74 lines
4.7 KiB
HTML
74 lines
4.7 KiB
HTML
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<meta name="DC.Title" content="Step 3: Specify what to do when end-of-data is reached" />
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<meta name="abstract" content="To find out when the end of the result table is reached, test the SQLCODE field for a value of 100 or test the SQLSTATE field for a value of '02000' (that is, end-of-data). This condition occurs when the FETCH statement has retrieved the last row in the result table and your program issues a subsequent FETCH." />
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<meta name="DC.subject" content="cursor, end-of-data, example, examples, WHENEVER NOT FOUND clause, clause, WHENEVER NOT FOUND" />
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<title>Step 3: Specify what to do when end-of-data is reached</title>
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</head>
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<body id="rbafycurs3"><a name="rbafycurs3"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Step 3: Specify what to do when end-of-data is reached</h1>
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<div><p>To find out when the end of the result table is reached, test the
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SQLCODE field for a value of 100 or test the SQLSTATE field for a value of
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'02000' (that is, end-of-data). This condition occurs when the FETCH statement
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has retrieved the last row in the result table and your program issues a subsequent
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FETCH.</p>
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<div class="section"><p>For example:</p>
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<pre>…
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IF SQLCODE =100 GO TO DATA-NOT-FOUND.
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or
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IF SQLSTATE ='02000' GO TO DATA-NOT-FOUND.</pre>
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</div>
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<div class="section"><p>An alternative to this technique is to code the WHENEVER statement.
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Using WHENEVER NOT FOUND can result in a branch to another part of your program,
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where a CLOSE statement is issued. The WHENEVER statement looks like this:</p>
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<pre>EXEC SQL
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<strong>WHENEVER NOT FOUND GO TO</strong> symbolic-address
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END-EXEC.</pre>
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</div>
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<div class="section"><p>Your program should anticipate an end-of-data condition whenever
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a cursor is used to fetch a row, and should be prepared to handle this situation
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when it occurs.</p>
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</div>
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<div class="section"><p>When you are using a serial cursor and the end-of-data is reached,
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every subsequent FETCH statement returns the end-of-data condition. You cannot
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position the cursor on rows that are already processed. The CLOSE statement
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is the only operation that can be performed on the cursor.</p>
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</div>
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<div class="section"><p>When you are using a scrollable cursor and the end-of-data is
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reached, the result table can still process more data. You can position the
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cursor anywhere in the result table using a combination of the position options.
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You do not need to CLOSE the cursor when the end-of-data is reached.</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafycursorexamp.htm" title="Suppose your program examines data about people in department D11. The following examples show the SQL statements you would include in a program to define and use a serial and a scrollable cursor.">Examples: Use a cursor</a></div>
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</div>
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</div>
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</body>
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