EXPLODE_JSON_ARRAY_JSON

Description

The explode_json_array_json table function accepts a JSON array, where each element is of JSON object type, and expands each JSON object in the array into multiple rows, with each row containing one JSON object. It is used in conjunction with LATERAL VIEW.

Syntax

EXPLODE_JSON_ARRAY_JSON(<json>)
EXPLODE_JSON_ARRAY_JSON_OUTER(<json>)

Return Value

Parameter	Description
<json>	json type

Parameters

Expands the JSON array, creating a row for each element, returning a JSON object column.

Examples

CREATE TABLE json_array_example (
    id INT,
    json_array STRING
)DUPLICATE KEY(id)
DISTRIBUTED BY HASH(id) BUCKETS AUTO
PROPERTIES (
"replication_allocation" = "tag.location.default: 1");

INSERT INTO json_array_example (id, json_array) VALUES
(1, '[1, 2, 3, 4, 5]'),
(2, '[1.1, 2.2, 3.3, 4.4]'),
(3, '["apple", "banana", "cherry"]'),
(4, '[{"a": 1}, {"b": 2}, {"c": 3}]'),
(5, '[]'),
(6, 'NULL');

SELECT id, e1
FROM json_array_example
LATERAL VIEW EXPLODE_JSON_ARRAY_JSON(json_array) tmp1 AS e1
WHERE id = 4;

+------+---------+
| id   | e1      |
+------+---------+
|    4 | {"a":1} |
|    4 | {"b":2} |
|    4 | {"c":3} |
+------+---------+