This function only tests data for compliance with JSON syntax, and does not create a JSON instance.
You can use this function to validate JSON data before loading it. This can save time when loading a large amount of JSON data by preventing the rollback of an entire transaction in the event of a JSON syntax error. The function also provides the necessary information to fix any syntax errors that may be present before you load the data.
You cannot use JSON_CHECK to validate JSON data that is stored in one of the binary formats. To validate BSON data, use the BSON_CHECK function.