DescribeQuery (children 1)
 TableExpression (children 1)
  Subquery (children 1)
   SelectWithUnionQuery (children 1)
    ExpressionList (children 2)
     SelectQuery (children 1)
      ExpressionList (children 2)
       Literal UInt64_1
       Literal UInt64_1
     SelectQuery (children 1)
      ExpressionList (children 2)
       Literal UInt64_1
       Literal UInt64_2
