|Subject||Re: [IBO] Can't close Query when FB is down|
> Call stack does not help in this situation. What I am not sure of isWhen my app is running and it detects, that the connection is lost
> exactly what you are trying to do.
(server is down or network failure, etc), then all datasets should be
closed. But this causes a lot of problems. Therefore I created this
simple test case, where I close only one query, when the FB-Server is down.
procedure TMainForm.ToolButton4Click(Sender: TObject);
if not MainDataModule.Connection.VerifyConnection then
When I close the query, I get an exception, that the connection is lost.
The first thing is, why do I get an exception, because I close the
query within a try-except-block, so I thought, this would prevent any
exception from being raised.
The second thing is, that's not clear to me, is that closing the query
causes IBO to reconnect. That's why I posted the call stack (you have to
read it from bottom to top). There you can see, that TIB_Statement
.SysClose calls TIB_Statement.GetColumnIsReadOnly, which calls
TIB_Statement.Prepare and then TIB_Connection.AllocateStmtHandle is called.