SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function joinGet (children 1)
     ExpressionList (children 3)
      Literal \'kv\'
      Literal \'v\'
      Function toUInt32 (children 1)
       ExpressionList (children 1)
        Literal UInt64_1