where table privileges are stored

Hello,

 

I need to check in a GUI if a user has certain privileges on the table he is trying to modify – insert/update/delete.

Something I could query system catalogs about:

  Select  …  from … where table_name  = ‘MYTABLE’;

 

Does Postgres store user privileges on tables in format similar to the one below, I mean the info below to be stored as a text field somewhere?

   grant delete on MYTABLE  to myuser

   grant insert on  MYTABLE  to myuser

 

Thanks,

Nina