DescribeQuery (children 1)
 TableExpression (children 1)
  Subquery (children 1)
   SelectWithUnionQuery (children 1)
    ExpressionList (children 1)
     SelectQuery (children 1)
      ExpressionList (children 2)
       Function CAST (alias compound_value) (children 1)
        ExpressionList (children 2)
         Function tuple (children 1)
          ExpressionList (children 2)
           Literal UInt64_1
           Literal \'Value\'
         Literal \'Tuple (id UInt64, value String)\'
       Function arrayMap (children 1)
        ExpressionList (children 2)
         Function lambda (children 1)
          ExpressionList (children 2)
           Function tuple (children 1)
            ExpressionList (children 1)
             Identifier x
           QualifiedAsterisk (children 2)
            Identifier compound_value
            ColumnsTransformerList (children 2)
             ColumnsExceptTransformer (children 1)
              Identifier value
             ColumnsApplyTransformer
         Literal Array_[UInt64_1, UInt64_2, UInt64_3]