Specifies a character set name that is used as the default,
    identifier, and literal character sets for the session of the
    current connection. The value of runtime-options must be one of
    the character sets listed in the Supported_Characters_Sets HELP
    topic .

    You can supply a parameter marker from dynamic SQL, a host
    language variable from a precompiled SQL program, a parameter
    from an SQL module language module, or a string literal. The
    argument that you supply must be a character string that contains
    a connect expression that is interpreted at run time.