array_max

array_max

array_max

description

Syntax

T array_max(ARRAY<T> array1)

返回数组中最大的元素，数组中的NULL值会被跳过。空数组以及元素全为NULL值的数组，结果返回NULL值。

example

mysql> create table array_type_table(k1 INT, k2 Array<int>) duplicate key (k1)
    -> distributed by hash(k1) buckets 1 properties('replication_num' = '1');
mysql> insert into array_type_table values (0, []), (1, [NULL]), (2, [1, 2, 3]), (3, [1, NULL, 3]);
mysql> select k2, array_max(k2) from array_type_table;
+--------------+-----------------+
| k2           | array_max(`k2`) |
+--------------+-----------------+
| []           |            NULL |
| [NULL]       |            NULL |
| [1, 2, 3]    |               3 |
| [1, NULL, 3] |               3 |
+--------------+-----------------+
4 rows in set (0.02 sec)

keywords

ARRAY,MAX,ARRAY_MAX