JSON_CONTAINS

json_contains

description

Syntax

BOOLEAN json_contains(JSON json_str, JSON candidate) BOOLEAN json_contains(JSON json_str, JSON candidate, VARCHAR json_path) BOOLEAN json_contains(VARCHAR json_str, VARCHAR candidate, VARCHAR json_path)

通过返回 1 或 0 来指示给定的 candidate JSON 文档是否包含在 json_str JSON json_path 路径下的文档中

example

mysql> SET @j = '{"a": 1, "b": 2, "c": {"d": 4}}';
mysql> SET @j2 = '1';
mysql> SELECT JSON_CONTAINS(@j, @j2, '$.a');
+-------------------------------+
| JSON_CONTAINS(@j, @j2, '$.a') |
+-------------------------------+
|                             1 |
+-------------------------------+
mysql> SELECT JSON_CONTAINS(@j, @j2, '$.b');
+-------------------------------+
| JSON_CONTAINS(@j, @j2, '$.b') |
+-------------------------------+
|                             0 |
+-------------------------------+

mysql> SET @j2 = '{"d": 4}';
mysql> SELECT JSON_CONTAINS(@j, @j2, '$.a');
+-------------------------------+
| JSON_CONTAINS(@j, @j2, '$.a') |
+-------------------------------+
|                             0 |
+-------------------------------+
mysql> SELECT JSON_CONTAINS(@j, @j2, '$.c');
+-------------------------------+
| JSON_CONTAINS(@j, @j2, '$.c') |
+-------------------------------+
|                             1 |
+-------------------------------+

mysql> SELECT json_contains('[1, 2, {"x": 3}]', '1');
+----------------------------------------+
| json_contains('[1, 2, {"x": 3}]', '1') |
+----------------------------------------+
|                                      1 |
+----------------------------------------+
1 row in set (0.04 sec)

keywords

json,json_contains