143 lines
8.9 KiB
HTML
143 lines
8.9 KiB
HTML
|
<?xml version="1.0" encoding="UTF-8"?>
|
||
|
|
<!DOCTYPE html
|
||
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html lang="en-us" xml:lang="en-us">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
|
|
<meta name="security" content="public" />
|
||
|
|
<meta name="Robots" content="index,follow" />
|
||
|
|
<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))' />
|
||
|
|
<meta name="DC.Type" content="concept" />
|
||
|
|
<meta name="DC.Title" content="Effect of changing the command definition of a command in a procedure or program" />
|
||
|
|
<meta name="abstract" content="Some changes can be made to the command definition of a command with no further action. Other changes may require the program or procedure to be recreated, or may cause the program or procedure to function differently." />
|
||
|
|
<meta name="description" content="Some changes can be made to the command definition of a command with no further action. Other changes may require the program or procedure to be recreated, or may cause the program or procedure to function differently." />
|
||
|
|
<meta name="DC.subject" content="command, CL, effect of changing definition, command definition, effect of changing, changing, command definition effect on program, CHGCMD (Change Command) command, Change Command (CHGCMD) command, CHGCMD (Change Command), Change Command (CHGCMD), command" />
|
||
|
|
<meta name="keywords" content="command, CL, effect of changing definition, command definition, effect of changing, changing, command definition effect on program, CHGCMD (Change Command) command, Change Command (CHGCMD) command, CHGCMD (Change Command), Change Command (CHGCMD), command" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="defcm.htm" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="chgcmddef.htm" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="chgcmddefex.htm" />
|
||
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
|
||
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
|
||
|
|
<meta name="DC.Format" content="XHTML" />
|
||
|
|
<meta name="DC.Identifier" content="ccdcp" />
|
||
|
|
<meta name="DC.Language" content="en-us" />
|
||
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
||
|
|
<!-- US Government Users Restricted Rights -->
|
||
|
|
<!-- Use, duplication or disclosure restricted by -->
|
||
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
||
|
|
<title>Effect of changing the command definition of a command in a procedure
|
||
|
|
or program</title>
|
||
|
|
</head>
|
||
|
|
<body id="ccdcp"><a name="ccdcp"><!-- --></a>
|
||
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
||
|
|
<h1 class="topictitle1">Effect of changing the command definition of a command in a procedure
|
||
|
|
or program</h1>
|
||
|
|
<div><p>Some changes can be made to the command definition of a command
|
||
|
|
with no further action. Other changes may require the program or procedure
|
||
|
|
to be recreated, or may cause the program or procedure to function differently.</p>
|
||
|
|
<p>When a CL module or program is created, the command definitions of the
|
||
|
|
commands in the procedure or program are used to generate the module or program.
|
||
|
|
When the CL procedure or program is run, the command definitions are also
|
||
|
|
used. If you specify a library name for the command in the CL procedure or
|
||
|
|
program, the command must be in the same library at procedure creation time
|
||
|
|
and at run time. If you specify *LIBL for the command in the CL procedure
|
||
|
|
or program, the command is found, both at procedure creation and run time,
|
||
|
|
using the library list (*LIBL).</p>
|
||
|
|
<div class="p">You can make the following changes to the command definition statements
|
||
|
|
for a command without recreating the modules and programs that use the command.
|
||
|
|
Some of these changes are made to the command definition statements source,
|
||
|
|
which requires the command to be recreated. Other changes can be made with
|
||
|
|
the Change Command (CHGCMD) command. <ul><li>Add an optional parameter in any position. Adding an optional parameter
|
||
|
|
before the positional limit may affect any procedures, programs, and batch
|
||
|
|
input streams that have the parameters specified in positional form.</li>
|
||
|
|
<li>Change the REL and RANGE checks to be less restrictive.</li>
|
||
|
|
<li>Add new special values. However, this could change the action of the
|
||
|
|
procedure or program if the value could be specified before the change.</li>
|
||
|
|
<li>Change the order of the parameters. However, changing the order of the
|
||
|
|
parameters that precede the positional limit <em>will</em> affect any procedures,
|
||
|
|
programs, and batch input streams that have the parameters specified in positional
|
||
|
|
form.</li>
|
||
|
|
<li>Increase the number of optional elements in a simple list.</li>
|
||
|
|
<li>Change default values. However, this may affect the operation of the
|
||
|
|
procedure or program.</li>
|
||
|
|
<li>Decrease the number of required list items in a simple list.</li>
|
||
|
|
<li>Change a parameter from required to optional.</li>
|
||
|
|
<li>Change RSTD from *YES to *NO.</li>
|
||
|
|
<li>Increase the length when FULL(*NO) is specified.</li>
|
||
|
|
<li>Change FULL from *YES to *NO.</li>
|
||
|
|
<li>Change the PROMPT text.</li>
|
||
|
|
<li>Change the ALLOW value to be less restrictive.</li>
|
||
|
|
<li>Change the name of the command processing program if the new command processing
|
||
|
|
program accepts the correct number and type of parameters.</li>
|
||
|
|
<li>Change the name of the validity checking program if the new validity checking
|
||
|
|
program accepts the correct number and type of parameters.</li>
|
||
|
|
<li>Change the mode in which the command can be run as long as the new mode
|
||
|
|
does not affect the old mode of the same command that is used in a CL procedure
|
||
|
|
or program.</li>
|
||
|
|
<li>Change the TYPE to a compatible and less restrictive value. For example,
|
||
|
|
change the TYPE from *NAME to *CHAR.</li>
|
||
|
|
<li>Change the MAX value to greater than 1.</li>
|
||
|
|
<li>Change the PASSATR and VARY values.</li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
<p>The following changes can be made to the command definition statements
|
||
|
|
depending on what was specified in the CL procedure or program in which the
|
||
|
|
command is used: </p>
|
||
|
|
<ul><li>Remove a parameter.</li>
|
||
|
|
<li>Change the RANGE and REL values to be more restrictive.</li>
|
||
|
|
<li>Remove special values.</li>
|
||
|
|
<li>Decrease the number of elements allowed in a list.</li>
|
||
|
|
<li>Change the TYPE value to be more restrictive or incompatible with the
|
||
|
|
original TYPE value. For example, change the TYPE value from *CHAR to *NAME
|
||
|
|
or change *PNAME to *CHAR.</li>
|
||
|
|
<li>Add a SNGVAL parameter that was previously a list item.</li>
|
||
|
|
<li>Change the name of an optional parameter.</li>
|
||
|
|
<li>Remove a value from a list of values.</li>
|
||
|
|
<li>Increase the number of required list items.</li>
|
||
|
|
<li>Change a SNGVAL parameter to a SPCVAL parameter.</li>
|
||
|
|
<li>Change a simple list to a mixed list of like elements.</li>
|
||
|
|
<li>Change an optional parameter to a constant.</li>
|
||
|
|
<li>Change RTNVAL from *YES to *NO, or from *NO to *YES.</li>
|
||
|
|
<li>Change case value from *MIXED to *MONO.</li>
|
||
|
|
</ul>
|
||
|
|
<p>The following changes can be made to the command definition statements,
|
||
|
|
but may cause the procedure or program that uses the command to function differently:
|
||
|
|
</p>
|
||
|
|
<ul><li>Change the meaning of a value.</li>
|
||
|
|
<li>Change the default value.</li>
|
||
|
|
<li>Change a SNGVAL parameter to a SPCVAL parameter.</li>
|
||
|
|
<li>Change a value to a SNGVAL parameter.</li>
|
||
|
|
<li>Change a list to a list within a list.</li>
|
||
|
|
<li>Change case value from *MIXED to *MONO.</li>
|
||
|
|
</ul>
|
||
|
|
<p>The following changes to the command definition statements require that
|
||
|
|
the procedures or program using the command be recreated. </p>
|
||
|
|
<ul><li>Addition of a new required parameter.</li>
|
||
|
|
<li>Removal of a required parameter.</li>
|
||
|
|
<li>Changing the name of a required parameter.</li>
|
||
|
|
<li>Changing a required parameter to a constant.</li>
|
||
|
|
<li>Changing the command processing program to or from *REXX</li>
|
||
|
|
</ul>
|
||
|
|
<p>In addition, if you specify *LIBL as the qualifier on the name of the command
|
||
|
|
processing program or the validity checking when the command is created or
|
||
|
|
changed, you can move the command processing program or the validity checking
|
||
|
|
to another library in the library list without changing the command definition
|
||
|
|
statements.</p>
|
||
|
|
</div>
|
||
|
|
<div>
|
||
|
|
<ul class="ullinks">
|
||
|
|
<li class="ulchildlink"><strong><a href="chgcmddef.htm">Change command defaults</a></strong><br />
|
||
|
|
You can change the default value of a command keyword by using
|
||
|
|
the <span class="cmdname">Change Command Default (CHGCMDDFT)</span> command. </li>
|
||
|
|
<li class="ulchildlink"><strong><a href="chgcmddefex.htm">Examples: Change command defaults</a></strong><br />
|
||
|
|
These provide examples of changing default values for commands.</li>
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
<div class="familylinks">
|
||
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="defcm.htm" title="This describes how you can define and create your own commands.">Define commands</a></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|