159 lines
9.7 KiB
HTML
159 lines
9.7 KiB
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<meta name="DC.Title" content="iSeries server support" />
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<meta name="abstract" content="The default CCSID for a job on the iSeries server is specified using the Change Job (CHGJOB) command." />
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<meta name="description" content="The default CCSID for a job on the iSeries server is specified using the Change Job (CHGJOB) command." />
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<meta name="DC.subject" content="Coded Character Set Identifier (CCSID), in user profile, CCSID (coded character set identifier), in user profile, user profile, CCSID, changing, tagging, how data is translated" />
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<meta name="keywords" content="Coded Character Set Identifier (CCSID), in user profile, CCSID (coded character set identifier), in user profile, user profile, CCSID, changing, tagging, how data is translated" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>iSeries server support</title>
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</head>
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<body id="rbal1serversupport"><a name="rbal1serversupport"><!-- --></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"><span class="keyword">iSeries server</span> support</h1>
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<div><p>The default CCSID for a job on the <span class="keyword">iSeries™ server</span> is
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specified using the <span class="cmdname">Change Job (CHGJOB)</span> command.</p>
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<div class="section"><p>If a CCSID is not specified in this way, the job CCSID is obtained
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from the CCSID attribute of the user profile. If a CCSID is not specified
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on the user profile, the system gets it from the QCCSID system value. This
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QCCSID value is initially set to 65535. If your server is in a distributed
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relational database with unlike systems, it might not be able to use CCSID
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65535.</p>
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</div>
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<div class="section"><p>All control information that flows between the application requester
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(AR) and application server (AS) is in CCSID 500 (a DRDA<sup>®</sup> standard). This is information such
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as collection names, table names, and some descriptive text. Using variant
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characters for control information causes these names to be converted, which
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can affect performance. Package names are also sent in CCSID 500. Using variant
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characters in a package name causes the package name to be converted. This
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means the package is not found at run time.</p>
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</div>
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<div class="section"><p>After a job has been initiated, you can change the job CCSID by
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using the <span class="cmdname">Change Job (CHGJOB)</span> command. To do this: </p>
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</div>
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<div class="section"> <ol><li> Enter the Work with Job (WRKJOB) command to get the Work with Jobs display.</li>
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<li> Select option 2 (Display job definition attributes). This locates the
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current CCSID value so you can reset the job to its original CCSID value later. </li>
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<li> Enter the Change Job (CHGJOB) command with the new CCSID value.</li>
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</ol>
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</div>
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<div class="section"><p>The new CCSID value is reflected in the job immediately. However,
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if the job CCSID you change is an AR job, the new CCSID does not affect the
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work being done until the next CONNECT.</p>
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</div>
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<div class="section"> <div class="attention"><span class="attentiontitle">Attention:</span> If you change the CCSID of an AS job, the
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results cannot be predicted.</div>
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</div>
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<div class="section"><p>Source files are tagged with the job CCSID if a CCSID is not explicitly
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specified on the Create Source Physical File (CRTSRCPF) or Create Physical
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File (CRTPF) command for source files. Externally described database files
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and tables are tagged with the job CCSID if a CCSID is not explicitly specified
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in data description specification (DDS), in interactive data definition utility
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(IDDU), or in the CREATE TABLE SQL statement. </p>
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</div>
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<div class="section"><p>For source and externally described files, if the job CCSID is
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65535, the default CCSID based on the language of the operating system is
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used. Program described files are tagged with CCSID 65535. Views are tagged
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with the CCSID of its corresponding table tag or column-level tags. If a view
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is defined over several tables, it is tagged at the column level and assumes
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the tags of the underlying columns. Views cannot be explicitly tagged with
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a CCSID. The system automatically converts data between the job and the table
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if the CCSIDs are not equal and neither of the CCSIDs is equal to 65535.</p>
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</div>
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<div class="section"><p>When you change the CCSID of a tagged table, it cannot be tagged
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at the column level or have views defined on it. To change the CCSID of a
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tagged table, use the Change Physical File (CHGPF) command. To change a table
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with column-level tagging, you must create it again and copy the data to a
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new table using FMT(*MAP) on the Copy File (CPYF) command. When a table has
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one or more views defined, you must follow these steps to change the table: </p>
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</div>
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<div class="section"> <ol><li>Save the view and table along with their access paths.</li>
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<li>Delete the views.</li>
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<li>Change the table.</li>
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<li>Restore the views and their access paths over the created table.</li>
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</ol>
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</div>
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<div class="section"><p>Source files and externally described files migrated to <span class="keyword">DB2 Universal Database™ for iSeries</span> that are not tagged or are
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implicitly tagged with CCSID 65535 will be tagged with the default CCSID based
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on the language of the operating system installed. This includes files that
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are on the system when you install a new release and files that are restored
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to <span class="keyword">DB2<sup>®</sup> UDB for iSeries</span>.</p>
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</div>
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<div class="section"><p>All data that is sent between an AR and an AS is sent not converted.
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In addition, the CCSID is also sent. The receiving job automatically converts
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the data to its own CCSID if it is different from the way the data is tagged.
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For example, consider the following application that is run on a dealership
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system, KC105. </p>
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</div>
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<div class="section"><div class="note"><span class="notetitle">Note:</span> By using the code examples, you agree to the terms of the <a href="codedisclaimer.htm">Code license and disclaimer information</a>.</div>
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<pre>CRTSQL<em>xxx</em> PGM(PARTS1) COMMIT(*CHG) RDB(KC000)
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PROC: PARTS1;
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.
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.
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EXEC SQL
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SELECT * INTO :PARTAVAIL
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FROM INVENTORY
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WHERE ITEM = :PARTNO;
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.
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.
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END PARTS1;</pre>
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</div>
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<div class="section"><p>In the preceding example, the local system (KC105) has the QCCSID
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system value set at CCSID 37. The remote regional center (KC000) uses CCSID
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937 and all its tables are tagged with CCSID 937. CCSID processing takes place
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as follows: </p>
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<ul><li>The KC105 system sends an input host variable (:PARTNO) in CCSID 37.
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(The DECLARE VARIABLE SQL statement can be used if the CCSID of the job is
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not appropriate for the host variable.)</li>
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<li>The KC000 system converts :PARTNO to CCSID 937, selects the required data,
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and sends the data back to KC105 in CCSID 937.</li>
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<li>When KC105 gets the data, it converts the data to CCSID 37 and places
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it in :PARTAVAIL for local use.</li>
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</ul>
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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="rbal1ccsid.htm" title="Support for the national language of any country requires the proper handling of a minimum set of characters.">Coded character set identifier</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="rbal1xplat.htm" title="This topic collection concentrates on describing iSeries support for distributed relational databases in a network of iSeries servers (a like environment).">User FAQs</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="../cl/chgjob.htm">Change Job (CHGJOB) command</a></div>
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<div><a href="../cl/chgpf.htm ">Change Physical File (CHGPF) command</a></div>
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<div><a href="../cl/cpyf.htm">Copy File (CPYF) command</a></div>
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<div><a href="../cl/crtpf.htm">Create Physical File (CRTPF) command</a></div>
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<div><a href="../cl/crtsrcpf.htm">Create Source Physical File (CRTSRCPF) command</a></div>
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<div><a href="../cl/wrkjob.htm">Work with Job (WRKJOB) command</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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