124 lines
6.6 KiB
HTML
124 lines
6.6 KiB
HTML
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<meta name="DC.Title" content="Example: Create a procedure with input and output parameters" />
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<meta name="abstract" content="This example shows how to access a database and then create a procedure with input and output parameters." />
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<meta name="description" content="This example shows how to access a database and then create a procedure with input and output parameters." />
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<meta name="DC.Relation" scheme="URI" content="callproc.htm" />
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<title>Example: Create a procedure with input and output parameters</title>
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</head>
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<body id="callexample2"><a name="callexample2"><!-- --></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">Example: Create a procedure with input and output parameters</h1>
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<div><p>This example shows how to access a database and then create a procedure
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with input and output parameters.</p>
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<div class="section"><div class="note"><span class="notetitle">Note:</span> Read the <a href="codedisclaimer.htm">Code example disclaimer</a> for
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important legal information.</div>
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<pre>import java.sql.*;
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import java.util.Properties;
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public class CallableStatementExample2 {
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public static void main(java.lang.String[] args) {
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// Register the Native JDBC driver. If we cannot
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// register the driver, the test cannot continue.
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try {
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Class.forName("com.ibm.db2.jdbc.app.DB2Driver");
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// Create the connection properties
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Properties properties = new Properties ();
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properties.put ("user", "userid");
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properties.put ("password", "password");
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// Connect to the local iSeries database
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Connection c = DriverManager.getConnection("jdbc:db2://*local", properties);
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Statement s = c.createStatement();
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// Create a procedure with in, out, and in/out parameters.
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String sql = "CREATE PROCEDURE MYLIBRARY.SQLSPEX2 " +
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"(IN P1 INTEGER, OUT P2 INTEGER, INOUT P3 INTEGER) " +
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"LANGUAGE SQL SPECIFIC MYLIBRARY.SQLSPEX2 " +
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"EX2: BEGIN " +
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" SET P2 = P1 + 1; " +
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" SET P3 = P3 + 1; " +
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"END EX2 ";
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try {
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s.executeUpdate(sql);
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} catch (SQLException e) {
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// NOTE: We are ignoring the error here. We are making
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// the assumption that the only reason this fails
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// is because the procedure already exists. Other
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// reasons that it could fail are because the C compiler
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// is not found to compile the procedure or because
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// collection MYLIBRARY does not exist on the system.
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}
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s.close();
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// Prepare a callable statement used to run the procedure.
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CallableStatement cs = c.prepareCall("CALL MYLIBRARY.SQLSPEX2(?, ?, ?)");
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// All input parameters must be set and all output parameters must
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// be registered. Notice that this means we have two calls to make
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// for an input output parameter.
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cs.setInt(1, 5);
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cs.setInt(3, 10);
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cs.registerOutParameter(2, Types.INTEGER);
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cs.registerOutParameter(3, Types.INTEGER);
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// Run the procedure
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cs.executeUpdate();
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// Verify the output parameters have the desired values.
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System.out.println("The value of P2 should be P1 (5) + 1 = 6. --> " + cs.getInt(2));
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System.out.println("The value of P3 should be P3 (10) + 1 = 11. --> " + cs.getInt(3));
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cs.close(); // close the CallableStatement object
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c.close(); // close the Connection object.
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} catch (Exception e) {
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System.out.println("Something failed..");
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System.out.println("Reason: " + e.getMessage());
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e.printStackTrace();
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}
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}
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}</pre>
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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="callable.htm" title="The CallableStatement interface extends PreparedStatement and provides support for output and input/output parameters. The CallableStatement interface also has support for input parameters that is provided by the PreparedStatement interface.">CallableStatements</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="callproc.htm" title="Processing SQL stored procedure calls with a CallableStatement object is accomplished with the same methods that are used with a PreparedStatement object.">Process CallableStatements</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="callexample1.htm" title="This example shows how to access a database and then create a procedure with multiple ResultSets.">Example: Create a procedure with multiple ResultSets</a></div>
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<div><a href="callexample3.htm" title="This example shows how to access a database and then create a procedure with return values.">Example: Create a procedure with return values</a></div>
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</div>
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</div>
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</body>
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</html> |