pg_on_connection_loss − set or change a callback for unexpected connection loss
pg_on_connection_loss conn [callbackCommand]
pg_on_connection_loss creates, changes, or cancels a request to execute a callback command if an unexpected loss of connection to the database occurs. With a callbackCommand parameter, the request is established, or the command string of an already existing request is replaced. With no callbackCommand parameter, a prior request is canceled.
The callback command string is executed from the Tcl idle loop. That is the normal idle state of an application written with Tk. In non-Tk Tcl shells, you can execute update or vwait to cause the idle loop to be entered.
conn |
The handle to watch for connection losses. |
callbackCommand
If present, provides the command string to execute when connection loss is detected.
None