ROW
The ROW()
function constructs a RECORD
object that may be used in an expression or assigned into a RECORD
type variable.
Example
The following function creates a record value using ROW()
:
DELIMITER // CREATE FUNCTION f() RETURNS INT AS DECLARE r RECORD(a int, b int); BEGIN r = ROW(1, 2); RETURN r.a + r.b; END // DELIMITER ;
Here’s an example use of this function:
SELECT f(); **** +------+ | f() | +------+ | 3 | +------+
Type Inference The data types of the fields of the new RECORD
object created are inferred from the context of the function or stored procedure. For example, if you assign the value of a new record created with ROW()
into a record variable, the types of the fields of the new record will be the same as the types of the fields of the record variable to which the new record value is assigned. In the example above, the types of the two fields of the record created by ROW are inferred to be int
based on the assignment to the variable r
.
Related Topics
RECORD: The
RECORD
data type is an encapsulated group of named fields.CREATE_ARRAY:
CREATE_ARRAY()
is used to create an array object.