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.
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.
In MariaDB, JSON_OBJECTAGG() is a built-in function that returns a JSON object containing key-value pairs, based on its two arguments.
In MariaDB, JSON_ARRAY_APPEND() is a built-in function that appends values to the end of the specified array/s within a JSON document, and returns the result.
In MariaDB, JSON_OBJECT() is a built-in function that returns a JSON object containing the key/value pairs provided as arguments.
In MariaDB, JSON_ARRAYAGG() is a built-in function that returns a JSON array containing an element for each value in a given set of JSON or SQL values.
The function acts on a column or an expression that evaluates to a single value. It enables you to aggregate a result set as a single JSON array. Each row of the result set ends up as a single element in the array.
In MariaDB, JSON_ARRAY() is a built-in function that returns a JSON array containing the specified values, provided as arguments.
In MariaDB, CURRENT_ROLE() is a built-in function that returns the current role name. The current role determines your access privileges.
The output of SELECT CURRENT_ROLE is equivalent to the contents of the information_schema.ENABLED_ROLES table.
In MariaDB, ROW_COUNT() is a built-in function that returns the number of rows updated, inserted or deleted by the preceding statement.
The value returned by ROW_COUNT() is the same as the row count that the mysql client displays and the value from the mysql_affected_rows() C API function.
In MariaDB, LAST_INSERT_ID() is a built-in function that returns the first automatically generated value successfully inserted for an AUTO_INCREMENT column as a result of the most recently executed INSERT statement.
It can also be called with an argument, in which case, it returns the value of the expression and the next call to LAST_INSERT_ID() will return the same value.