Can i add the debug option after installation

febin jacob <febinjacob@gmail.com> writes:

I installed PostgreSQL without using "-enable-debug". Now I would like to
modify some files. Do I need to re-install PostgreSQL with "-enable-debug".
I would be grateful if you let me know whether I can change this
configuration without re-installing.

You need to reconfigure/rebuild/reinstall the executables, but you can
still use them with the same database.

regards, tom lane