MariaDB

In MariaDB, JSON_VALUE() is a built-in function that returns a scalar value from a JSON document. More specifically, it returns the scalar specified by the path provided.

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In MariaDB, JSON_MERGE_PATCH() is a built-in function that merges two or more JSON documents and returns the result.

The JSON_MERGE_PATCH() function is an RFC 7396-compliant replacement for the JSON_MERGE() function, which has been deprecated.

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In MariaDB, JSON_MERGE_PRESERVE() is a built-in function that merges two or more JSON documents and returns the result.

JSON_MERGE_PRESERVE() is a synonym for JSON_MERGE(), which has been deprecated. To avoid future issues, you should use the JSON_MERGE_PATCH() function instead. The JSON_MERGE_PATCH() function is an RFC 7396-compliant replacement for JSON_MERGE().

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In MariaDB, JSON_MERGE() is a built-in function that merges two or more JSON documents and returns the result.

The JSON_MERGE() function has been deprecated, and to avoid future issues, you should use the JSON_MERGE_PATCH() function instead. The JSON_MERGE_PATCH() function is an RFC 7396-compliant replacement for JSON_MERGE().

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In MariaDB, JSON_EXTRACT() is a built-in function that extracts data from a JSON document, based on a given path or paths.

It can return single values and multiple values. If a single value is matched, a single value is returned. If multiple values are matched, then those values are returned in an array.

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In MariaDB, JSON_DETAILED() is a built-in function that takes a JSON document, and returns it in a more human-readable format.

This is sometimes referred to as prettifying the document. It’s similar to MySQL’s JSON_PRETTY() function.

For the opposite effect (i.e. to condense a JSON document down), use the JSON_COMPACT() function.

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In MariaDB, JSON_COMPACT() is a built-in function that removes all unnecessary spaces from a JSON document, so that it’s as short and compact as possible, and returns the result.

This can be handy for when you need to store JSON data in a database column, and you don’t want the JSON documents to use up any more space than is necessary.

For the opposite effect (i.e. to prettify a JSON document by adding indents and spreading it over multiple lines), use the JSON_DETAILED() function.

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In MariaDB, JSON_CONTAINS_PATH() is a built-in function that indicates whether a given JSON document contains data at the specified path or paths.

It returns 1 if the document does contain data at the specified path/s, 0 if it doesn’t, and NULL if any of the arguments are NULL.

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In MariaDB, JSON_CONTAINS() is a built-in function that allows you to find out whether a specified value is found in the given JSON document, or at a specific path within the document.

It returns 1 if it does contain the value, 0 if it doesn’t, and NULL if any of the arguments are NULL.

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