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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>
      <p class="line">&nbsp; </p>
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      <h2>OABEGIN</h2>
      <p>Marks the beginning of an update transaction for oacommit and oarollback. 
        It is one of four routines that support transaction management from within 
        OmniAccess.</p>
      <p>Before you begin an update transaction that uses the OmniAccess index-access 
        routines, call oabegin. oabegin marks the beginning of an indexing transaction.</p>
      <p>If the corresponding native transaction is committed, call oacommit to 
        commit all corresponding indexing operations from the most recent oabegin 
        forward.</p>
      <p>If the corresponding native transaction fails and is rolled back, oabegin 
        serves as a point of reference for the rollback. If no savepoint was specified 
        in a call to oarollback, the indexing transaction is rolled back to the 
        point where oabegin was called, and you must call oabegin again to log 
        another indexing transaction.</p>
      <p>Therefore, depending on the complexity of an indexing transaction, you 
        may want to call oasavepoint after calling oabegin. That way you can roll 
        back all transactions to that savepoint and try the indexing transaction 
        again instead of having to call oabegin to start over.</p>
      <p>Transaction management applies to the Omnidex indexes only. If transaction 
        management is required for the database, use the DBMS transaction management 
        system.</p>
      <p><strong>See Also:</strong> <a href="../../../Utilities/ODXAIM/ODXAIM.htm">ODXAIM</a></p>
      <p class="line">&nbsp;</p>
      <h3><a name="syntax"></a>Syntax</h3>
      <p class="ex">oabegin (instance, options, status)</p>
      <p class="indent">instance -- identifies a unique connection to a catalog 
        previously established by oaconnect. This is a 32-bit signed integer passed 
        by value.</p>
      <p class="indent">options -- Options is a character string, passed by reference, 
        that indicates the action or actions for oabegin to take. Terminate the 
        option list with a semicolon or null character. If options contains only 
        a semicolon or null character, oabegin defaults to the DELAYED option.</p>
      <p class="indent">status -- Indicates the success or failure of the oabegin 
        routine. A zero status.error means a successful call to oabegin. See Status 
        Structure.</p>
      <p class="line">&nbsp;</p>
      <h3><a name="options"></a>Options</h3>
      <p class="indent">CONCURRENT -- </p>
      <p class="indent">DELAYED -- Default. Causes subsequent indexing transactions 
        to be posted only after a call to either oacommit, or oasavepoint with 
        the ROLLFORWARD option.</p>
      <p class="indent">IMMEDIATE -- causes subsequent indexing transactions to 
        be posted immediately.</p>
      <p class="indent">FILENAME -- specifies the name of the transaction log 
        file.</p>
      <p>&nbsp;</p>
      <p class="line">&nbsp;</p>
      <h3><a name="example"></a>Example</h3>
      <p class="indent">&nbsp;</p>
      <p>&nbsp;</p>
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