRICT/CASCADE options work on most kinds of DROP;
however, pg_depend is not yet very well populated with dependencies.
(Most of the ones that are present at this point just replace formerly
hardwired associations, such as the implicit drop of a relation's pg_type
entry when the relation is dropped.)  Need to add more logic to create
dependency entries, improve pg_dump to dump constraints in place of
indexes and triggers, and add some regression tests.
This commit is contained in:
Tom Lane
2002-07-12 18:43:19 +00:00
parent 791a40f943
commit 7c6df91dda
77 changed files with 4074 additions and 1987 deletions
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68
src/backend/utils/cache/relcache.c vendored
View File

@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.165 2002/06/20 20:29:39 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.166 2002/07/12 18:43:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -43,11 +43,11 @@
#include "catalog/pg_amproc.h"
#include "catalog/pg_attrdef.h"
#include "catalog/pg_attribute.h"
#include "catalog/pg_constraint.h"
#include "catalog/pg_index.h"
#include "catalog/pg_namespace.h"
#include "catalog/pg_opclass.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_relcheck.h"
#include "catalog/pg_rewrite.h"
#include "catalog/pg_type.h"
#include "commands/trigger.h"
@@ -296,7 +296,7 @@ static void RelationBuildTupleDesc(RelationBuildDescInfo buildinfo,
static Relation RelationBuildDesc(RelationBuildDescInfo buildinfo,
Relation oldrelation);
static void AttrDefaultFetch(Relation relation);
static void RelCheckFetch(Relation relation);
static void CheckConstraintFetch(Relation relation);
static List *insert_ordered_oid(List *list, Oid datum);
static void IndexSupportInitialize(Form_pg_index iform,
IndexStrategy indexStrategy,
@@ -451,7 +451,7 @@ AllocateRelationDesc(Relation relation, Form_pg_class relp)
* RelationBuildTupleDesc
*
* Form the relation's tuple descriptor from information in
* the pg_attribute, pg_attrdef & pg_relcheck system catalogs.
* the pg_attribute, pg_attrdef & pg_constraint system catalogs.
*/
static void
RelationBuildTupleDesc(RelationBuildDescInfo buildinfo,
@@ -603,7 +603,7 @@ RelationBuildTupleDesc(RelationBuildDescInfo buildinfo,
MemoryContextAlloc(CacheMemoryContext,
constr->num_check * sizeof(ConstrCheck));
MemSet(constr->check, 0, constr->num_check * sizeof(ConstrCheck));
RelCheckFetch(relation);
CheckConstraintFetch(relation);
}
else
constr->num_check = 0;
@@ -2483,62 +2483,60 @@ AttrDefaultFetch(Relation relation)
}
static void
RelCheckFetch(Relation relation)
CheckConstraintFetch(Relation relation)
{
ConstrCheck *check = relation->rd_att->constr->check;
int ncheck = relation->rd_att->constr->num_check;
Relation rcrel;
SysScanDesc rcscan;
ScanKeyData skey;
Relation conrel;
SysScanDesc conscan;
ScanKeyData skey[1];
HeapTuple htup;
Name rcname;
Datum val;
bool isnull;
int found;
int found = 0;
ScanKeyEntryInitialize(&skey,
(bits16) 0x0,
(AttrNumber) Anum_pg_relcheck_rcrelid,
(RegProcedure) F_OIDEQ,
ScanKeyEntryInitialize(&skey[0], 0x0,
Anum_pg_constraint_conrelid, F_OIDEQ,
ObjectIdGetDatum(RelationGetRelid(relation)));
rcrel = heap_openr(RelCheckRelationName, AccessShareLock);
rcscan = systable_beginscan(rcrel, RelCheckIndex, true,
SnapshotNow,
1, &skey);
found = 0;
conrel = heap_openr(ConstraintRelationName, AccessShareLock);
conscan = systable_beginscan(conrel, ConstraintRelidIndex, true,
SnapshotNow, 1, skey);
while (HeapTupleIsValid(htup = systable_getnext(rcscan)))
while (HeapTupleIsValid(htup = systable_getnext(conscan)))
{
Form_pg_constraint conform = (Form_pg_constraint) GETSTRUCT(htup);
/* We want check constraints only */
if (conform->contype != CONSTRAINT_CHECK)
continue;
if (found == ncheck)
elog(ERROR, "RelCheckFetch: unexpected record found for rel %s",
elog(ERROR, "CheckConstraintFetch: unexpected record found for rel %s",
RelationGetRelationName(relation));
rcname = (Name) fastgetattr(htup,
Anum_pg_relcheck_rcname,
rcrel->rd_att, &isnull);
if (isnull)
elog(ERROR, "RelCheckFetch: rcname IS NULL for rel %s",
RelationGetRelationName(relation));
check[found].ccname = MemoryContextStrdup(CacheMemoryContext,
NameStr(*rcname));
NameStr(conform->conname));
/* Grab and test conbin is actually set */
val = fastgetattr(htup,
Anum_pg_relcheck_rcbin,
rcrel->rd_att, &isnull);
Anum_pg_constraint_conbin,
conrel->rd_att, &isnull);
if (isnull)
elog(ERROR, "RelCheckFetch: rcbin IS NULL for rel %s",
elog(ERROR, "CheckConstraintFetch: conbin IS NULL for rel %s",
RelationGetRelationName(relation));
check[found].ccbin = MemoryContextStrdup(CacheMemoryContext,
DatumGetCString(DirectFunctionCall1(textout,
val)));
found++;
}
systable_endscan(rcscan);
heap_close(rcrel, AccessShareLock);
systable_endscan(conscan);
heap_close(conrel, AccessShareLock);
if (found != ncheck)
elog(ERROR, "RelCheckFetch: %d record(s) not found for rel %s",
elog(ERROR, "CheckConstraintFetch: %d record(s) not found for rel %s",
ncheck - found, RelationGetRelationName(relation));
}