diff --git a/mysql-test/main/func_json.result b/mysql-test/main/func_json.result
index b0a7cb4988c..1693d206741 100644
--- a/mysql-test/main/func_json.result
+++ b/mysql-test/main/func_json.result
@@ -1611,5 +1611,180 @@ SELECT json_object('a', coalesce(json_object('b', 'c')));
 json_object('a', coalesce(json_object('b', 'c')))
 {"a": {"b": "c"}}
 #
+# MDEV-30405 Check JSON data transfer
+#
+SELECT JSON_ARRAY('str', JSON_OBJECT('plugin', 'unix_socket'));
+JSON_ARRAY('str', JSON_OBJECT('plugin', 'unix_socket'))
+["str", {"plugin": "unix_socket"}]
+SELECT JSON_ARRAY('str', JSON_OBJECT('plugin', _LATIN1'unix_socket'));
+JSON_ARRAY('str', JSON_OBJECT('plugin', _LATIN1'unix_socket'))
+["str", {"plugin": "unix_socket"}]
+SELECT JSON_ARRAY('str', JSON_OBJECT(_LATIN1 'plugin', _LATIN1'unix_socket'));
+JSON_ARRAY('str', JSON_OBJECT(_LATIN1 'plugin', _LATIN1'unix_socket'))
+["str", {"plugin": "unix_socket"}]
+SELECT JSON_ARRAYAGG(JSON_OBJECT('plugin', 'unix_socket'));
+JSON_ARRAYAGG(JSON_OBJECT('plugin', 'unix_socket'))
+[{"plugin": "unix_socket"}]
+SELECT JSON_ARRAYAGG(JSON_OBJECT(_LATIN1 'plugin', _LATIN1'unix_socket'));
+JSON_ARRAYAGG(JSON_OBJECT(_LATIN1 'plugin', _LATIN1'unix_socket'))
+[{"plugin": "unix_socket"}]
+SELECT JSON_MERGE(JSON_OBJECT('number', 'one'),JSON_OBJECT('number', 'two'));
+JSON_MERGE(JSON_OBJECT('number', 'one'),JSON_OBJECT('number', 'two'))
+{"number": ["one", "two"]}
+SELECT JSON_MERGE(JSON_OBJECT(_LATIN1 'number', _LATIN1'one'),JSON_OBJECT(_LATIN1 'number', _LATIN1'two'));
+JSON_MERGE(JSON_OBJECT(_LATIN1 'number', _LATIN1'one'),JSON_OBJECT(_LATIN1 'number', _LATIN1'two'))
+{"number": ["one", "two"]}
+SELECT GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT('number', 'one'),JSON_OBJECT('number', 'two')));
+GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT('number', 'one'),JSON_OBJECT('number', 'two')))
+{"number": "one"}:{"number": "two"}
+SELECT GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT(_LATIN1 'number', _LATIN1'one'),JSON_OBJECT(_LATIN1 'number', _LATIN1'two')));
+GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT(_LATIN1 'number', _LATIN1'one'),JSON_OBJECT(_LATIN1 'number', _LATIN1'two')))
+{"number": "one"}:{"number": "two"}
+CREATE TABLE t1 (a varchar(10), b varchar(10));
+INSERT INTO t1 VALUES ("number","one"), ("number","two"), (_LATIN1'number',_LATIN1'three'),(_LATIN1'number',"four");
+CREATE VIEW v1 AS SELECT * FROM t1;
+SELECT JSON_OBJECTAGG(a,b) FROM t1;
+JSON_OBJECTAGG(a,b)
+{"number":"one", "number":"two", "number":"three", "number":"four"}
+SELECT JSON_OBJECTAGG(a,b) FROM v1;
+JSON_OBJECTAGG(a,b)
+{"number":"one", "number":"two", "number":"three", "number":"four"}
+SELECT JSON_OBJECTAGG(v1.a,t1.b) FROM v1,t1;
+JSON_OBJECTAGG(v1.a,t1.b)
+{"number":"one", "number":"one", "number":"one", "number":"one", "number":"two", "number":"two", "number":"two", "number":"two", "number":"three", "number":"three", "number":"three", "number":"three", "number":"four", "number":"four", "number":"four", "number":"four"}
+SELECT JSON_ARRAYAGG(b) from t1;
+JSON_ARRAYAGG(b)
+["one","two","three","four"]
+SELECT JSON_ARRAYAGG(b) from v1;
+JSON_ARRAYAGG(b)
+["one","two","three","four"]
+SELECT JSON_OBJECT(a, b) from t1;
+JSON_OBJECT(a, b)
+{"number": "one"}
+{"number": "two"}
+{"number": "three"}
+{"number": "four"}
+SELECT JSON_OBJECT(a, b) from v1;
+JSON_OBJECT(a, b)
+{"number": "one"}
+{"number": "two"}
+{"number": "three"}
+{"number": "four"}
+SELECT JSON_OBJECT(v1.a, t1.b) from v1,t1;
+JSON_OBJECT(v1.a, t1.b)
+{"number": "one"}
+{"number": "one"}
+{"number": "one"}
+{"number": "one"}
+{"number": "two"}
+{"number": "two"}
+{"number": "two"}
+{"number": "two"}
+{"number": "three"}
+{"number": "three"}
+{"number": "three"}
+{"number": "three"}
+{"number": "four"}
+{"number": "four"}
+{"number": "four"}
+{"number": "four"}
+SELECT JSON_ARRAYAGG(JSON_OBJECT(a, b)) from t1;
+JSON_ARRAYAGG(JSON_OBJECT(a, b))
+[{"number": "one"},{"number": "two"},{"number": "three"},{"number": "four"}]
+SELECT JSON_ARRAYAGG(JSON_OBJECT(a, b)) from v1;
+JSON_ARRAYAGG(JSON_OBJECT(a, b))
+[{"number": "one"},{"number": "two"},{"number": "three"},{"number": "four"}]
+SELECT JSON_ARRAYAGG(JSON_OBJECT(v1.a, t1.b)) from v1,t1;
+JSON_ARRAYAGG(JSON_OBJECT(v1.a, t1.b))
+[{"number": "one"},{"number": "one"},{"number": "one"},{"number": "one"},{"number": "two"},{"number": "two"},{"number": "two"},{"number": "two"},{"number": "three"},{"number": "three"},{"number": "three"},{"number": "three"},{"number": "four"},{"number": "four"},{"number": "four"},{"number": "four"}]
+DROP VIEW v1;
+DROP TABLE t1;
+CREATE TABLE t1 (a json, b json);
+INSERT INTO t1 VALUES ('{"number":"one"}','{"number":"two"}'), ('{"number":"one"}','{"number":"two"}');
+CREATE VIEW v1 AS SELECT * FROM t1;
+SELECT GROUP_CONCAT(CONCAT_WS(":",a,b) ORDER BY a DESC LIMIT 1) FROM t1;
+GROUP_CONCAT(CONCAT_WS(":",a,b) ORDER BY a DESC LIMIT 1)
+{"number":"one"}:{"number":"two"}
+SELECT GROUP_CONCAT(CONCAT_WS(":",a,b) ORDER BY a DESC LIMIT 1) FROM v1;
+GROUP_CONCAT(CONCAT_WS(":",a,b) ORDER BY a DESC LIMIT 1)
+{"number":"one"}:{"number":"two"}
+SELECT GROUP_CONCAT(CONCAT_WS(":",v1.a,t1.b) ORDER BY v1.a DESC LIMIT 1) FROM v1,t1;
+GROUP_CONCAT(CONCAT_WS(":",v1.a,t1.b) ORDER BY v1.a DESC LIMIT 1)
+{"number":"one"}:{"number":"two"}
+SELECT JSON_ARRAYAGG(a) from t1;
+JSON_ARRAYAGG(a)
+[{"number":"one"},{"number":"one"}]
+SELECT JSON_ARRAYAGG(a) from v1;
+JSON_ARRAYAGG(a)
+[{"number":"one"},{"number":"one"}]
+SELECT JSON_MERGE(a , b) from t1;
+JSON_MERGE(a , b)
+{"number": ["one", "two"]}
+{"number": ["one", "two"]}
+SELECT JSON_MERGE(a , b) from v1;
+JSON_MERGE(a , b)
+{"number": ["one", "two"]}
+{"number": ["one", "two"]}
+SELECT JSON_MERGE(v1.a , t1.b) from v1,t1;
+JSON_MERGE(v1.a , t1.b)
+{"number": ["one", "two"]}
+{"number": ["one", "two"]}
+{"number": ["one", "two"]}
+{"number": ["one", "two"]}
+DROP VIEW v1;
+DROP TABLE t1;
+CREATE VIEW v1 AS SELECT JSON_OBJECT(_LATIN1 'plugin', _LATIN1'unix_socket') as v1_json;
+SELECT v1_json FROM v1;
+v1_json
+{"plugin": "unix_socket"}
+SELECT JSON_ARRAYAGG(v1_json) FROM v1;
+JSON_ARRAYAGG(v1_json)
+["{"plugin": "unix_socket"}"]
+SELECT JSON_MERGE(v1_json,v1_json) FROM v1;
+JSON_MERGE(v1_json,v1_json)
+{"plugin": ["unix_socket", "unix_socket"]}
+SELECT JSON_MERGE(JSON_OBJECT(_LATIN1 'number', _LATIN1'two'),JSON_OBJECT('number', 'one'),v1_json,v1_json) FROM v1;
+JSON_MERGE(JSON_OBJECT(_LATIN1 'number', _LATIN1'two'),JSON_OBJECT('number', 'one'),v1_json,v1_json)
+{"number": ["two", "one"], "plugin": ["unix_socket", "unix_socket"]}
+SELECT JSON_MERGE(JSON_OBJECT('plugin', 'one'),v1_json) FROM v1;
+JSON_MERGE(JSON_OBJECT('plugin', 'one'),v1_json)
+{"plugin": ["one", "unix_socket"]}
+SELECT JSON_MERGE(JSON_OBJECT(_LATIN1 'plugin', _LATIN1'two'),v1_json) FROM v1;
+JSON_MERGE(JSON_OBJECT(_LATIN1 'plugin', _LATIN1'two'),v1_json)
+{"plugin": ["two", "unix_socket"]}
+SELECT GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT(_LATIN1 'number', _LATIN1'one'),v1_json)) FROM v1;
+GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT(_LATIN1 'number', _LATIN1'one'),v1_json))
+{"number": "one"}:{"plugin": "unix_socket"}
+SELECT GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT('number', 'one'),v1_json)) FROM v1;
+GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT('number', 'one'),v1_json))
+{"number": "one"}:{"plugin": "unix_socket"}
+DROP VIEW v1;
+CREATE VIEW v1 AS SELECT JSON_OBJECT('plugin','unix_socket') as v1_json;
+SELECT v1_json FROM v1;
+v1_json
+{"plugin": "unix_socket"}
+SELECT JSON_ARRAYAGG(v1_json) FROM v1;
+JSON_ARRAYAGG(v1_json)
+["{"plugin": "unix_socket"}"]
+SELECT JSON_MERGE(v1_json,v1_json) FROM v1;
+JSON_MERGE(v1_json,v1_json)
+{"plugin": ["unix_socket", "unix_socket"]}
+SELECT JSON_MERGE(JSON_OBJECT(_LATIN1 'number', _LATIN1'two'),JSON_OBJECT('number', 'one'),v1_json,v1_json) FROM v1;
+JSON_MERGE(JSON_OBJECT(_LATIN1 'number', _LATIN1'two'),JSON_OBJECT('number', 'one'),v1_json,v1_json)
+{"number": ["two", "one"], "plugin": ["unix_socket", "unix_socket"]}
+SELECT JSON_MERGE(JSON_OBJECT('plugin', 'one'),v1_json) FROM v1;
+JSON_MERGE(JSON_OBJECT('plugin', 'one'),v1_json)
+{"plugin": ["one", "unix_socket"]}
+SELECT JSON_MERGE(JSON_OBJECT(_LATIN1 'plugin', _LATIN1'two'),v1_json) FROM v1;
+JSON_MERGE(JSON_OBJECT(_LATIN1 'plugin', _LATIN1'two'),v1_json)
+{"plugin": ["two", "unix_socket"]}
+SELECT GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT(_LATIN1 'number', _LATIN1'one'),v1_json)) FROM v1;
+GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT(_LATIN1 'number', _LATIN1'one'),v1_json))
+{"number": "one"}:{"plugin": "unix_socket"}
+SELECT GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT('number', 'one'),v1_json)) FROM v1;
+GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT('number', 'one'),v1_json))
+{"number": "one"}:{"plugin": "unix_socket"}
+DROP VIEW v1;
+#
 # End of 10.5 tests
 #
diff --git a/mysql-test/main/func_json.test b/mysql-test/main/func_json.test
index 7e7b83c720d..7e791e01637 100644
--- a/mysql-test/main/func_json.test
+++ b/mysql-test/main/func_json.test
@@ -1054,6 +1054,94 @@ DROP TABLE t2;
 SELECT json_object('a', if(1, json_object('b', 'c'), json_object('e', 'f')));
 SELECT json_object('a', coalesce(json_object('b', 'c')));
 
+--echo #
+--echo # MDEV-30405 Check JSON data transfer
+--echo #
+
+SELECT JSON_ARRAY('str', JSON_OBJECT('plugin', 'unix_socket'));
+SELECT JSON_ARRAY('str', JSON_OBJECT('plugin', _LATIN1'unix_socket'));
+SELECT JSON_ARRAY('str', JSON_OBJECT(_LATIN1 'plugin', _LATIN1'unix_socket'));
+
+SELECT JSON_ARRAYAGG(JSON_OBJECT('plugin', 'unix_socket'));
+SELECT JSON_ARRAYAGG(JSON_OBJECT(_LATIN1 'plugin', _LATIN1'unix_socket'));
+
+SELECT JSON_MERGE(JSON_OBJECT('number', 'one'),JSON_OBJECT('number', 'two'));
+SELECT JSON_MERGE(JSON_OBJECT(_LATIN1 'number', _LATIN1'one'),JSON_OBJECT(_LATIN1 'number', _LATIN1'two'));
+
+SELECT GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT('number', 'one'),JSON_OBJECT('number', 'two')));
+SELECT GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT(_LATIN1 'number', _LATIN1'one'),JSON_OBJECT(_LATIN1 'number', _LATIN1'two')));
+
+CREATE TABLE t1 (a varchar(10), b varchar(10));
+INSERT INTO t1 VALUES ("number","one"), ("number","two"), (_LATIN1'number',_LATIN1'three'),(_LATIN1'number',"four");
+CREATE VIEW v1 AS SELECT * FROM t1;
+
+SELECT JSON_OBJECTAGG(a,b) FROM t1;
+SELECT JSON_OBJECTAGG(a,b) FROM v1;
+SELECT JSON_OBJECTAGG(v1.a,t1.b) FROM v1,t1;
+
+SELECT JSON_ARRAYAGG(b) from t1;
+SELECT JSON_ARRAYAGG(b) from v1;
+
+SELECT JSON_OBJECT(a, b) from t1;
+SELECT JSON_OBJECT(a, b) from v1;
+SELECT JSON_OBJECT(v1.a, t1.b) from v1,t1;
+
+SELECT JSON_ARRAYAGG(JSON_OBJECT(a, b)) from t1;
+SELECT JSON_ARRAYAGG(JSON_OBJECT(a, b)) from v1;
+SELECT JSON_ARRAYAGG(JSON_OBJECT(v1.a, t1.b)) from v1,t1;
+
+DROP VIEW v1;
+DROP TABLE t1;
+
+CREATE TABLE t1 (a json, b json);
+INSERT INTO t1 VALUES ('{"number":"one"}','{"number":"two"}'), ('{"number":"one"}','{"number":"two"}');
+CREATE VIEW v1 AS SELECT * FROM t1;
+
+SELECT GROUP_CONCAT(CONCAT_WS(":",a,b) ORDER BY a DESC LIMIT 1) FROM t1;
+SELECT GROUP_CONCAT(CONCAT_WS(":",a,b) ORDER BY a DESC LIMIT 1) FROM v1;
+SELECT GROUP_CONCAT(CONCAT_WS(":",v1.a,t1.b) ORDER BY v1.a DESC LIMIT 1) FROM v1,t1;
+
+SELECT JSON_ARRAYAGG(a) from t1;
+SELECT JSON_ARRAYAGG(a) from v1;
+
+SELECT JSON_MERGE(a , b) from t1;
+SELECT JSON_MERGE(a , b) from v1;
+SELECT JSON_MERGE(v1.a , t1.b) from v1,t1;
+
+DROP VIEW v1;
+DROP TABLE t1;
+
+CREATE VIEW v1 AS SELECT JSON_OBJECT(_LATIN1 'plugin', _LATIN1'unix_socket') as v1_json;
+
+SELECT v1_json FROM v1;
+
+SELECT JSON_ARRAYAGG(v1_json) FROM v1;
+
+SELECT JSON_MERGE(v1_json,v1_json) FROM v1;
+SELECT JSON_MERGE(JSON_OBJECT(_LATIN1 'number', _LATIN1'two'),JSON_OBJECT('number', 'one'),v1_json,v1_json) FROM v1;
+SELECT JSON_MERGE(JSON_OBJECT('plugin', 'one'),v1_json) FROM v1;
+SELECT JSON_MERGE(JSON_OBJECT(_LATIN1 'plugin', _LATIN1'two'),v1_json) FROM v1;
+
+SELECT GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT(_LATIN1 'number', _LATIN1'one'),v1_json)) FROM v1;
+SELECT GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT('number', 'one'),v1_json)) FROM v1;
+
+DROP VIEW v1;
+
+CREATE VIEW v1 AS SELECT JSON_OBJECT('plugin','unix_socket') as v1_json;
+
+SELECT v1_json FROM v1;
+
+SELECT JSON_ARRAYAGG(v1_json) FROM v1;
+
+SELECT JSON_MERGE(v1_json,v1_json) FROM v1;
+SELECT JSON_MERGE(JSON_OBJECT(_LATIN1 'number', _LATIN1'two'),JSON_OBJECT('number', 'one'),v1_json,v1_json) FROM v1;
+SELECT JSON_MERGE(JSON_OBJECT('plugin', 'one'),v1_json) FROM v1;
+SELECT JSON_MERGE(JSON_OBJECT(_LATIN1 'plugin', _LATIN1'two'),v1_json) FROM v1;
+
+SELECT GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT(_LATIN1 'number', _LATIN1'one'),v1_json)) FROM v1;
+SELECT GROUP_CONCAT(CONCAT_WS(":",JSON_OBJECT('number', 'one'),v1_json)) FROM v1;
+
+DROP VIEW v1;
 
 --echo #
 --echo # End of 10.5 tests