pg_on_connection_loss

pg_on_connection_loss

Name

pg_on_connection_loss -- set or change a callback for unexpected connection loss

Synopsis

pg_on_connection_loss dbHandle callbackCommand

Inputs

dbHandle

Specifies a valid database handle.

callbackCommand

If present, provides the command string to execute when connection loss is detected.

Outputs

None

Description

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.

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