[英]Query on a list of json in Mysql 5.6
I am using mysql 5.6 and it will not be feasible for me to upgrade it to 5.7. 我正在使用mysql 5.6,将其升级到5.7将不可行。 I have a table which stores json as an attribute.
我有一个表,将json作为属性存储。 Attaching screenshot for reference.
随附屏幕截图以供参考。
Here, the column policy_status contains status and values of different policies as json for each user. 在此,policy_status列包含每个用户的不同策略的状态和值作为json。 How can I find the list of users, say, with appVersion' status as success and value = 1437. I got a few references online but as I am new to stored procedures I am not able to reach a solution.
我怎样才能找到用户列表,例如,appVersion的状态为成功,值=1437。我在网上获得了一些参考,但是由于我不熟悉存储过程,因此无法找到解决方案。 I will appreciate any help.
我将不胜感激。 Thanks in advance.
提前致谢。
It is not efficient at all but may can help you with ideas: 它根本没有效率,但是可以帮助您提出建议:
SELECT *
FROM data
WHERE
(LOCATE('"employmentType":["status":"success"]', policy_status) > 0
AND
LOCATE('"value": 1', policy_status) > 0);
Using the LOCATE
function you can see whether the field contains your desired appVersion
and value
strings. 使用
LOCATE
函数,您可以查看该字段是否包含所需的appVersion
和value
字符串。 See sqlfiddle demo here. 参见sqlfiddle演示 。
Where the simple test data : 其中简单的测试数据 :
CREATE TABLE data (
id INT UNSIGNED NOT NULL,
policy_status TEXT
);
INSERT INTO data (id, policy_status) VALUES
(1,'{"employmentType":["status":"success"], "value": 1}'),
(2,'{"employmentType":["status":"no"], "value": 1}'),
(3,'{"employmentType":["status":"no"], "value": 0}'),
(4,'{"employmentType":["status":"success"], "value": 0}'),
(5,'{"employmentType":["status":"no"], "value": 1}');
gives the result : 给出结果 :
{"employmentType":["status":"success"], "value": 1}
Where both strings are found. 找到两个字符串的地方。
UPDATE : 更新 :
Also if you can add FULLTEXT
index for your policy_status
column than you can use fulltext search in the WHERE
clause: 另外,如果您可以为
policy_status
列添加FULLTEXT
索引,则可以在WHERE
子句中使用全文本搜索:
...
WHERE
MATCH (policy_status) AGAINST ('+"employmentType:[status:success]" +"value: 1"' IN BOOLEAN MODE)
Note the +
and "
characters in AGAINST(...)
. They are special boolean full-text search operators. See here . 注意
AGAINST(...)
的+
和"
字符。它们是特殊的布尔型全文本搜索运算符。 请参见此处 。
A leading or trailing plus sign indicates that this word must be present in each row that is returned
前导或尾随加号表示此单词必须出现在返回的每一行中
and 和
A phrase that is enclosed within double quote (") characters matches only rows that contain the phrase literally, as it was typed. The full-text engine splits the phrase into words and performs a search in the FULLTEXT index for the words. Nonword characters need not be matched exactly.
包含在双引号(“)字符中的短语仅与按字面意义包含该短语的行匹配(如键入的那样)。全文引擎将短语拆分成单词,并在FULLTEXT索引中搜索这些单词。非单词字符不需要完全匹配。
If it is not an option in your case, you can use LIKE
for matching the substrings: 如果您不是这种情况,则可以使用
LIKE
来匹配子字符串:
...
WHERE
(policy_status LIKE '%"employmentType":["status":"success"]%'
AND
policy_status LIKE '%"value": 1%');
See sqlfiddle demo for both. 两者均参见sqlfiddle演示 。
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