isClosed property
bool
get
isClosed
Reports on the latest known status of the connection: whether it was open or failed for some reason.
This is true
when this instance is first created and after it has been closed or encountered an unrecoverable error.
If a connection has already been opened and this value is now true, the connection cannot be reopened and a instance
must be created.
Implementation
bool get isClosed => _connectionState is _PostgreSQLConnectionStateClosed;