Comments are annotations embedded in the GraphQL query that serve to explain and document a specific statement making the query easier to understand and maintain.

You can add comments to the GraphQL table function by using the # symbol. Anything that follows the # is considered as a comment and would not be executed.

SELECT JSON_SERIALIZE(data PRETTY) AS data FROM GRAPHQL('
    race (limit: 2) {
        id: race_id
        name
        podium # this field is a JSON object having details of Top 3
        date: race_date
    }
');

The text this field is a JSON object having details of Top 3 considered a comment since it is preceded by a # symbol. Adding the comment would not modify or impact the results generated by the query.