Mac OSX FMX TMSQuery AV and crash reading image from broken connection
Posted: Tue 30 Jan 2018 16:59
Hi,
Using my FMX-App I am fetching records from a remote SQL-Server to save them in a local database on my Mac. This might take several minutes ...
Situation 1, "select ID, Match, Image from Pictures':
When the connection to the SQL-Server breaks while fetching records an AV occurs on the Mac in my Firemonkey App and also it closes unexpectedly (see my code for comments) and message from PAServer: "Exception EInvalidOp in Modul Project10 at 0003B8AF, Invalid Floatingpoint-operation.
Situation 2, "select ID, Match from Pictures":
When the connection to the SQL-Server breaks while fetching records and CPU% goes to 99.7% on the Mac in my Firemonkey App and it hangs for ever.
MAC: OSX 10.13.2
Delphi: TOKYO 10.2.2
SDAC: 8.04
Using my FMX-App I am fetching records from a remote SQL-Server to save them in a local database on my Mac. This might take several minutes ...
Situation 1, "select ID, Match, Image from Pictures':
When the connection to the SQL-Server breaks while fetching records an AV occurs on the Mac in my Firemonkey App and also it closes unexpectedly (see my code for comments) and message from PAServer: "Exception EInvalidOp in Modul Project10 at 0003B8AF, Invalid Floatingpoint-operation.
Situation 2, "select ID, Match from Pictures":
When the connection to the SQL-Server breaks while fetching records and CPU% goes to 99.7% on the Mac in my Firemonkey App and it hangs for ever.
MAC: OSX 10.13.2
Delphi: TOKYO 10.2.2
SDAC: 8.04
Code: Select all
procedure TForm14.ButtonRunClick(Sender: TObject);
var
MSConnection : TMSConnection;
MSQuery : TMSQuery;
i : Integer;
begin
MSConnection := TMSConnection.Create(self);
MSConnection.ConnectionTimeout := 5;
MSConnection.Server := 'SQLServer';
MSConnection.Username := 'User';
MSConnection.Password := 'Password';
MSConnection.Database := 'Database';
MSConnection.LoginPrompt := false;
MSConnection.Options.Provider := prDirect;
MSConnection.Options.AllowImplicitConnect := false;
MSQuery := TMSQuery.Create(self);
MSQuery.Connection := MSConnection;
MSQuery.Options.QueryRecCount := true;
MSQuery.SmartFetch.Enabled := true;
MSQuery.SQL.Text := 'select ID, MATCH, Image from PICTURE';
MSQuery.KeyFields := 'ID';
i := 0;
try
MSConnection.connected := true;
except
MSQuery.Active := false;
MSConnection.connected := false;
Memo1.Lines.add('Error Connection.Open');
abort;
end;
try
MSQuery.Active := true;
Progressbar1.Max := MSQuery.RecordCount;
except
MSQuery.Active := false;
MSConnection.connected := false;
Memo1.Lines.add('Error Query.Open');
abort;
end;
try
MSQuery.First;
except
MSQuery.Active := false;
MSConnection.connected := false;
Memo1.Lines.add('Error Query.First');
abort;
end;
while i < Progressbar1.Max do begin
try
// AV occurs when I manually break the Connection by closing the VPN
label1.Text := MSQuery.FieldByName('Match').AsString;
except
MSQuery.Active := false;
MSConnection.connected := false;
Memo1.Lines.add('Error reading Query.Match');
// here programm quits unexpectedly
abort;
end;
try
MSQuery.Next;
except
MSQuery.Active := false;
MSConnection.connected := false;
Memo1.Lines.add('Error Query.Next');
abort;
end;
inc(i);
ProgressBar1.Value := i;
Application.ProcessMessages;
end;
end;