human
I wrote the below code

    if isinstance(statement, sqlalchemy.orm.Query):
        if (dialect is None):
            dialect = statement.session.get_bind(statement._mapper_zero_or_none()).dialect
        statement = statement.statement
    if (dialect is None):
        dialect = getattr(statement.bind, 'dialect', None)
    if (dialect is None):
        from sqlalchemy.dialects import mysql
        dialect = mysql.dialect()
    Compiler = type(statement._compiler(dialect))
    class LiteralCompiler(Compiler, ):
        visit_bindparam = Compiler.render_literal_bindparam
        def render_literal_value(self, value, type_):
            if isinstance(value, (Decimal, long)):
                return str(value)
            elif isinstance(value, datetime):
                return repr(str(value))
            else:
                value = super(LiteralCompiler, self).render_literal_value(value, type_)
                if isinstance(value, unicode):
                    return value.encode('UTF-8')
                else:
                    return value
    return LiteralCompiler(dialect, statement)

What's a good function header?

=====
Here's a good function header?
assistant
#Here's a good function header.

def literalquery(statement, dialect=None):