array_product

array_product

SinceVersion 1.2.0

array_product

description

Syntax

T array_product(ARRAY<T> arr)

Get the product of all elements in an array (NULL values are skipped). When the array is empty or all elements in the array are NULL values, the function returns NULL.

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> set enable_vectorized_engine = true;    # enable vectorized engine
mysql> select k2, array_product(k2) from array_type_table;
+--------------+---------------------+
| k2           | array_product(`k2`) |
+--------------+---------------------+
| []           |                NULL |
| [NULL]       |                NULL |
| [1, 2, 3]    |                   6 |
| [1, NULL, 3] |                   3 |
+--------------+---------------------+
4 rows in set (0.01 sec)

keywords

ARRAY,PRODUCT,ARRAY_PRODUCT