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Article #1369Asynchronous queries
From: Star
Date: Tue, 27 Jul 2004 22:59
Date: Tue, 27 Jul 2004 22:59
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1350 bytes
Hi, I have very big table (about 50 million records). I usually make some queries on this table, and it can take several minutes to run. Is there anyway to start getting records as soon as there is one available? I thought I could use something like this: ADODataSet1->CommandText = "SELECT Code From Subs_Subjects"; ADODataSet1->ExecuteOptions = ADODataSet1->ExecuteOptions << eoAsyncFetch; ADODataSet1->Open(); Is that the way to do it? Should I get an event for every new record returned? In that case, what event should I look at? Thanks
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X-Google-Thread: 10698b,e0caeb4fee49b407,start X-Google-Attributes: gid10698b,public X-Google-Language: ENGLISH,ASCII-7-bit From: "Star" <---> Newsgroups: borland.public.cppbuilder.database.ado Subject: Asynchronous queries Date: Tue, 27 Jul 2004 18:59:06 -0400 Lines: 20 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1437 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 NNTP-Posting-Host: 209.227.134.122 Message-ID: <4106de81$1@newsgroups.borland.com> X-Trace: newsgroups.borland.com 1090969217 209.227.134.122 (27 Jul 2004 16:00:17 -0700) Path: arc1-ca.pugleaf.net!g2news1.google.com!news2.google.com!fu-berlin.de!newsfeed.iinet.net.au!newsfeed.iinet.net.au!PeerFeed.KWeb.on.ca!news.kweb.on.ca!newsgroups.borland.com!not-for-mail