array_product

SinceVersion 1.2.0

array_product

description

Syntax

T array_product(ARRAY<T> arr)

返回数组中所有元素的乘积，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

1. mysql> create table array_type_table(k1 INT, k2 Array<int>) duplicate key (k1)
2. -> distributed by hash(k1) buckets 1 properties('replication_num' = '1');
3. mysql> insert into array_type_table values (0, []), (1, [NULL]), (2, [1, 2, 3]), (3, [1, NULL, 3]);
4. mysql> set enable_vectorized_engine = true;    # enable vectorized engine
5. mysql> select k2, array_product(k2) from array_type_table;
6. +--------------+---------------------+
7. | k2           | array_product(`k2`) |
8. +--------------+---------------------+
9. | []           |                NULL |
10. | [NULL]       |                NULL |
11. | [1, 2, 3]    |                   6 |
12. | [1, NULL, 3] |                   3 |
13. +--------------+---------------------+
14. 4 rows in set (0.01 sec)

keywords

ARRAY,PRODUCT,ARRAY_PRODUCT