99 lines
5.9 KiB
HTML
99 lines
5.9 KiB
HTML
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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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<meta name="DC.Title" content="SFLNXTCHG (Subfile Next Changed) keyword for display files" />
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<meta name="abstract" content="Use this record-level keyword on the subfile record format to force the workstation user to correct program-detected typing errors in subfile records that have been read by the program." />
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<meta name="description" content="Use this record-level keyword on the subfile record format to force the workstation user to correct program-detected typing errors in subfile records that have been read by the program." />
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<meta name="DC.subject" content="SFLNXTCHG (Subfile Next Changed) keyword, Subfile Next Changed (SFLNXTCHG) keyword" />
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<meta name="keywords" content="SFLNXTCHG (Subfile Next Changed) keyword, Subfile Next Changed (SFLNXTCHG) keyword" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
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<title>SFLNXTCHG (Subfile Next Changed) keyword for display files</title>
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</head>
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<body id="rzakcmstdfsfnch"><a name="rzakcmstdfsfnch"><!-- --></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">SFLNXTCHG (Subfile Next Changed) keyword for display files</h1>
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<div><p>Use this record-level keyword on the subfile record format to force
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the workstation user to correct program-detected typing errors in subfile
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records that have been read by the program.</p>
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<div class="section"><p>It does this by causing a record to be changed so that a get-next-changed
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operation must read the record as described in the following section.</p>
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<p>This
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keyword has no parameters.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Subfile operations with SFLNXTCHG</h4><p>A typical use
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of SFLNXTCHG can be as follows:</p>
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<p>A workstation user changes some records
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in a displayed subfile (this can be for a data-entry application or a data-update
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application). After changing some records, the workstation user presses the
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Enter key, and the program reads only the changed records with get-next-changed
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operations. (For example, READC in RPG III and READ-SUBFILE-NEXT-MODIFIED
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in COBOL.)</p>
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<p>If the program detects typing errors in the changed records,
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it can send update operations (UPDATE in RPG IV, REWRITE SUBFILE in COBOL)
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to the subfile records in error, setting indicators so that SFLNXTCHG is in
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effect during the update operations. These update operations are sent to the
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subfile record format.</p>
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<p>After all the records in error have been updated,
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the program sends an input/output operation to the subfile control record
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format to display the subfile again.</p>
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<p>With the subfile displayed again,
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the workstation user types the data again and presses the Enter key. If the
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data is correct, the program does not display the subfile again.</p>
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<p>The
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records in error (and any other records changed by the workstation user) are
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returned to the program on the next get-next-changed operation. This is because
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SFLNXTCHG caused the subfile records to be considered changed even though
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the workstation user did not change them. This allows the program to prohibit
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the workstation user from ignoring program-detected typing errors in subfile
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records.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Subfile operations without SFLNXTCHG</h4><p>If SFLNXTCHG
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is not specified, or is specified but not selected on the update operations
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to the subfile records, then the workstation user can press the
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Enter key instead of correcting the program-detected errors. The program then
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reads no records because the get-next-changed operations find no changed records
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the second time the Enter key is pressed.</p>
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<p>Option indicators are valid
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for this keyword.</p>
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<p>You cannot specify SFLNXTCHG with the SFLMSGRCD keyword.</p>
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</div>
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<div class="example"><h4 class="sectiontitle">Example</h4><p>The following example shows how to specify
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the SFLNXTCHG keyword.</p>
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<pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
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00010A R SFLR SFL
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00020A 14 SFLNXTCHG
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A*
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A* (at least one input-capable field should be specified)
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A*
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00040A R SFLCTLR SFLCTL(SFLR)
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00050A SFLPAG(17)
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00060A SFLSIZ(17)
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00070A SFLDSP SFLDSPCTL
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A</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="rzakcmstkeyent.htm" title="You type the keyword entries that define display files in positions 45 through 80 (functions).">DDS keyword entries for display files (positions 45 through 80)</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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