82 lines
6.2 KiB
HTML
82 lines
6.2 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Create ResultSets" />
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<meta name="abstract" content="To create a ResultSet object, you can use executeQuery methods, or other methods. This article describes options for creating ResultSets." />
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<meta name="description" content="To create a ResultSet object, you can use executeQuery methods, or other methods. This article describes options for creating ResultSets." />
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<meta name="DC.Relation" scheme="URI" content="rsltsets.htm" />
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<meta name="DC.Relation" scheme="URI" content="rsltchar.htm" />
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<meta name="DC.Relation" scheme="URI" content="rsltcurs.htm" />
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<meta name="DC.Relation" scheme="URI" content="rsltdata.htm" />
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<meta name="DC.Relation" scheme="URI" content="rsltchng.htm" />
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<meta name="DC.Relation" scheme="URI" content="resultex.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rsltclse" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Create ResultSets</title>
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</head>
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<body id="rsltclse"><a name="rsltclse"><!-- --></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">Create ResultSets</h1>
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<div><p>To create a ResultSet object, you can use executeQuery methods,
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or other methods. This article describes options for creating ResultSets.</p>
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<p>These methods are from the <a href="statemnt.htm">Statement</a>, <a href="prepstat.htm">PreparedStatement</a>, or <a href="callable.htm">CallableStatement</a> interfaces.
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There are, however, other available methods. For example, <a href="datameta.htm">DatabaseMetaData
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methods</a> such as getColumns, getTables, getUDTs, getPrimaryKeys, and
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so on, return ResultSets. It is also possible to have a single SQL statement
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return multiple ResultSets for processing. You can also use the getResultSet
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method to retrieve a ResultSet object after calling the execute method provided
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by the Statement, PreparedStatement, or CallableStatement interfaces.</p>
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<p>See <a href="callexample1.htm">Example: Create a procedure with multiple
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ResultSets</a> for more information.</p>
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<div class="section"><h4 class="sectiontitle">Close ResultSets</h4><p>While a ResultSet object is automatically
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closed when the Statement object with which it is associated closes, it is
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recommended that you close ResultSet objects when you are finished using them.
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By doing so, you immediately free internal database resources that can increase
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application throughput.</p>
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<p>It is also important to close ResultSets generated
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by DatabaseMetaData calls. Because you do not directly have access to the
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Statement object that was used to create these ResultSets, you do not call
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close on the Statement object directly. These objects are linked together
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in such a way that the JDBC driver closes the internal Statement object when
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you close the external ResultSet object. When these objects are not closed
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manually, the system continues to work; however, it uses more resources than
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is necessary.</p>
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<div class="note"><span class="notetitle">Note:</span> The holdability characteristic of ResultSets can also
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close ResultSets automatically on you behalf. Calling close multiple times
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on a ResultSet object is allowed. </div>
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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="rsltsets.htm" title="The ResultSet interface provides access to the results generated by running queries. Conceptually, data of a ResultSet can be thought of as a table with a specific number of columns and a specific number of rows. By default, the table rows are retrieved in sequence. Within a row, column values can be accessed in any order.">ResultSets</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="rsltchar.htm" title="This topic discusses ResultSet characteristics such ResultSet types, concurrency, ability to close the ResultSet by committing the connection object, and specification of ResultSet characteristics.">ResultSet characteristics</a></div>
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<div><a href="rsltcurs.htm" title="The iSeries Java Database Connectivity (JDBC) drivers support scrollable ResultSets. With a scrollable ResultSet, you can process rows of data in any order using a number of cursor-positioning methods.">Cursor movement</a></div>
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<div><a href="rsltdata.htm" title="The ResultSet object provides several methods for obtaining column data for a row. All are of the form get<Type>, where <Type> is a Java data type. Some examples of these methods include getInt, getLong, getString, getTimestamp, and getBlob. Nearly all of these methods take a single parameter that is either the column index within the ResultSet or the column name.">Retrieve ResultSet data</a></div>
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</div>
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<div class="reltasks"><strong>Related tasks</strong><br />
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<div><a href="rsltchng.htm" title="With the iSeries JDBC drivers, you can change ResultSets by performing several tasks.">Change ResultSets</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="resultex.htm" title="This is an example of how to use the ResultSet interface.">Example: ResultSet interface for IBM Developer Kit for Java</a></div>
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</div>
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</div>
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</body>
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</html>
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