85 lines
4.5 KiB
HTML
85 lines
4.5 KiB
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<meta name="DC.Title" content="Stored procedure result sets" />
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<meta name="abstract" content="Define scrollable SQL stored procedure result sets." />
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<meta name="description" content="Define scrollable SQL stored procedure result sets." />
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<title>Stored procedure result sets</title>
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<body id="rzaikspresultsets"><a name="rzaikspresultsets"><!-- --></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">Stored procedure result sets</h1>
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<div><p>Define scrollable SQL stored procedure result sets.</p>
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<div class="section">An application can now have scrollable SQL stored procedure result
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sets when running to a V5R3 (or later) iSeries™ server. To take advantage of
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this support, make the following two changes. </div>
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<ol><li><span>Create the stored procedure with the cursor defined as scrollable. </span><ol type="a"><li class="substepexpand"><span>This is done by adding the SCROLL keyword into the CREATE PROCEDURE.</span> In the following two examples, the first stored procedure returns
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a scrollable result set while the second one does not. <ul><li><pre>CREATE PROCEDURE MYLIB.SCROLLSP ( ) RESULT SETS 1 LANGUAGE SQL
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sqlproc: begin
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DECLARE CUR1 SCROLL CURSOR FOR
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SELECT * FROM QIWS.QCUSTCDT;
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OPEN CUR1;
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SET RESULT SETS CURSOR CUR1;
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end </pre>
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</li>
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<li><pre>CREATE PROCEDURE MYLIB.NOSCROLLSP ( ) RESULT SETS 1 LANGUAGE SQL
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sqlproc: begin
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DECLARE CUR1 CURSOR FOR
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SELECT * FROM QIWS.QCUSTCDT;
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OPEN CUR1;
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SET RESULT SETS CURSOR CUR1;
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end</pre>
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</li>
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</ul>
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</li>
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</ol>
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</li>
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<li><span>Code the application using ODBC to ask for a scrollable cursor
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type. </span><ol type="a"><li class="substepexpand"><span>Call the SQLSetStmtAttr API. </span></li>
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<li class="substepexpand"><span>Set the SQL_ATTR_CURSOR_TYPE option to SQL_CURSOR_DYNAMIC. </span> <p>If an attempt is made to scroll backwards with a stored procedure
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that did not specify a scrollable cursor, several different problems can occur.
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In most cases an error is returned from the server indicating scrolling is
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invalid, and in some cases incorrect data is returned.</p>
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<p>Even if the stored
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procedure returns multiple result sets, you can only use one cursor type.
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ODBC either returns an error or ignores the cursor type when a different
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cursor type is specified for the second result set. To use a scrollable result
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set as one of the result sets, the application needs to set the cursor type
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to be scrollable as defined above.</p>
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<p>Any attempts to use an updateable
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cursor with a stored procedure is ignored. Stored procedure result sets are
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read-only.</p>
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<p>Cursor sensitivity may not be honored with stored procedure
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result sets. Cursor sensitivity is controlled by the way the server cursor
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is defined when creating the procedure.</p>
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</li>
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</ol>
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</li>
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</ol>
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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="rzaikodbcstoredproc.htm" title="Stored procedures commonly are used in client/server applications, especially in the area of online transaction processing (OLTP), since they can provide performance, transaction-integrity and security benefits.">Stored procedures</a></div>
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