CreateQuery union (children 2)
 Identifier union
 SelectWithUnionQuery (children 1)
  ExpressionList (children 2)
   SelectQuery (children 1)
    ExpressionList (children 1)
     Literal UInt64_1 (alias test)
   SelectQuery (children 1)
    ExpressionList (children 1)
     Literal UInt64_2