Array/Map value constructor is unparsed incorrectly in ClickHouse

Array/Map value constructor is unparsed incorrectly in ClickHouse,

currently select map('a','b') —> select MAP['a', 'b']   select array(1,2,3) —> select ARRAY[1,2,3]

that would cause to error as follow:

1. array[1,2,3] should to be array(1,2,3) and map['k1','v1','k2','v2'] should be map('k1','v1','k2','v2')

select array[1,2];
Code: 62. DB::Exception: Syntax error: failed at position 294 (end of query) (line 16, col 18): ;

select map['k1','v1','k2','v2'];
Code: 62. DB::Exception: Syntax error: failed at position 330 (end of query) (line 17, col 32): ;

2. case sensitive with map/array:
select map('a', 'b');
> {'a':'b'} ----- result is ok

select MAP('a', 'b');
Code: 46. DB::Exception: Received from localhost:9000. DB::Exception: Function with name `MAP` does not exist. In scope SELECT MAP('a', 'b').
 Maybe you meant: ['map','max']. (UNKNOWN_FUNCTION)
 
select array(1,2);
> [1,2] ----- result is ok

select ARRAY(1,2);
Code: 46. DB::Exception: Received from localhost:9000. DB::Exception: Function with name `ARRAY` does not exist. In scope SELECT ARRAY(1, 2). 
Maybe you meant: ['array']. (UNKNOWN_FUNCTION)

above results can refer to doc:
https://clickhouse.com/docs/sql-reference/data-types/array 
https://clickhouse.com/docs/sql-reference/data-types/map