Add OID output argument to DefineTSConfiguration

... which is set to the OID of a copied text search config, whenever the
COPY clause is used.

This is in the spirit of commit a2e35b53.

src/backend/commands/tsearchcmds.c

@@ -964,7 +964,7 @@ makeConfigurationDependencies(HeapTuple tuple, bool removeOld,
  * CREATE TEXT SEARCH CONFIGURATION
  */
 ObjectAddress
-DefineTSConfiguration(List *names, List *parameters)
+DefineTSConfiguration(List *names, List *parameters, ObjectAddress *copied)
 {
 	Relation	cfgRel;
 	Relation	mapRel = NULL;
@@ -1013,6 +1013,14 @@ DefineTSConfiguration(List *names, List *parameters)
 				(errcode(ERRCODE_SYNTAX_ERROR),
 				 errmsg("cannot specify both PARSER and COPY options")));
 
+	/* make copied tsconfig available to callers */
+	if (copied && OidIsValid(sourceOid))
+	{
+		ObjectAddressSet(*copied,
+						 TSConfigRelationId,
+						 sourceOid);
+	}
+
 	/*
 	 * Look up source config if given.
 	 */

src/backend/tcop/utility.c

@@ -1129,7 +1129,8 @@ ProcessUtilitySlow(Node *parsetree,
 						case OBJECT_TSCONFIGURATION:
 							Assert(stmt->args == NIL);
 							DefineTSConfiguration(stmt->defnames,
-												  stmt->definition);
+												  stmt->definition,
+												  NULL);
 							break;
 						case OBJECT_COLLATION:
 							Assert(stmt->args == NIL);

src/include/commands/defrem.h

@@ -101,7 +101,8 @@ extern ObjectAddress AlterTSDictionary(AlterTSDictionaryStmt *stmt);
 extern ObjectAddress DefineTSTemplate(List *names, List *parameters);
 extern void RemoveTSTemplateById(Oid tmplId);
 
-extern ObjectAddress DefineTSConfiguration(List *names, List *parameters);
+extern ObjectAddress DefineTSConfiguration(List *names, List *parameters,
+					  ObjectAddress *copied);
 extern void RemoveTSConfigurationById(Oid cfgId);
 extern ObjectAddress AlterTSConfiguration(AlterTSConfigurationStmt *stmt);