DescribeQuery (children 1)
 TableExpression (children 1)
  Subquery (children 1)
   SelectWithUnionQuery (children 1)
    ExpressionList (children 1)
     SelectQuery (children 2)
      ExpressionList (children 1)
       Function lambda (alias test_lambda) (children 1)
        ExpressionList (children 2)
         Function tuple (children 1)
          ExpressionList (children 1)
           Identifier x
         Function plus (children 1)
          ExpressionList (children 2)
           Identifier x
           Literal UInt64_1
      ExpressionList (children 1)
       Function test_lambda (children 1)
        ExpressionList (children 1)
         Literal UInt64_1