InsertQuery   (children 3)
 Identifier test_00209
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 3)
    ExpressionList (children 1)
     Literal UInt64_1 (alias x)
    ExpressionList (children 1)
     Literal UInt64_1
    Set
 Set