![]() ![]() +-+Īlso see JSON_INSERT() for inserting values without replacing existing values, and JSON_REPLACE() for replacing only existing values. Here’s an example to demonstrate how to insert a value using this function. JSONSET () Syntax Here is the syntax of the MySQL JSONSET () function: JSONSET(json, path, value, path2, value2. It is equivalent to a combination of JSONINSERT () and JSONREPLACE (). The document produced by evaluating one pair becomes the new value against which the next pair is evaluated.Īn error occurs if the first argument is not a valid JSON document, or if any path argument is not a valid path expression or contains a * or ** wildcard. In MySQL, the JSONSET () function inserts or updates data in a JSON document and return a new JSON document. The path-value pairs are evaluated left to right. path is the path of the element for which to insert data or update the value at.The syntax goes like this: JSON_SET(json_doc, path, val. You can provide multiple path/value pairs if you need to update multiple values. You provide the JSON document as the first argument, followed by the path to insert into, followed by the value to insert. You provide the JSON document as the first argument, followed by the path to insert into, followed by the value to insert. In MySQL, the JSONSET () function inserts or updates values in a JSON document and returns the result. ![]() It increases the complexity of any code you write to do it, and the developer who needs to take over maintenance of your code after you have moved on to another project will curse your name.In MySQL, the JSON_SET() function inserts or updates values in a JSON document and returns the result. Storing data in a JSON document when you eventually want to use SQL expressions to search or update individual fields within the JSON document is a costly mistake. Now compare how difficult that is to: UPDATE content SET status = 1 WHERE name = 'Jack' Using this in an UPDATE looks like this: mysql> update example set content = json_set(content, concat(json_unquote(json_search(json_extract(content, '$.name'), 'one', 'Jack')), '.status'), '1') Now use it in a JSON_SET() call: mysql> select json_pretty(Ĭoncat(json_unquote(json_search(json_extract(content, '$.name'), 'one', 'Jack')), '.status'), status and you can get the full path to the field you want to update: mysql> select concat(json_unquote(json_search(json_extract(content, '$.name'), 'one', 'Jack')), '.status') as path from example Then you can search that array to get the array position: mysql> select json_search(json_extract(content, '$.name'), 'one', 'Jack') as root from example How to update JSON data type column in MySQL 5.7.10 - Stack Overflow How to update JSON data type column in MySQL 5.7.10 Ask Question Asked 7 years, 5 months ago Modified 2 years, 11 months ago Viewed 136k times 100 I have started using MySQL 5.7.10 recently and I am liking the native JSON Data type a lot. Here's a trick: You can extract the name field, and that turns into an array of those values: mysql> select json_extract(content, '$.name') as a from example Here is my sql code update posts set like if (jsoncontains (like,2,''), jsonremove (like,replace (jsonsearch (like,'one',2),''','')), jsonarrayappend (like,'',2) ) where id 3 My table After this sql code id 3 should be like id 2. mysql> select j.* from example cross join json_table(content, '$' columns( 1 I want to update my raw with if-else condition. And that doesn't tell you the path to the element, it only allows you to return a specific row out of the array. To search for a key/value pair, you need to use JSON_TABLE() and that requires you upgrade to MySQL 8.0. mysql> select json_unquote(json_search(content, 'one', 'Jack')) as path from example If "Jack" occurs in some other field, that would also be found. You can get the path to a JSON element with JSON_SEARCH(), but you can only search by value, not by a key/value pair. The solution in that case depends on you knowing which array element your pseudo-record exists in. The question like yours has come up before on Stack Overflow, for example JSON update single value in MySQL table. WHERE somecolumnsomevalue Notice the WHERE clause in the UPDATE syntax: The WHERE clause specifies which record or records that should be updated. mysql> select json_pretty(json_replace(content, '$.status', '1')) as j The UPDATE statement is used to update existing records in a table: UPDATE tablename SET column1value, column2value2. So in this case, we can see that the array element is $ but if you didn't know that, you couldn't use this solution. You can use JSON_REPLACE() or JSON_SET(), but both require that you know the path to the field you want to change. This is very awkward, nearly impossible with MySQL's JSON functions. ![]()
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