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      <h1>Omnidex Concepts - Index Maintenance</h1>
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      <p><a href="#updates">Periodic Updates</a></p>
      <p><a href="#manual">Build the Indexes Manually</a></p>
      <p><a href="#script">Build the Indexes Using a Script File</a></p>
      <p class="line">&nbsp;</p>
      <p>&nbsp;</p>
      <p>&nbsp;</p>
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      <h2>Building the Indexes</h2>
      <p>After designing the index installation, use the Omnidex utility, DBINSTAL, 
        to install the indexes onto the environment catalog. This step must be 
        performed prior to building the indexes.</p>
      <ul>
        <li>If this is a first time installation, you must perform this step manually, 
          specifying the indexes that are to be installed on each column.</li>
        <li>If you are reinstalling the indexes on a preexisting installation, 
          you can use a script file to perform this task. Use <a href="../../Utilities/OAHELPER/OAHELPER.htm">OAHELPER</a> 
          to automatically generate this script file from the existing installation.</li>
      </ul>
      <p><img src="../../images/note.gif" width="12" height="15">If the installation 
        has changed, you may want to do the installation manually and then generate 
        a new script file for future updates, rather than trying to modify and 
        existing script. Any errors in the script will cause the installation 
        to fail.</p>
      <p>To install the indexes manually, run DBINSTAL from a system prompt and 
        follow the screen prompts:</p>
      <p class="ex">&gt; dbinstal</p>
      <p>To use an installation script, run DBINSTAL from a system prompt and 
        pass the installation script as a command line argument:</p>
      <p class="ex">&gt; dbinstal &lt; install.in</p>
      <p class="line">&nbsp;</p>
      <h3><a name="updates"></a>Periodic Updates</h3>
      <p>It is a good idea to rebuild the indexes when online updates increase 
        the size of the database by 20% or more. This process repacks the indexes 
        and optimizes retrieval performance.</p>
      <p class="line">&nbsp;</p>
      <h3><a name="manual"></a>Build the Indexes Manually</h3>
      <p>To build the indexes manually, run DBINSTAL and enter the environment 
        catalog filespec at the Database or Environment: prompt. Indexes must 
        already be installed on this environment. Remember, installing the indexes 
        and building the indexes are two separate processes.</p>
      <p>Next , enter B for build at the Cmd: prompt, then enter a table name 
        or index name at the Table [;key] prompt. This causes DBINSTAL to build 
        the indexes for the specified table or index.</p>
      <p>DBINSTAL will display a message detailing the process, including the 
        number of rows in the table, the number of keys loaded into the indexes, 
        and the total CPU and Elapsed time it took to complete the build.</p>
      <p>Continue entering the B command and Table or Index name until all indexed 
        tables and aggregation index names have been entered.</p>
      <p><img src="../../images/note.gif" width="12" height="15">Child tables 
        linked to a parent table in the index installation, belong to the parent 
        domain and will be indexed at the same time the parent table is indexed. 
        Therefore, it is not necessary to separately build the indexes for a child 
        table.</p>
      <p class="line">&nbsp;</p>
      <h3><a name="script"></a>Build the Indexes Using a Script File</h3>
      <p>To rebuild the indexes on an environment catalog, where the index installation 
        did not change, it best to use a script file generated by OAHELPER. This 
        will prevent mistakes and inconsistencies between builds.</p>
      <p>Each line of this file is passed to DBINSTAL where each new line character 
        is treated as a carriage return. Every entry must match the DBINSTAL prompts 
        exactly or an error will occur. Therefore, be very careful when editing 
        this file.</p>
      <p>There are two ways to use a script file to build the indexes:</p>
      <p>1. Run DBiNSTAL and pass the batch file as an argument.</p>
      <p class="ex">&gt; dbinstal &lt; filespec</p>
      <p>2. Make sure the batch file is a system executable batch file, filename.bat 
        on Windows for instance, and include the command to run DBINSTAL as the 
        first line of the file.</p>
      <p class="ex">&gt; installindexes.bat</p>
      <p> The script file generated by OAHELPER also contains the script to install 
        the indexes. The scripts can be moved into separate files since it is 
        not always necessary to perform both actions at the same time.</p>
      <p>&nbsp;</p>
      <h3>&nbsp;</h3>
      <p>&nbsp;</p>
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