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      <h1>OmniAccess API - Functions</h1>
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      <p><a href="#syntax">Syntax</a></p>
      <p><a href="#options">Options</a></p>
      <p><a href="#example">Example</a></p>
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      <h2>OAROLLBACK</h2>
      <p>oarollback rolls back an indexing transaction that involves oadeleteindex, 
        oainsertindex, or oaupdateindex, to the most recent call to oabegin, or 
        to a savepoint set in a call to oasavepoint.</p>
      <p>This includes index transactions that were posted using oabegin&#8217;s 
        IMMEDIATE option or oasavepoint&#8217;s IMMEDIATE or ROLLFORWARD option. 
        Once rolled back to oabegin, index updates cannot be rolled forward again 
        or committed, and the entire indexing transaction is cancelled. Therefore, 
        the update application should verify that the native update failed before 
        calling oarollback to roll back the corresponding updates to Omnidex indexes.</p>
      <p>When you roll back to a savepoint, as passed through the savepoint parameter, 
        you don&#8217;t cancel the entire transaction. You only negate the portion 
        of the transaction that failed. Therefore, you may want to set savepoints 
        at strategic points in a series of update transactions</p>
      <p><img src="../../../images/note.gif" width="12" height="15">Transaction 
        management applies to the Omnidex indexes only. If transaction management 
        is required for the database, use the DBMS transaction management system.</p>
      <p>See Also: <a href="../../../Utilities/ODXAIM/ODXAIM.htm">ODXAIM</a></p>
      <p class="line">&nbsp;</p>
      <h3><a name="syntax"></a>Syntax</h3>
      <P class="ex">oarollback (instance, options, status, savepoint)</P>
                  <P class="indent"><strong>instance </strong>-- Identifies the 
                    unique connection to a catalog established by calling oaconnect. 
                    Instance is a 32-bit signed integer passed by value.</P>
                  <P class="indent"><strong>options </strong>-- Is a character 
                    string, passed by reference, that indicates the action(s) 
                    for oarollback to take. Terminate the option list with a semicolon 
                    or a null character. If options contains only a semicolon 
                    or null character, oasavepoint defaults to the DELAYED option.</P>
                  <P class="indent"><strong>status </strong>-- Indicates the success 
                    or failure of the oarollback routine. A zero status.error 
                    means a successful call to oarollback. The status structure 
                    is passed by reference and contains fourteen 32-bit signed 
                    integers, followed by a 36-character buffer.</P>
                  <P class="indent"><strong>savepoint </strong>-- Is a character 
                    string passed by reference that declares a particular savepoint 
                    set by a preceding call to oasavepoint. If a rollback is required, 
                    oarollback undoes index transactions back to this point. This 
                    prevents the cancellation of an entire transaction.</P>
	  <p>&nbsp;</p>
      <p class="line">&nbsp;</p>
      <h3><a name="options"></a>Options</h3>
      <P class="indent"><strong>DELAYED</strong> -- causes subsequent 
                    indexing transactions to be posted only after a call to either 
                    oacommit, or oasavepoint with the ROLLFORWARD option.</P>
                  <P class="indent"><strong>IMMEDIATE</strong> -- causes subsequent 
                    indexing transactions to be posted immediately.</P>
	  <p>&nbsp;</p>
      <p class="line">&nbsp;</p>
      <h3><a name="example"></a>Example</h3>
      <p>&nbsp;</p>
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