Changelog: error out if index has opclassopts

Error out if index has opclassopts.

Changelog entry on PG13:
Allow CREATE INDEX to specify the GiST signature length and maximum number of integer ranges (Nikita Glukhov)

src/backend/distributed/deparser/citus_ruleutils.c

@@ -37,6 +37,7 @@
 #include "commands/defrem.h"
 #include "commands/extension.h"
 #include "distributed/citus_ruleutils.h"
+#include "distributed/listutils.h"
 #include "distributed/multi_partitioning_utils.h"
 #include "distributed/relay_utility.h"
 #include "distributed/metadata_utility.h"
@@ -813,6 +814,11 @@ deparse_index_columns(StringInfo buffer, List *indexParameterList, List *deparse
 			appendStringInfo(buffer, "%s ",
 							 NameListToQuotedString(indexElement->opclass));
 		}
+#if PG_VERSION_NUM >= PG_VERSION_13
+		if (indexElement->opclassopts != NIL) {
+			ereport(ERROR, errmsg("citus currently doesn't support this index arguments"));
+		} 
+#endif
 
 		if (indexElement->ordering != SORTBY_DEFAULT)
 		{

src/test/regress/expected/pg13.out

@@ -153,8 +153,18 @@ CREATE TABLE my_table (a int, b myvarchar);
 SELECT create_distributed_table('my_table', 'a');
 ERROR:  type "test_pg13.myvarchar" does not exist
 CONTEXT:  while executing command on localhost:xxxxx
+CREATE TABLE test_table(a int, b tsvector);
+SELECT create_distributed_table('test_table', 'a');
+ create_distributed_table
+---------------------------------------------------------------------
+
+(1 row)
+
+-- we currently don't support this
+CREATE INDEX test_table_index ON test_table USING gist (b tsvector_ops(siglen = 100));
+ERROR:  citus currently doesn't support this index arguments
 drop schema test_pg13 cascade;
-NOTICE:  drop cascades to 9 other objects
+NOTICE:  drop cascades to 10 other objects
 DETAIL:  drop cascades to table dist_table
 drop cascades to table generated_col_table
 drop cascades to view v
@@ -164,3 +174,4 @@ drop cascades to function myvarcharout(myvarchar)
 drop cascades to type myvarchar
 drop cascades to function myvarcharin(cstring,oid,integer)
 drop cascades to table my_table
+drop cascades to table test_table

src/test/regress/sql/pg13.sql

@@ -81,4 +81,9 @@ CREATE TABLE my_table (a int, b myvarchar);
 -- like TOAST and I/O functions control (Tomas Vondra, Tom Lane)"""
 SELECT create_distributed_table('my_table', 'a');
 
+CREATE TABLE test_table(a int, b tsvector);
+SELECT create_distributed_table('test_table', 'a');
+-- we currently don't support this
+CREATE INDEX test_table_index ON test_table USING gist (b tsvector_ops(siglen = 100));
+
 drop schema test_pg13 cascade;