DescribeQuery (children 1)
 TableExpression (children 1)
  Subquery (children 1)
   SelectWithUnionQuery (children 1)
    ExpressionList (children 1)
     SelectQuery (children 1)
      ExpressionList (children 1)
       Function 02096_test_function (alias a) (children 1)
        ExpressionList (children 1)
         Literal UInt64_1
