TRY_JQ()

Function Description

The TRY_JQ() function is used to parse and convert JSON data based on jq expressions. Unlike JQ(), TRY_JQ() supports returning null values ​​when an error occurs, while JQ() directly throws an exception when an error occurs.

Grammar Structure

select try_jq(jsonDoc, pathExpression);

Parameter definition

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

Example

mysql> select try_jq('{"foo": 128}', '.foo');
+----------------------------------+
| try_jq({"foo": 128}, .foo) |
+----------------------------------+
| 128 |
+----------------------------------+
1 row in set (0.00 sec)

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

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

mysql> select try_jq('[1, 2, 3]', '.foo & .bar');
+------------------------------------+
|try_jq([1, 2, 3], .foo & .bar) |
+------------------------------------+
| NULL |
+------------------------------------+
1 row in set (0.00 sec)