SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function dictGetOrDefault (alias value_first) (children 1)
     ExpressionList (children 4)
      Literal \'01754_dictionary_db.direct_dictionary_complex_key_complex_attributes\'
      Literal \'value_first\'
      Function tuple (children 1)
       ExpressionList (children 2)
        Identifier number
        Function concat (children 1)
         ExpressionList (children 2)
          Literal \'id_key_\'
          Function toString (children 1)
           ExpressionList (children 1)
            Identifier number
      Function toString (children 1)
       ExpressionList (children 1)
        Literal \'default\'
    Function dictGetOrDefault (alias value_second) (children 1)
     ExpressionList (children 4)
      Literal \'01754_dictionary_db.direct_dictionary_complex_key_complex_attributes\'
      Literal \'value_second\'
      Function tuple (children 1)
       ExpressionList (children 2)
        Identifier number
        Function concat (children 1)
         ExpressionList (children 2)
          Literal \'id_key_\'
          Function toString (children 1)
           ExpressionList (children 1)
            Identifier number
      Function toString (children 1)
       ExpressionList (children 1)
        Literal \'default\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.numbers
   Literal UInt64_3
