Article View: pl.comp.lang.delphi
Article #96Re: Jak usunac rekordy
From: Patryk P. Nowak
Date: Thu, 18 Sep 1997 10:33
Date: Thu, 18 Sep 1997 10:33
69 lines
2728 bytes
2728 bytes
Chudzik wrote:
>
> Witam.
> Mam maly problem.
> Jesli bazie danych wydam polecenie
> usuniecia rekordow przy pomocy SQL
> DELETE FROM MojaBaza, rekordy sa
> jedynie zaznaczane jako usuniete.
> Jak mozna usunac je calkowicie (z pliku),
> aby nie zasmiecaly bazy.
> Chudzik.
Ja skorzystalem z przykladu na pakowanie tabel i nieco go
przerobilem, teraz wyglada tak:
function PackTable(TableToPack: TTable): boolean;
var
crtd : CRTblDesc;
db : TDataBase;
oldconnected : boolean;
oldactive : boolean;
oldexclusive : boolean;
packresult : DBIResult;
begin
try
Result := true;
with TableToPack do
begin
{jeśli Active = false to Database = nil!!!}
oldactive := Active;
oldexclusive := Exclusive;
db := Database;
oldconnected := db.Connected;
Active := true;
{ale do pakowania musi być false}
Active := false;
Exclusive := true;
db.Connected := true;
FillChar(crtd,SizeOf(CRTblDesc),0);
StrPCopy(crtd.szTBlName,TableName);
crtd.bPack := True;
packresult := DbiDoRestructure(db.Handle,1,@crtd, nil, nil,
nil, false);
if packresult <> DBIERR_NONE
then
Result := false;
db.Connected := oldconnected;
Exclusive := oldexclusive;
Active := oldactive;
Open;
end;
except
on Exception do
Result := false;
end;
end;
Pozdrawiam -
P.
---------------------------------------------------------------------------
Patryk P. Nowak Ph.D. student on Technical University of
Gdansk
"...You may say I'm a dreamer, but I'm not the only one..."
e-mail: patrykp@eti.pg.gda.pl
http://www.ue.eti.pg.gda.pl/~patrykp/
Poglady wyglaszane przez autora nie zawsze sa zgodne z pogladami autora.
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Path: mbox-mo1.pugleaf.net!news-archive.icm.edu.pl!pingwin.icm.edu.pl!agh.edu.pl!ict.pwr.wroc.pl!news.icm.edu.pl!news.task.gda.pl!sunrise.pg.gda.pl!not-for-mail From: "Patryk P. Nowak" <patrykp@eti.pg.gda.pl> Newsgroups: pl.comp.lang.delphi Subject: Re: Jak usunac rekordy Date: Thu, 18 Sep 1997 12:33:13 +0200 Organization: Technical University of Gdańsk Lines: 69 Message-ID: <34210369.3CAE@eti.pg.gda.pl> References: <5vdu0j$7e4$1@okapi.ict.pwr.wroc.pl> NNTP-Posting-Host: knot255.eti.pg.gda.pl Mime-Version: 1.0 X-Mailer: Mozilla 3.01Gold (Win95; I) Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit