module Card::Query::Clause
#    attr_accessor :clause

    def safe_sql(txt)
      txt = txt.to_s
      txt.match( /[^\w\*\(\)\s\.\,]/ ) ? raise( "WQL contains disallowed characters: #{txt}" ) : txt
    end

    def quote(v)  ActiveRecord::Base.connection.quote(v)  end

    def match_prep(v)
      cxn ||= ActiveRecord::Base.connection
      [cxn, v]
    end


end