FireDAC.Comp.DataSet.TFDDataSet.OpenOrExecute
Delphi
function OpenOrExecute: Boolean;
C++
bool __fastcall OpenOrExecute();
Contents
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| function | public | FireDAC.Comp.DataSet.pas FireDAC.Comp.DataSet.hpp |
FireDAC.Comp.DataSet | TFDDataSet |
Description
Executes an SQL command and optionally opens the dataset.
Use the OpenOrExecute method if you do not know whether the command will return a result set or not. The most common case for that is the execution of an ad-hoc query.
The OpenOrExecute method executes an SQL command. If the command returns any result set, then OpenOrExecute opens the dataset. The method supplements the Open and Execute, ExecSQL, or ExecProc method:
- The Open method raises an exception (
"[FireDAC][Phys]-308. Command must return row set") if a command does not return the result set like theINSERTcommand. - The Execute, ExecSQL, and ExecProc methods raise an exception (
"[FireDAC][Phys]-310. Cannot execute command returning results set") if a command returns result the result set like theSELECTcommand.
When calling OpenOrExecute, a "[FireDAC][Phys]-308" exception might be raised, but it is not propagated out of the method.
Example
FDQuery1.Disconnect(True);
FDQuery1.SQL.Assign(Memo1.Lines);
if FDQuery1.OpenOrExecute then begin
PageControl1.ActivePage := DataGridPage;
DataGridPage.TabVisible := True;
end
else
DataGridPage.TabVisible := False;