🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: borland.public.cppbuilder.database.ado
Article #1926

Index search method to use

#1926
From: Alain M. Dube
Date: Wed, 21 Jan 2004 06:35
48 lines
2849 bytes
I've encountered a problem with ADO and Access:

My access database has five tables, each table as multiple indices.

I'm using a TADOConnection and a TADOTable to access the MS Access DB; code
below used to setup the objects:

#define CONNECT_STRING_FMT     "Provider=Microsoft.Jet.OLEDB.4.0;Data
Source=%s;User Id=admin;Password="

            // Create a DB Connection COM Object Instance
            mpConnection = new TADOConnection(NULL);
            mpConnection->ConnectOptions = coConnectUnspecified;
            mpConnection->CursorLocation = clUseClient;
            mpConnection->IsolationLevel = ilCursorStability;
            mpConnection->LoginPrompt = false;
            mpConnection->Mode = cmShareDenyNone;
            strConnectionString = Format(CONNECT_STRING_FMT,
OPENARRAY(TVarRec, (strMediaLibraryDBPath)));
            mpConnection->ConnectionString = strConnectionString;
            mpConnection->Connected = true;

            // Create a Table Object Instance for the Container Table
            mpContainerTable = new TADOTable(NULL);
            mpContainerTable->Active = false;
            mpContainerTable->Connection = mpConnection;
            mpContainerTable->CursorType = ctKeyset;
            mpContainerTable->TableName  = TABLE_NAME_CONTAINER;
            mpContainerTable->IndexName  = INDEX_NAME_PRIMARY;
            mpContainerTable->Active = true;

            {  ... repeat for each addition table...  }

I intend on doing all of the normal database management stuff:  a)  add,
modify and delete records, b) search tables using various indices, c)
transaction bracketing, etc.  What method is recommended for doing
index-based search using a relational operator?

example:  get record whose parentID >= 10

In DAO, the recordset.seek() allows a relational operator on one or more key
values against the current index.  Is there an equivalent?

Thanks in advance for your help.

Regards;

Al Dube
Technical Details
Message-ID: <400e1da8$1@newsgroups.borland.com>
Path: arc1-ca.pugleaf.net!archiver1.google.com!news2.google.com!news.maxwell.syr.edu!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mail

Show Full Headers
Complete Article Headers
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 10698b,cb3d0ba8006d975c,start
X-Google-Attributes: gid10698b,public
X-Google-ArrivalTime: 2004-01-20 22:39:38 PST
From: "Alain M. Dube" <adube@cadencesoftware.com>
Newsgroups: borland.public.cppbuilder.database.ado
Subject: Index search method to use
Date: Wed, 21 Jan 2004 01:35:18 -0500
Lines: 50
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
NNTP-Posting-Host: 24.2.157.230
Message-ID: <400e1da8$1@newsgroups.borland.com>
X-Trace: newsgroups.borland.com 1074666920 24.2.157.230 (20 Jan 2004 22:35:20 -0700)
Path: arc1-ca.pugleaf.net!archiver1.google.com!news2.google.com!news.maxwell.syr.edu!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mail