Make the test func_json deterministic

mysql-test/main/func_json.result

@@ -1332,13 +1332,14 @@ drop table t1;
 #
 CREATE TABLE t1 (e INT, a VARCHAR(255), v VARCHAR(255));
 INSERT INTO t1 VALUES (0, 'a1', '1') , (0, 'a2', '2') , (1, 'b1', '3');
-EXPLAIN SELECT B.e, JSON_OBJECTAGG(B.a, B.v) FROM t1 A, t1 B GROUP BY B.e;
+EXPLAIN SELECT B.e, JSON_OBJECTAGG(B.a, B.v) FROM t1 A, t1 B GROUP BY B.e, B.a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	A	ALL	NULL	NULL	NULL	NULL	3	Using temporary; Using filesort
 1	SIMPLE	B	ALL	NULL	NULL	NULL	NULL	3	Using join buffer (flat, BNL join)
-SELECT B.e, JSON_OBJECTAGG(B.a, B.v) FROM t1 A, t1 B GROUP BY B.e;
+SELECT B.e, JSON_OBJECTAGG(B.a, B.v) FROM t1 A, t1 B GROUP BY B.e, B.a;
 e	JSON_OBJECTAGG(B.a, B.v)
-0	{"a1":"1", "a1":"1", "a1":"1", "a2":"2", "a2":"2", "a2":"2"}
+0	{"a1":"1", "a1":"1", "a1":"1"}
+0	{"a2":"2", "a2":"2", "a2":"2"}
 1	{"b1":"3", "b1":"3", "b1":"3"}
 DROP TABLE t1;
 #

mysql-test/main/func_json.test

@@ -833,8 +833,8 @@ drop table t1;
 CREATE TABLE t1 (e INT, a VARCHAR(255), v VARCHAR(255));
 INSERT INTO t1 VALUES (0, 'a1', '1') , (0, 'a2', '2') , (1, 'b1', '3');
 
-EXPLAIN SELECT B.e, JSON_OBJECTAGG(B.a, B.v) FROM t1 A, t1 B GROUP BY B.e;
-SELECT B.e, JSON_OBJECTAGG(B.a, B.v) FROM t1 A, t1 B GROUP BY B.e;
+EXPLAIN SELECT B.e, JSON_OBJECTAGG(B.a, B.v) FROM t1 A, t1 B GROUP BY B.e, B.a;
+SELECT B.e, JSON_OBJECTAGG(B.a, B.v) FROM t1 A, t1 B GROUP BY B.e, B.a;
 
 DROP TABLE t1;