SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 4)
    Literal UInt64_1 (alias x)
    Literal Array_[UInt64_2, UInt64_3] (alias y)
    Literal \'Hello\' (alias z)
    Literal NULL (alias a)
 Identifier ODBCDriver2
