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