Debugging tips

The following tips can help you debug your UDx before deploying it in a production environment.

Use a single node for initial debugging

You can attach to the Vertica process using a debugger such as gdb to debug your UDx code. Doing this in a multi-node environment, however, is very difficult. Therefore, consider setting up a single-node Vertica test environment to initially debug your UDx.

Use logging

Each UDx has an associated ServerInterface instance. The ServerInterface provides functions to write to the Vertica log and, in the C++ API only, a system table. See Logging for more information.