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      <h1>OACOMP</h1>
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      <p><a href="#">Parsing Phase</a></p>
      <p><a href="#val">Validation Phase</a></p>
      <p><a href="#comp">Compilation Phase</a></p>
      <p class="line">&nbsp;</p>
      <p><a href="OACOMP.htm">OACOMP</a></p>
      <p>Phases</p>
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      <h2>Phases</h2>
      <h3>Parsing Phase</h3>
      <p>OACOMP begins by parsing the catalog source file specified at run time. 
        When OACOMP parses a catalog source file it:</p>
      <p>upshifts all alphabetic characters. Quoted file specifications and some 
        other quoted strings are not upshifted. <br>
        parses reserved words like TABLE and TYPE. <br>
        While parsing, OACOMP displays the string Parsing... on the terminal screen 
        as well as any syntax errors found. For example:</p>
      <p class="ex">[ -1001] Syntax error in token at line #13<br>
        TYPE MASTRE<br>
        ^</p>
      <p>In all syntax error messages, OACOMP displays the line number where the 
        error occurred. In the example above, it is line #13. Below the error 
        message, OACOMP displays the erroneous line with a caret below the first 
        letter of the incorrect token. In the example above, MASTRE is specified 
        incorrectly. The line should have read:</p>
      <p class="ex">TYPE MASTER</p>
      <p>After the parsing phase is successfully completed with no errors, the 
        validation phase is performed.</p>
      <p class="line">&nbsp;</p>
      <h3><a name="val"></a>Validation Phase</h3>
      <p>If your catalog source file is free of syntax errors, OACOMP validates 
        the entities (DATABASEs, TABLEs and so on) to be sure that all references 
        are logically consistent. As it validates the catalog, OACOMP displays 
        the string Parsed; Validating... on your terminal screen.</p>
      <p>When a declared entity has no definition within the catalog, OACOMP returns 
        an error message, like the one below, before aborting.</p>
      <p>[Parsed; Validating...</p>
      <p class="ex">[ 10008] Match not found (Column-Spec)</p>
      <p class="ex">&gt;CUSTOMER_NUM&lt;; Env=ORDERSEC; DB=ORDERS; Tbl=CUSTOMERS;</p>
      <p class="ex">Clause=PARENT</p>
      <p class="ex">%% Compilation ABORTED after 1 Validation error(s)! %%</p>
      <p>In all validation error messages, OACOMP displays the declaration where 
        the mismatch occurs.</p>
      <p>On the line below the error message, OACOMP displays the mismatched value 
        inside angle brackets (&gt;CUSTOMER_NUM&lt;, in the example above), and 
        tells where the mismatch occurs. In the example above, this is in the 
        ENVIRONMENT statement for ORDERSEC, the DATABASE statement for ORDERS, 
        the TABLE statement for CUSTOMERS, and in the PARENT clause.</p>
      <p>The key, CUSTOMER_NUM, declared for the table CUSTOMERS is not defined 
        for that table in a COLUMN statement.</p>
      <p>OACOMP does not validate the accuracy of external references to existing 
        data structures. It validates for cross references within the environment 
        catalog.</p>
      <p>If the validation phase of the compile completes successfully, OACOMP 
        compiles the environment source file.</p>
      <p class="line">&nbsp;</p>
      <h3><a name="comp"></a>Compilation Phase</h3>
      <p>When OACOMP compiles an environment catalog source file, it displays 
        the following string on the terminal screen:</p>
      <p class="ex">Parsed; Validated; Compiling...</p>
      <p>When the compile has completed successfully, OACOMP displays the following 
        and returns to an operating system prompt:</p>
      <p class="ex">Parsed; Validated; Compiled; Done</p>
      <p class="ex">** Environment Compiled Successfully! **</p>
      <p>If a compiled environment catalog by that name already exists, OACOMP 
        automatically overwrites the existing file with the new file. <br>
        If an existing file that is not an environment catalog bears the name 
        you assigned the compiled environment file, OACOMP issues an error during 
        the validation phase. </p>
      <p class="ex">Parsed; Validating...</p>
      <p class="ex">[ 40] Object file connect error (ORDERSEC), error=41999, info=0</p>
      <p>In the example above, &#8220;ORDERSEC&#8221;, which was assigned to the 
        compiled environment, conflicts with an existing file that is not an environment 
        catalog and is enclosed in parentheses in the error message.</p>
      <p>If the compile operation is successful, the compiled environment catalog 
        is created with the name specified at run time. After compiling, the environment 
        catalog is ready to be installed with OMNIDEX index keys through DBINSTAL 
        and accessed through the OmniAccess routines.</p>
      <p>Keep the source files for the environment catalogs. They provide useful 
        information about the data, and are therefore useful in resolving technical 
        support issues. They also serve as a backup, in case something happens 
        to a compiled environment catalog.</p>
      <p><img src="../../images/note.gif" width="12" height="15">When upgrading 
        to a new major version, 3.8 to 4.0 for example, oacomp will not recognize 
        an existing compiled environment catalog as an Omnidex environment catalog, 
        producing an error. If this occurs, you must manually delete the older 
        version environment catalog prior to running oacomp. This is not an issue 
        when upgrading a minor version, 4.0.6 to 4.0.8 for example.</p>
      <p>&nbsp;</p>
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