SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function toNullable (alias user_id) (children 1)
     ExpressionList (children 1)
      Function toInt32 (children 1)
       ExpressionList (children 1)
        Literal UInt64_2
   Function notEquals (children 1)
    ExpressionList (children 2)
     Function joinGet (children 1)
      ExpressionList (children 3)
       Identifier test_joinGet
       Literal \'name\'
       Identifier user_id
     Literal \'\'