72 lines
4.1 KiB
HTML
72 lines
4.1 KiB
HTML
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<meta name="DC.Title" content="Relational expressions" />
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<meta name="abstract" content="The operands in a relational expression can be arithmetic or character string expressions; they can also be logical constants and logical variables." />
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<meta name="description" content="The operands in a relational expression can be arithmetic or character string expressions; they can also be logical constants and logical variables." />
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<title>Relational expressions</title>
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<body id="rbam6relatexp"><a name="rbam6relatexp"><!-- --></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">Relational expressions</h1>
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<div><p>The operands in a relational expression can be arithmetic or character
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string expressions; they can also be logical constants and logical variables.</p>
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<div class="section"><p>Only two operands can be used with each relational
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operator. The data type (arithmetic, character string, or logical) must be
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the same for the pair of operands. The result of a relational expression is
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a logical value '0' or '1'.</p>
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<p>Refer to the table in <a href="rbam6opsinexp.htm">Operators
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in expressions</a> for the meanings of the relational operators, which
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can be specified by symbols (=, >, <, >=, <=, <img src="notsym.gif" alt="not symbol" />=, <img src="notsym.gif" alt="not symbol" />>,
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<img src="notsym.gif" alt="not symbol" /><) or their reserved
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values (*EQ, *GT, *LT, *GE, *LE, *NE, *NG, *NL).</p>
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<p>If an operation involves
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character fields of unequal length, the shorter field is extended by blanks
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added to the right.</p>
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<p>Arithmetic fields are compared algebraically; character
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fields are compared according to the EBCDIC collating sequence.</p>
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<p>When
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logical fields are compared, a logical one ('1') is greater than logical zero
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('0'). Symbolically, this is ('1' > '0').</p>
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<p>The following
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are examples of relational expressions:</p>
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<pre>(&X *GT 25)
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(&X > 25)
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(&X>25)
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(&NAME *EQ GSD)
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(&NAME *EQ &GSD)
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(&NAME *EQ 'GSD')
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(&BLANK *EQ ' ')</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="rbam6xpressincom.htm" title="A character string expression can be used for any parameter, element, or qualifier defined with EXPR(*YES) in the command definition object.">Expressions in CL commands</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="rbam6opsinexp.htm" title="Operators are used in expressions to indicate an action to be performed on the operands in the expression or the relationship between the operands.">Operators in expressions</a></div>
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</div>
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</div>
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</body>
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