sql-notify.html :
Higher-level mechanisms can be built by using tables in the database
to pass additional data (beyond a mere notification name) from notifier
to listener(s).
How ?
root2=> select * from pg_listener ;
relname | listenerpid | notification
---------+-------------+--------------
aaa | 723 | 0
(1 row)
grep -5 "typedef struct pgNotify" /usr/local/include/libpq-fe.h
typedef struct pgNotify
{
char *relname; /* notification condition name */
int be_pid; /* process ID of server process
*/
char *extra; /* notification parameter */
} PGnotify;
I need to insert "extra" data - uid, ...
PGnotify *notify;
notify->extra;
........
Thanks
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