In the file backend/executor/execMain.c there are the following hook types:
/* Hooks for plugins to get control in ExecutorStart/Run/Finish/End */ ExecutorStart_hook_type ExecutorStart_hook = NULL; ExecutorRun_hook_type ExecutorRun_hook = NULL; ExecutorFinish_hook_type ExecutorFinish_hook = NULL; ExecutorEnd_hook_type ExecutorEnd_hook = NULL; It is not clear to me what every hook, or better, event is associated to. I suspect they are: - start => prepare resources (e.g., allocate memory and stuff) - run - finish => execution terminated - end => free resources Am I wrong? Moreover, installing an hook is cluster-wide, right? Is there a way to limit an hook only for connections related to a single database (without taking into account FDW and friends)? Thanks, Luca
