JQ()

Function description

The JQ() function is used to parse and transform JSON data based on jq expressions. Different from TRY_JQ(), TRY_JQ() supports returning null value when an error occurs, while JQ() directly throws an exception when encountering an error.

Grammar structure

select jq(jsonDoc, pathExpression);

Parameter explanation

Parameters	Description
jsonDoc	This is a column or expression containing JSON data.
pathExpression	Used to specify how to extract fields from JSON data

Example

mysql> select jq('{"foo": 128}', '.foo');
+------------------------+
| jq({"foo": 128}, .foo) |
+------------------------+
| 128                    |
+------------------------+
1 row in set (0.01 sec)

mysql> select jq(null, '.foo');
+----------------+
| jq(null, .foo) |
+----------------+
| NULL           |
+----------------+
1 row in set (0.00 sec)

mysql> select jq('{"id": "sample", "10": {"b": 42}}', '{(.id): .["10"].b}');
+-----------------------------------------------------------+
| jq({"id": "sample", "10": {"b": 42}}, {(.id): .["10"].b}) |
+-----------------------------------------------------------+
| {"sample":42}                                             |
+-----------------------------------------------------------+
1 row in set (0.00 sec)

mysql> select jq('[1, 2, 3]', '.foo & .bar');
ERROR 1105 (HY000): unexpected token "&"