SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function dictGet (children 1)
     ExpressionList (children 4)
      Literal \'test_dictionary\'
      Literal \'value\'
      Literal UInt64_0
      Literal \'DefaultValue\'
