ARRAY_POSITION

description

Returns a position/index of first occurrence of the value in the given array.

Syntax

ARRAY_POSITION(<arr>, <value>)

Parameters

Parameter	Description
<arr>	ARRAY array
<value>	Element to search for

Returns Value

The position of the value in the array (starting from 1). Special cases:

• 0, if the value does not exist in the array.
• NULL, if the array is NULL.

example

CREATE TABLE array_test (
                            id INT,
                            c_array ARRAY<INT>,
                            array_position INT
)
    duplicate key (id)
distributed by hash(id) buckets 1
properties(
  'replication_num' = '1'
);
INSERT INTO array_test (id, c_array, array_position) VALUES
                                                         (1, [1, 2, 3, 4, 5], 5),
                                                         (2, [6, 7, 8], 0),
                                                         (3, [], 0),
                                                         (4, NULL, NULL);
SELECT id,c_array,array_position(c_array, 5) FROM `array_test`;

+------+-----------------+------------------------------+
| id   | c_array         | array_position(`c_array`, 5) |
+------+-----------------+------------------------------+
|    1 | [1, 2, 3, 4, 5] |                            5 |
|    2 | [6, 7, 8]       |                            0 |
|    3 | []              |                            0 |
|    4 | NULL            |                         NULL |
+------+-----------------+------------------------------+

select array_position([1, null], null);

+--------------------------------------+
| array_position(ARRAY(1, NULL), NULL) |
+--------------------------------------+
|                                    2 |
+--------------------------------------+