ClickHouse tips #2: Debugging ClickHouse on Visual Studio Code
How to configure Visual Studio Code to debug ClickHouse on it.
Alberto Romeu
Backend Developer
Feb 10, 2021
・
min read
It’s possible to debug ClickHouse on VSCode. These are the steps to do it:
- Build ClickHouse for debugging docs
- You can adapt the build with several flags, in my case I want to disable {% code-line %}jemalloc{% code-line-end %}:
- Doing {% code-line %}ninja clickhouse-server clickhouse-client{% code-line-end %} the whole process takes less than one hour.
And then to debug with Visual Studio Code:
- Install the C++ extension (and gdb from brew or apt)
- Create a new run config like this in {% code-line %}.vscode{% code-line-end %}:
Then you can just add breakpoints in any line in the editor and {% code-line %}RUN{% code-line-end %} from inside Visual Studio Code.
After doing any change in a cpp file, you can just recompile it, although there might be better ways to do this (let us know!). There’s a {% code-line %}compile_commands.json{% code-line-end %} file in the build folder with the commands and then call ninja to re-generate the clickhouse binary (it’ll just recompile the dependencies)
That’s it!
Alberto Romeu
Backend Developer
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