How to build a database that adds additional code based on lgtm's database

[diggid4ever]

Hello! Sorry to take up your time, I have a problem to discuss the appropriate solution.

I downloaded a project database from lgtm for security research.I want to use this project as a dependency to write some additional test code, and then create a new database with the additional test code and the project source code.

I have only one solution at present：Merge test code and project code，Then execute the command
codeql database create log4j2-custom -l java --overwrite

This can be created successfully after multiple compilation failures with maven. But this is a complete recreation of a database, without using the compiled database on lgtm. Is there any easier way to add new code to an existing database without recompiling the whole project?

[aibaars]

This can be created successfully after multiple compilation failures with maven. But this is a complete recreation of a database, without using the compiled database on lgtm. Is there any easier way to add new code to an existing database without recompiling the whole project?

There is no easier way, unfortunately. A CodeQL database is read-only after it is created.