MDEV-35021 Behavior for RTREE indexes changed, assertion fails

disallow USING RTREE for not SPATIAL index

mysql-test/main/create_drop_index.result

@@ -42,3 +42,11 @@ t1	CREATE TABLE `t1` (
 DROP TABLE t1;
 CREATE OR REPLACE INDEX IF NOT EXISTS i1 ON t1(b,a);
 ERROR HY000: Incorrect usage of OR REPLACE and IF NOT EXISTS
+#
+# MDEV-35021 Behavior for RTREE indexes changed, assertion fails
+#
+create table t (f int not null);
+create index ind using rtree on t (f);
+ERROR HY000: Incorrect arguments to RTREE INDEX
+drop table t;
+# End of 11.7 tests

mysql-test/main/create_drop_index.test

@@ -14,3 +14,13 @@ DROP TABLE t1;
 
 --error ER_WRONG_USAGE
 CREATE OR REPLACE INDEX IF NOT EXISTS i1 ON t1(b,a);
+
+--echo #
+--echo # MDEV-35021 Behavior for RTREE indexes changed, assertion fails
+--echo #
+create table t (f int not null);
+--error ER_WRONG_ARGUMENTS
+create index ind using rtree on t (f);
+drop table t;
+
+--echo # End of 11.7 tests

sql/sql_table.cc

@@ -3347,7 +3347,7 @@ mysql_prepare_create_table_finalize(THD *thd, HA_CREATE_INFO *create_info,
 	my_error(ER_TABLE_CANT_HANDLE_SPKEYS, MYF(0), file->table_type());
         DBUG_RETURN(TRUE);
       }
-      if (key_info->user_defined_key_parts != 1)
+      if (key->type != Key::SPATIAL || key_info->user_defined_key_parts != 1)
       {
 	my_error(ER_WRONG_ARGUMENTS, MYF(0), "RTREE INDEX");
 	DBUG_RETURN(TRUE);