custom probe query after enabling CAP_FORCE_CONNECTION_VERIFICATION
xsgao-github opened this issue · comments
About You:
Name: Song Gao
Company: Starburst Data
Your question:
We are using the Trino JDBC driver and enabled CAP_FORCE_CONNECTION_VERIFICATION in our connector per this doc:
| CAP_FORCE_CONNECTION_VERIFICATION | Set to ‘yes’ to verify connection status during initial connection by running a probe query. Available in Tableau 2022.2 and newer. |
|---|
Now I see Tableau always sends a query select version() during connection.
My questions are:
- Where is this probe query defined?
- Can I customize this query or even add a function to validate the returned resultset of the probe query?
The current design of CAP_FORCE_CONNECTION_VERIFICATION does not check the result of the probe query beyond that it does not fail. The probe query should always SELECT 1 for a connector built from the SDK. The probe query is also used to test lifetime and disconnect scenarios as well.
What is your desired use case with a potential customization?
My bad. The probe query is SELECT 1.
I would like to add some validation on Tableau connector. For example, if the server does not meet the minimum version of server requirement, error it out.
Ok, that makes sense. Please open an issue about your desire to enforce the minimum server version as a part of defining a connector. Anything like this would be decoupled from CAP_FORCE_CONNECTION_VERIFICATION.
I'll make sure it gets tagged as a potential enhancement. Thanks.
Feature request here #1210