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Commitd7ee82e

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Add SQL-callable pg_get_object_address
This allows access to get_object_address from SQL, which is useful toobtain OID addressing information from data equivalent to that emittedby the parser. This is necessary infrastructure of a project to letreplication systems propagate object dropping events to remote servers,where the schema might be different than the server originating theDROP.This patch also adds support for OBJECT_DEFAULT to get_object_address;that is, it is now possible to refer to a column's default value.Catalog version bumped due to the new function.Reviewed by Stephen Frost, Heikki Linnakangas, Robert Haas, AndresFreund, Abhijit Menon-Sen, Adam Brightwell.
1 parent1826987 commitd7ee82e

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13 files changed

+1059
-18
lines changed

13 files changed

+1059
-18
lines changed

‎src/backend/catalog/objectaddress.c

Lines changed: 440 additions & 0 deletions
Large diffs are not rendered by default.

‎src/backend/commands/event_trigger.c

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1055,6 +1055,7 @@ EventTriggerSupportsObjectType(ObjectType obtype)
10551055
caseOBJECT_COLUMN:
10561056
caseOBJECT_COLLATION:
10571057
caseOBJECT_CONVERSION:
1058+
caseOBJECT_DEFAULT:
10581059
caseOBJECT_DOMAIN:
10591060
caseOBJECT_DOMCONSTRAINT:
10601061
caseOBJECT_EXTENSION:

‎src/backend/parser/parse_type.c

Lines changed: 30 additions & 16 deletions
Original file line numberDiff line numberDiff line change
@@ -705,13 +705,11 @@ pts_error_callback(void *arg)
705705
/*
706706
* Given a string that is supposed to be a SQL-compatible type declaration,
707707
* such as "int4" or "integer" or "character varying(32)", parse
708-
* the string and convert it to a type OID and type modifier.
709-
* If missing_ok is true, InvalidOid is returned rather than raising an error
710-
* when the type name is not found.
708+
* the string and return the result as a TypeName.
709+
* If the string cannot be parsed as a type, an error is raised.
711710
*/
712-
void
713-
parseTypeString(constchar*str,Oid*typeid_p,int32*typmod_p,
714-
boolmissing_ok)
711+
TypeName*
712+
typeStringToTypeName(constchar*str)
715713
{
716714
StringInfoDatabuf;
717715
List*raw_parsetree_list;
@@ -720,7 +718,6 @@ parseTypeString(const char *str, Oid *typeid_p, int32 *typmod_p,
720718
TypeCast*typecast;
721719
TypeName*typeName;
722720
ErrorContextCallbackptserrcontext;
723-
Typetup;
724721

725722
/* make sure we give useful error for empty input */
726723
if (strspn(str," \t\n\r\f")==strlen(str))
@@ -779,13 +776,39 @@ parseTypeString(const char *str, Oid *typeid_p, int32 *typmod_p,
779776
typecast->arg==NULL||
780777
!IsA(typecast->arg,A_Const))
781778
gotofail;
779+
782780
typeName=typecast->typeName;
783781
if (typeName==NULL||
784782
!IsA(typeName,TypeName))
785783
gotofail;
786784
if (typeName->setof)
787785
gotofail;
788786

787+
pfree(buf.data);
788+
789+
returntypeName;
790+
791+
fail:
792+
ereport(ERROR,
793+
(errcode(ERRCODE_SYNTAX_ERROR),
794+
errmsg("invalid type name \"%s\"",str)));
795+
}
796+
797+
/*
798+
* Given a string that is supposed to be a SQL-compatible type declaration,
799+
* such as "int4" or "integer" or "character varying(32)", parse
800+
* the string and convert it to a type OID and type modifier.
801+
* If missing_ok is true, InvalidOid is returned rather than raising an error
802+
* when the type name is not found.
803+
*/
804+
void
805+
parseTypeString(constchar*str,Oid*typeid_p,int32*typmod_p,boolmissing_ok)
806+
{
807+
TypeName*typeName;
808+
Typetup;
809+
810+
typeName=typeStringToTypeName(str);
811+
789812
tup=LookupTypeName(NULL,typeName,typmod_p,missing_ok);
790813
if (tup==NULL)
791814
{
@@ -808,13 +831,4 @@ parseTypeString(const char *str, Oid *typeid_p, int32 *typmod_p,
808831
*typeid_p=HeapTupleGetOid(tup);
809832
ReleaseSysCache(tup);
810833
}
811-
812-
pfree(buf.data);
813-
814-
return;
815-
816-
fail:
817-
ereport(ERROR,
818-
(errcode(ERRCODE_SYNTAX_ERROR),
819-
errmsg("invalid type name \"%s\"",str)));
820834
}

‎src/include/catalog/catversion.h

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -53,6 +53,6 @@
5353
*/
5454

5555
/*yyyymmddN */
56-
#defineCATALOG_VERSION_NO201412232
56+
#defineCATALOG_VERSION_NO201412233
5757

5858
#endif

‎src/include/catalog/objectaddress.h

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -55,6 +55,7 @@ extern HeapTuple get_catalog_object_by_oid(Relation catalog,
5555
externchar*getObjectDescription(constObjectAddress*object);
5656
externchar*getObjectDescriptionOids(Oidclassid,Oidobjid);
5757

58+
externintread_objtype_from_string(constchar*objtype);
5859
externchar*getObjectTypeDescription(constObjectAddress*object);
5960
externchar*getObjectIdentity(constObjectAddress*address);
6061

‎src/include/catalog/pg_proc.h

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -3036,6 +3036,9 @@ DESCR("get identification of SQL object");
30363036
DATA(insert OID = 3839 ( pg_identify_objectPGNSP PGUID 12 1 0 0 0 f f f f t f s 3 0 2249 "26 26 23" "{26,26,23,25,25,25,25}" "{i,i,i,o,o,o,o}" "{classid,objid,subobjid,type,schema,name,identity}" _null_ pg_identify_object _null_ _null_ _null_ ));
30373037
DESCR("get machine-parseable identification of SQL object");
30383038

3039+
DATA(insert OID = 3954 ( pg_get_object_address PGNSP PGUID 12 1 0 0 0 f f f f t f s 3 0 2249 "25 1009 1009" "{25,1009,1009,26,26,23}" "{i,i,i,o,o,o}" "{type,name,args,classid,objid,subobjid}" _null_ pg_get_object_address _null_ _null_ _null_ ));
3040+
DESCR("get OID-based object address from name/args arrays");
3041+
30393042
DATA(insert OID = 2079 ( pg_table_is_visiblePGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_table_is_visible _null_ _null_ _null_ ));
30403043
DESCR("is table visible in search path?");
30413044
DATA(insert OID = 2080 ( pg_type_is_visiblePGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_type_is_visible _null_ _null_ _null_ ));

‎src/include/nodes/parsenodes.h

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1185,6 +1185,7 @@ typedef enum ObjectType
11851185
OBJECT_COLLATION,
11861186
OBJECT_CONVERSION,
11871187
OBJECT_DATABASE,
1188+
OBJECT_DEFAULT,
11881189
OBJECT_DOMAIN,
11891190
OBJECT_DOMCONSTRAINT,
11901191
OBJECT_EVENT_TRIGGER,

‎src/include/parser/parse_type.h

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -47,6 +47,7 @@ extern Datum stringTypeDatum(Type tp, char *string, int32 atttypmod);
4747

4848
externOidtypeidTypeRelid(Oidtype_id);
4949

50+
externTypeName*typeStringToTypeName(constchar*str);
5051
externvoidparseTypeString(constchar*str,Oid*typeid_p,int32*typmod_p,boolmissing_ok);
5152

5253
#defineISCOMPLEX(typeid) (typeidTypeRelid(typeid) != InvalidOid)

‎src/include/utils/builtins.h

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1201,6 +1201,9 @@ extern Datum pg_last_committed_xact(PG_FUNCTION_ARGS);
12011201
externDatumpg_describe_object(PG_FUNCTION_ARGS);
12021202
externDatumpg_identify_object(PG_FUNCTION_ARGS);
12031203

1204+
/* catalog/objectaddress.c */
1205+
externDatumpg_get_object_address(PG_FUNCTION_ARGS);
1206+
12041207
/* commands/constraint.c */
12051208
externDatumunique_key_recheck(PG_FUNCTION_ARGS);
12061209

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