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
- 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)- 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)- NULL参数
MySQL > select json_valid(NULL);
+------------------+
| json_valid(NULL) |
+------------------+
| NULL |
+------------------+
1 row in set (0.02 sec)keywords
JSON, VALID, JSON_VALID