json_valid

description

json_valid 函数返回0或1以表明是否为有效的JSON, 如果参数是NULL则返回NULL。

Syntax

JSONB json_valid(VARCHAR json_str)

example

1. 正常JSON字符串

MySQL > SELECT json_valid('{"k1":"v31","k2":300}');
+-------------------------------------+
| json_valid('{"k1":"v31","k2":300}') |
+-------------------------------------+
|                                   1 |
+-------------------------------------+
1 row in set (0.02 sec)

1. 无效的JSON字符串

MySQL > SELECT json_valid('invalid json');
+----------------------------+
| json_valid('invalid json') |
+----------------------------+
|                          0 |
+----------------------------+
1 row in set (0.02 sec)

1. NULL参数

MySQL > select json_valid(NULL);
+------------------+
| json_valid(NULL) |
+------------------+
|             NULL |
+------------------+
1 row in set (0.02 sec)

keywords

JSON, VALID, JSON_VALID