Outputs more variables

[ng-galien]

Hi,I write a plugin for debugging with IntelliJ. I've modified the debugger to support variable output for records etc.
I basically use functions from the pl source tree to outputs these variables

• exec_eval_datum
• convert_value_to_string

Then the client is able to handle all structured data by casting the row outputs to the corresponding pg_class.
At the end the client build a JSON representation of the variable to gets its names.

https://github.com/ng-galien/idea-plpgdebugger

I hope we can integrate these enhancements to the official debugger.

[ng-galien]

I've made a Docker image to use the debugger with the modifications

https://github.com/ng-galien/idea-plpgdebugger/blob/221/docker/Dockerfile