84 lines
5.5 KiB
HTML
84 lines
5.5 KiB
HTML
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<meta name="abstract" content="At the select/omit-field level, you can specify a field name, a value, or *NULL for the parameter." />
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<title>Specify COMP at the select- or omit-field level</title>
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<body id="compselom"><a name="compselom"><!-- --></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">Specify COMP at the select- or omit-field level</h1>
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<div><p>At the select/omit-field level, you can specify a field name, a
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value, or *NULL for the parameter.</p>
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<p>If the select/omit field is a binary character field, the field-name parameter
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must also be a binary character field. The comparisons for binary character
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select/omit fields also need to take the actual lengths of the operands into
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consideration. The operands will only compare as equal if the actual lengths
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of the operands are equal. Shorter operands will be considered less than the
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longer operands when they are equal up to the length of the shorter operand.</p>
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<div class="p">If you specify a value, the following rules apply: <ul><li>If you are defining a character field, specify a character constant or
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a hexadecimal character string. <p>Specify character strings with single
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quotation marks (see Example 1 in the <a href="rzakbmstlcomp.htm">COMP (Comparison) keyword for physical and logical files</a> topic).</p>
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<p>Specify hexadecimal character strings as an X followed by
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a combination of the digits 0 through 9 and the letters A through F, enclosed
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in single quotation marks ('). The number of hexadecimal digits in single
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quotation marks must be exactly twice the specified length of the field (see
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Example 2 in the <a href="rzakbmstlcomp.htm">COMP (Comparison) keyword for physical and logical files</a> topic).</p>
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</li>
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<li>If you are defining a numeric field, specify a numeric string (digits
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0 through 9 specified without single quotation marks) as shown in example
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2.</li>
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<li>If you are defining a date field, specify a valid date in the same format
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specified on the DATFMT keyword and use the same separator as specified on
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the DATSEP keyword.<p>For example, <samp class="codeph">COMP(EQ '12/15/91')</samp> is
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the default value if *MDY is specified for DATFMT and '/' is specified for
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DATSEP.</p>
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</li>
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<li>If you are defining a time field, specify a valid time in the same format
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specified on the TIMFMT keyword and use the same separator as specified on
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the TIMSEP keyword.<p>For example, <samp class="codeph">COMP(EQ '11.00.00')</samp> is
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the default value if *ISO is specified for TIMFMT. The default separator for
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*ISO is a period (.).</p>
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</li>
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<li>If you are defining a timestamp field, you must specify the default value
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in the following format: <pre>COMP(EQ 'YYYY-MM-DD-HH.MM.SS.UUUUUU')</pre>
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</li>
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</ul>
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</div>
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<p>If you specify *NULL, the relational operator must be EQ or NE.</p>
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<p>COMP selects or omits records retrieved from the physical file on which
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this logical file is based when your program sends an input operation to the
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record format you are defining. The operating system selects or omits records
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as a result of testing the value of the select/omit fields against the value
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you specify, the value of the field whose name you specify, or the null value
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(if *NULL was specified).</p>
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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="rzakbmstlcomp.htm" title="Use this field-level keyword to specify validity checking for the field you are defining when it is referred to later during display file creation. For logical files, you can also specify this keyword at the select/omit-field level. COMP is equivalent to CMP.">COMP (Comparison) keyword for physical and logical files</a></div>
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</div>
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</div>
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</body>
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