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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>OAOPENCURSOR</h2>
      <p>oaopencursor establishes a working space or &#8220;cursor&#8221; that 
        maintains the environment for all OmniAccess procedure calls that reference 
        it.</p>
      <p>A cursor defines the environment for qualifying, retrieving, updating 
        and deleting rows. An example of information identified by the cursor 
        includes the current pointer in a qualified subset after an oaqualify 
        operation. Through the use of multiple cursors, it is possible to simultaneously 
        read different qualified subsets for the same table. Cursor is passed 
        as the first parameter of most of the OmniAccess routines.</p>
      <p class="line">&nbsp;</p>
      <h3><a name="syntax"></a>Syntax</h3>
<P class="ex">oaopencursor (instance, options, status, cursor)</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 the type of 
                    access to be used by this cursor. Options is a character value 
                    passed by reference, with a maximum length of 256 bytes, including 
                    a semicolon or null terminator. The valid options values are:</P>
                  <p class="indent"><strong>status </strong>-- Returns information 
                    about the success or failure of the oaopencursor routine. 
                    A zero in status word 1 indicates a successful oaopencursor 
                    call. 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>cursor </strong>-- Is a 32-bit signed 
                    integer passed by reference from oaopencursor. oaopencursor 
                    initializes cursorto an integer that identifies a working 
                    area of the environment for subsequent OmniAccess calls. If 
                    oaopencursor is not successful, cursor contains a zero.</p>
	  <p>&nbsp;</p>
      <p class="line">&nbsp;</p>
      <h3><a name="options"></a>Options</h3>
<p class="indent"><strong>DA </strong>-- causes all OmniAccess 
                    calls for that cursor to affect only the underlying data files.</p>
                  <p class="indent"><strong>IA</strong> -- causes all OmniAccess 
                    calls for that cursor to affect only the OMNIDEX index files.</p>
                  <p class="indent"><strong>IABASEID</strong> -- returns the TurboIMAGE 
                    base ID to status.data5 to support subsequent calls to ImagePlus 
                    intrinsics in that cursor.</p>
                  <p class="indent"><strong>OPTIMIZATION </strong>-- sets the 
                    selection optimization for oaselects and oalists using this 
                    cursor. Optimizations are set through an equation:</p>
                  <p class="ex">OPTIMIZATION='ASKQUAL,ASKRETRIEVAL'</p>
                  <p>The data access optimization you choose for oaselect supersedes 
                    any optimization you may have chosen for the cursor when you 
                    opened it with oaopencursor.</p>
                  <p class="indent"><strong>REQUIRED_OPTIMIZATION </strong>-- 
                    The Required Optimization feature enforces specified optimization 
                    rules on a select statement. In the event that a select statement 
                    cannot be optimized according to those rules, the select will 
                    stop processing and return an error. Subsequent operations 
                    against that select such as fetches and exports, will be disallowed. 
                    Required optimizations are set through an equation:</p>
                  <p class="ex">REQUIRED_OPTIMIZATION='NO_MULTIFINDS,NO_UNOPTIMIZED_CRITERIA'</p>
      <p>&nbsp;</p>
      <p class="line">&nbsp;</p>
      <h3><a name="example"></a>Example</h3>
      <p>&nbsp;</p>
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