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Commit38b9693

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Add support for renaming domain constraints
1 parentc2cc5c3 commit38b9693

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11 files changed

+168
-24
lines changed

11 files changed

+168
-24
lines changed

‎doc/src/sgml/ref/alter_domain.sgml‎

Lines changed: 28 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -31,6 +31,8 @@ ALTER DOMAIN <replaceable class="PARAMETER">name</replaceable>
3131
ADD <replaceable class="PARAMETER">domain_constraint</replaceable> [ NOT VALID ]
3232
ALTER DOMAIN <replaceable class="PARAMETER">name</replaceable>
3333
DROP CONSTRAINT [ IF EXISTS ] <replaceable class="PARAMETER">constraint_name</replaceable> [ RESTRICT | CASCADE ]
34+
ALTER DOMAIN <replaceable class="PARAMETER">name</replaceable>
35+
RENAME CONSTRAINT <replaceable class="PARAMETER">constraint_name</replaceable> TO <replaceable class="PARAMETER">new_constraint_name</replaceable>
3436
ALTER DOMAIN <replaceable class="PARAMETER">name</replaceable>
3537
VALIDATE CONSTRAINT <replaceable class="PARAMETER">constraint_name</replaceable>
3638
ALTER DOMAIN <replaceable class="PARAMETER">name</replaceable>
@@ -102,6 +104,15 @@ ALTER DOMAIN <replaceable class="PARAMETER">name</replaceable>
102104
</listitem>
103105
</varlistentry>
104106

107+
<varlistentry>
108+
<term>RENAME CONSTRAINT</term>
109+
<listitem>
110+
<para>
111+
This form changes the name of a constraint on a domain.
112+
</para>
113+
</listitem>
114+
</varlistentry>
115+
105116
<varlistentry>
106117
<term>VALIDATE CONSTRAINT</term>
107118
<listitem>
@@ -182,7 +193,7 @@ ALTER DOMAIN <replaceable class="PARAMETER">name</replaceable>
182193
<term><replaceable class="PARAMETER">constraint_name</replaceable></term>
183194
<listitem>
184195
<para>
185-
Name of an existing constraint to drop.
196+
Name of an existing constraint to drop or rename.
186197
</para>
187198
</listitem>
188199
</varlistentry>
@@ -225,6 +236,15 @@ ALTER DOMAIN <replaceable class="PARAMETER">name</replaceable>
225236
</listitem>
226237
</varlistentry>
227238

239+
<varlistentry>
240+
<term><replaceable class="PARAMETER">new_constraint_name</replaceable></term>
241+
<listitem>
242+
<para>
243+
The new name for the constraint.
244+
</para>
245+
</listitem>
246+
</varlistentry>
247+
228248
<varlistentry>
229249
<term><replaceable class="PARAMETER">new_owner</replaceable></term>
230250
<listitem>
@@ -288,6 +308,13 @@ ALTER DOMAIN zipcode DROP CONSTRAINT zipchk;
288308
</programlisting>
289309
</para>
290310

311+
<para>
312+
To rename a check constraint on a domain:
313+
<programlisting>
314+
ALTER DOMAIN zipcode RENAME CONSTRAINT zipchk TO zip_check;
315+
</programlisting>
316+
</para>
317+
291318
<para>
292319
To move the domain into a different schema:
293320
<programlisting>

‎src/backend/catalog/objectaddress.c‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -753,7 +753,7 @@ get_object_address_relobject(ObjectType objtype, List *objname,
753753
caseOBJECT_CONSTRAINT:
754754
address.classId=ConstraintRelationId;
755755
address.objectId=
756-
get_constraint_oid(reloid,depname,missing_ok);
756+
get_relation_constraint_oid(reloid,depname,missing_ok);
757757
address.objectSubId=0;
758758
break;
759759
default:

‎src/backend/catalog/pg_constraint.c‎

Lines changed: 60 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -736,12 +736,12 @@ AlterConstraintNamespaces(Oid ownerId, Oid oldNspId,
736736
}
737737

738738
/*
739-
*get_constraint_oid
739+
*get_relation_constraint_oid
740740
*Find a constraint on the specified relation with the specified name.
741741
*Returns constraint's OID.
742742
*/
743743
Oid
744-
get_constraint_oid(Oidrelid,constchar*conname,boolmissing_ok)
744+
get_relation_constraint_oid(Oidrelid,constchar*conname,boolmissing_ok)
745745
{
746746
Relationpg_constraint;
747747
HeapTupletuple;
@@ -793,6 +793,64 @@ get_constraint_oid(Oid relid, const char *conname, bool missing_ok)
793793
returnconOid;
794794
}
795795

796+
/*
797+
* get_domain_constraint_oid
798+
*Find a constraint on the specified domain with the specified name.
799+
*Returns constraint's OID.
800+
*/
801+
Oid
802+
get_domain_constraint_oid(Oidtypid,constchar*conname,boolmissing_ok)
803+
{
804+
Relationpg_constraint;
805+
HeapTupletuple;
806+
SysScanDescscan;
807+
ScanKeyDataskey[1];
808+
OidconOid=InvalidOid;
809+
810+
/*
811+
* Fetch the constraint tuple from pg_constraint. There may be more than
812+
* one match, because constraints are not required to have unique names;
813+
* if so, error out.
814+
*/
815+
pg_constraint=heap_open(ConstraintRelationId,AccessShareLock);
816+
817+
ScanKeyInit(&skey[0],
818+
Anum_pg_constraint_contypid,
819+
BTEqualStrategyNumber,F_OIDEQ,
820+
ObjectIdGetDatum(typid));
821+
822+
scan=systable_beginscan(pg_constraint,ConstraintTypidIndexId, true,
823+
SnapshotNow,1,skey);
824+
825+
while (HeapTupleIsValid(tuple=systable_getnext(scan)))
826+
{
827+
Form_pg_constraintcon= (Form_pg_constraint)GETSTRUCT(tuple);
828+
829+
if (strcmp(NameStr(con->conname),conname)==0)
830+
{
831+
if (OidIsValid(conOid))
832+
ereport(ERROR,
833+
(errcode(ERRCODE_DUPLICATE_OBJECT),
834+
errmsg("domain \"%s\" has multiple constraints named \"%s\"",
835+
format_type_be(typid),conname)));
836+
conOid=HeapTupleGetOid(tuple);
837+
}
838+
}
839+
840+
systable_endscan(scan);
841+
842+
/* If no such constraint exists, complain */
843+
if (!OidIsValid(conOid)&& !missing_ok)
844+
ereport(ERROR,
845+
(errcode(ERRCODE_UNDEFINED_OBJECT),
846+
errmsg("constraint \"%s\" for domain \"%s\" does not exist",
847+
conname,format_type_be(typid))));
848+
849+
heap_close(pg_constraint,AccessShareLock);
850+
851+
returnconOid;
852+
}
853+
796854
/*
797855
* Determine whether a relation can be proven functionally dependent on
798856
* a set of grouping columns. If so, return TRUE and add the pg_constraint

‎src/backend/commands/tablecmds.c‎

Lines changed: 45 additions & 16 deletions
Original file line numberDiff line numberDiff line change
@@ -2333,30 +2333,40 @@ renameatt(RenameStmt *stmt)
23332333
*/
23342334
staticvoid
23352335
rename_constraint_internal(Oidmyrelid,
2336+
Oidmytypid,
23362337
constchar*oldconname,
23372338
constchar*newconname,
23382339
boolrecurse,
23392340
boolrecursing,
23402341
intexpected_parents)
23412342
{
2342-
Relationtargetrelation;
2343+
Relationtargetrelation=NULL;
23432344
OidconstraintOid;
23442345
HeapTupletuple;
23452346
Form_pg_constraintcon;
23462347

2347-
targetrelation=relation_open(myrelid,AccessExclusiveLock);
2348-
/* don't tell it whether we're recursing; we allow changing typed tables here */
2349-
renameatt_check(myrelid,RelationGetForm(targetrelation), false);
2348+
AssertArg(!myrelid|| !mytypid);
2349+
2350+
if (mytypid)
2351+
{
2352+
constraintOid=get_domain_constraint_oid(mytypid,oldconname, false);
2353+
}
2354+
else
2355+
{
2356+
targetrelation=relation_open(myrelid,AccessExclusiveLock);
2357+
/* don't tell it whether we're recursing; we allow changing typed tables here */
2358+
renameatt_check(myrelid,RelationGetForm(targetrelation), false);
23502359

2351-
constraintOid=get_constraint_oid(myrelid,oldconname, false);
2360+
constraintOid=get_relation_constraint_oid(myrelid,oldconname, false);
2361+
}
23522362

23532363
tuple=SearchSysCache1(CONSTROID,ObjectIdGetDatum(constraintOid));
23542364
if (!HeapTupleIsValid(tuple))
23552365
elog(ERROR,"cache lookup failed for constraint %u",
23562366
constraintOid);
23572367
con= (Form_pg_constraint)GETSTRUCT(tuple);
23582368

2359-
if (con->contype==CONSTRAINT_CHECK&& !con->conisonly)
2369+
if (myrelid&&con->contype==CONSTRAINT_CHECK&& !con->conisonly)
23602370
{
23612371
if (recurse)
23622372
{
@@ -2376,7 +2386,7 @@ rename_constraint_internal(Oid myrelid,
23762386
if (childrelid==myrelid)
23772387
continue;
23782388

2379-
rename_constraint_internal(childrelid,oldconname,newconname, false, true,numparents);
2389+
rename_constraint_internal(childrelid,InvalidOid,oldconname,newconname, false, true,numparents);
23802390
}
23812391
}
23822392
else
@@ -2407,24 +2417,43 @@ rename_constraint_internal(Oid myrelid,
24072417

24082418
ReleaseSysCache(tuple);
24092419

2410-
relation_close(targetrelation,NoLock);/* close rel but keep lock */
2420+
if (targetrelation)
2421+
relation_close(targetrelation,NoLock);/* close rel but keep lock */
24112422
}
24122423

24132424
void
24142425
RenameConstraint(RenameStmt*stmt)
24152426
{
2416-
Oidrelid;
2427+
Oidrelid=InvalidOid;
2428+
Oidtypid=InvalidOid;
24172429

2418-
/* lock level taken here should match rename_constraint_internal */
2419-
relid=RangeVarGetRelidExtended(stmt->relation,AccessExclusiveLock,
2420-
false, false,
2421-
RangeVarCallbackForRenameAttribute,
2422-
NULL);
2430+
if (stmt->relationType==OBJECT_DOMAIN)
2431+
{
2432+
Relationrel;
2433+
HeapTupletup;
2434+
2435+
typid=typenameTypeId(NULL,makeTypeNameFromNameList(stmt->object));
2436+
rel=heap_open(TypeRelationId,RowExclusiveLock);
2437+
tup=SearchSysCache1(TYPEOID,ObjectIdGetDatum(typid));
2438+
if (!HeapTupleIsValid(tup))
2439+
elog(ERROR,"cache lookup failed for type %u",typid);
2440+
checkDomainOwner(tup);
2441+
ReleaseSysCache(tup);
2442+
heap_close(rel,NoLock);
2443+
}
2444+
else
2445+
{
2446+
/* lock level taken here should match rename_constraint_internal */
2447+
relid=RangeVarGetRelidExtended(stmt->relation,AccessExclusiveLock,
2448+
false, false,
2449+
RangeVarCallbackForRenameAttribute,
2450+
NULL);
2451+
}
24232452

2424-
rename_constraint_internal(relid,
2453+
rename_constraint_internal(relid,typid,
24252454
stmt->subname,
24262455
stmt->newname,
2427-
interpretInhOption(stmt->relation->inhOpt),/* recursive? */
2456+
stmt->relation ?interpretInhOption(stmt->relation->inhOpt) : false,/* recursive? */
24282457
false,/* recursing? */
24292458
0/* expected inhcount */);
24302459
}

‎src/backend/commands/typecmds.c‎

Lines changed: 1 addition & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -98,7 +98,6 @@ static OidfindRangeCanonicalFunction(List *procname, Oid typeOid);
9898
staticOidfindRangeSubtypeDiffFunction(List*procname,Oidsubtype);
9999
staticvoidvalidateDomainConstraint(Oiddomainoid,char*ccbin);
100100
staticList*get_rels_with_domain(OiddomainOid,LOCKMODElockmode);
101-
staticvoidcheckDomainOwner(HeapTupletup);
102101
staticvoidcheckEnumOwner(HeapTupletup);
103102
staticchar*domainAddConstraint(OiddomainOid,OiddomainNamespace,
104103
OidbaseTypeOid,
@@ -2794,7 +2793,7 @@ get_rels_with_domain(Oid domainOid, LOCKMODE lockmode)
27942793
* Check that the type is actually a domain and that the current user
27952794
* has permission to do ALTER DOMAIN on it. Throw an error if not.
27962795
*/
2797-
staticvoid
2796+
void
27982797
checkDomainOwner(HeapTupletup)
27992798
{
28002799
Form_pg_typetypTup= (Form_pg_type)GETSTRUCT(tup);

‎src/backend/parser/gram.y‎

Lines changed: 10 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -6529,6 +6529,16 @@ RenameStmt: ALTER AGGREGATE func_name aggr_args RENAME TO name
65296529
n->missing_ok =false;
65306530
$$ = (Node *)n;
65316531
}
6532+
|ALTERDOMAIN_Pany_nameRENAMECONSTRAINTnameTOname
6533+
{
6534+
RenameStmt *n = makeNode(RenameStmt);
6535+
n->renameType = OBJECT_CONSTRAINT;
6536+
n->relationType = OBJECT_DOMAIN;
6537+
n->object =$3;
6538+
n->subname =$6;
6539+
n->newname =$8;
6540+
$$ = (Node *)n;
6541+
}
65326542
|ALTERFOREIGNDATA_PWRAPPERnameRENAMETOname
65336543
{
65346544
RenameStmt *n = makeNode(RenameStmt);

‎src/backend/parser/parse_utilcmd.c‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -802,7 +802,7 @@ transformTableLikeClause(CreateStmtContext *cxt, TableLikeClause *table_like_cla
802802

803803
/* Copy comment on constraint */
804804
if ((table_like_clause->options&CREATE_TABLE_LIKE_COMMENTS)&&
805-
(comment=GetComment(get_constraint_oid(RelationGetRelid(relation),
805+
(comment=GetComment(get_relation_constraint_oid(RelationGetRelid(relation),
806806
n->conname, false),
807807
ConstraintRelationId,
808808
0))!=NULL)

‎src/include/catalog/pg_constraint.h‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -244,7 +244,8 @@ extern char *ChooseConstraintName(const char *name1, const char *name2,
244244

245245
externvoidAlterConstraintNamespaces(OidownerId,OidoldNspId,
246246
OidnewNspId,boolisType);
247-
externOidget_constraint_oid(Oidrelid,constchar*conname,boolmissing_ok);
247+
externOidget_relation_constraint_oid(Oidrelid,constchar*conname,boolmissing_ok);
248+
externOidget_domain_constraint_oid(Oidtypid,constchar*conname,boolmissing_ok);
248249

249250
externboolcheck_functional_grouping(Oidrelid,
250251
Indexvarno,Indexvarlevelsup,

‎src/include/commands/typecmds.h‎

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -14,6 +14,7 @@
1414
#ifndefTYPECMDS_H
1515
#defineTYPECMDS_H
1616

17+
#include"access/htup.h"
1718
#include"nodes/parsenodes.h"
1819

1920

@@ -35,6 +36,8 @@ extern void AlterDomainValidateConstraint(List *names, char *constrName);
3536
externvoidAlterDomainDropConstraint(List*names,constchar*constrName,
3637
DropBehaviorbehavior,boolmissing_ok);
3738

39+
externvoidcheckDomainOwner(HeapTupletup);
40+
3841
externList*GetDomainConstraints(OidtypeOid);
3942

4043
externvoidRenameType(RenameStmt*stmt);

‎src/test/regress/expected/domain.out‎

Lines changed: 7 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -659,3 +659,10 @@ create domain testdomain1 as int;
659659
alter domain testdomain1 rename to testdomain2;
660660
alter type testdomain2 rename to testdomain3; -- alter type also works
661661
drop domain testdomain3;
662+
--
663+
-- Renaming domain constraints
664+
--
665+
create domain testdomain1 as int constraint unsigned check (value > 0);
666+
alter domain testdomain1 rename constraint unsigned to unsigned_foo;
667+
alter domain testdomain1 drop constraint unsigned_foo;
668+
drop domain testdomain1;

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