JSON_VALID - MaxCompute - Alibaba Cloud Documentation Center

Checks whether a string is a valid JSON string.

Syntax

boolean json_valid(<string>)

Parameters

string: required. This parameter specifies the JSON string that you want to process.

Return value

The return value is true or false, which is of the BOOLEAN type.

Examples

Example 1: Check whether "abc" is a valid JSON string.
```
select json_valid('"abc"');
```
The following result is returned:
```
+------+
| _c0  |
+------+
| true |
+------+
```
Example 2: Check whether abc is a valid JSON string.
```
select json_valid('abc');
```
The following result is returned:
```
+------+
| _c0  |
+------+
| false |
+------+
```

Related functions

JSON_VALID is a complex type function. For more information about the functions that are used to process data of complex data types, such as ARRAY, MAP, STRUCT, and JSON, see Complex type functions.