Article View: borland.public.interbase.sql
Article #850Re: How to use a an integer parameter to fetch parameter = "N" or all rows.
From: Mitch
Date: Wed, 30 May 2007 16:33
Date: Wed, 30 May 2007 16:33
35 lines
2086 bytes
2086 bytes
Wayne Niddery [TeamB] wrote: > Mitch wrote: >> How can I easily query an integer column to get all the rows matching >> an integer or also allow all rows to be fetched? EG: >> >> Item.Project (integer) >> Item.Location (integer) >> >> (Case 1) >> Select * from Item where >> Project = :ProjectID and Location = :LocationID >> >> (Case 2) >> Select * from Item where >> Project = :ProjectID and Location = all locations > > If you really cannot change the SQL to drop the location condition, then the > only way is to test the parameter in the SQL as well, but doing this will > mess up use of indexes and thus may result in poor performance - you'll have > to test this: > > Select * from Item where > (Project = :ProjectID or :ProjectID is null) > and > (Location = :LocationID or :LocationID is null) > > Thanks Wayne. This seems to be working: WHERE ProjectID = :ProjectID and (LocationID = :LocationID or :all_locations =1 ) If I set :all_locations = 0 then only locationID shows. If I set :all_locations = 1 then all locationIDs show.
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X-Google-Thread: 114a0e,d43d3e3c175ab47e X-Google-Attributes: gid114a0e,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Date: Wed, 30 May 2007 17:33:18 +0100 From: Mitch <mmm@yyy.com> User-Agent: Thunderbird 2.0.0.0 (Windows/20070326) MIME-Version: 1.0 Newsgroups: borland.public.interbase.sql Subject: Re: How to use a an integer parameter to fetch parameter = "N" or all rows. References: <465d29fa$1@newsgroups.borland.com> <465d8a1c$1@newsgroups.borland.com> In-Reply-To: <465d8a1c$1@newsgroups.borland.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit NNTP-Posting-Host: 82.152.165.26 Message-ID: <465da751$1@newsgroups.borland.com> X-Trace: newsgroups.borland.com 1180542801 82.152.165.26 (30 May 2007 09:33:21 -0700) Lines: 35 Path: arc1-ca.pugleaf.net!g2news1.google.com!news2.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mail