Syntax options:

    DETERMINISTIC | NOT DETERMINISTIC

    These clauses are synonyms for the VARIANT and NOT VARIANT
    clauses for conformance to the SQL/PSM standard.

    The DETERMINISTIC clause indicates that the same inputs to the
    function will generate the same output. It is the same as the NOT
    VARIANT clause.

    The NOT DETERMINISTIC clause indicates that the output of the
    function does not depend on the inputs. It is the same as the
    VARIANT clause.