Just checked and this is written in the initial setup:

-- # write your SQL statement here: you are given a table 'ispalindrome' with column 'str', return a table with column 'str' and your result in a column named 'res'.

Do you think this should be made more clear?

The description is shared across all languages. SQL setup is mostly like this that you have to write a SELECT query.
Normally this is stated in the solution setup. If it is not then indeed this should be added.