InsertQuery   (children 2)
 Identifier t
 SelectWithUnionQuery (children 1)
  ExpressionList (children 2)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Literal UInt64_1
    ExpressionList (children 1)
     Literal UInt64_2 (alias x)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Identifier x
    ExpressionList (children 1)
     Literal UInt64_2 (alias x)
