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| <div class="navpath"><b>tmudr</b>::<a class="el" href="classtmudr_1_1ComparisonPredicateInfo.html">ComparisonPredicateInfo</a> |
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| <h1>tmudr::ComparisonPredicateInfo Class Reference</h1><!-- doxytag: class="tmudr::ComparisonPredicateInfo" --><!-- doxytag: inherits="tmudr::PredicateInfo" --> |
| <p>A comparison predicate to be evaluated on a table. |
| <a href="#_details">More...</a></p> |
| |
| <p><code>#include <<a class="el" href="sqludr_8h_source.html">sqludr.h</a>></code></p> |
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| Inheritance diagram for tmudr::ComparisonPredicateInfo:</div> |
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| <table border="0" cellpadding="0" cellspacing="0"> |
| <tr><td colspan="2"><h2>Public Member Functions</h2></td></tr> |
| <tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classtmudr_1_1ComparisonPredicateInfo.html#ac25f0e26029a86b884c719d571ec8b1e">getColumnNumber</a> () const </td></tr> |
| <tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classtmudr_1_1ComparisonPredicateInfo.html#a79b249f4d7719b7fb2348c50b5dd3f33">hasAConstantValue</a> () const </td></tr> |
| <tr><td class="memItemLeft" align="right" valign="top">std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classtmudr_1_1ComparisonPredicateInfo.html#a4f49fa3520e789ba5f14e722ba1caec7">getConstValue</a> () const </td></tr> |
| </table> |
| <hr/><a name="_details"></a><h2>Detailed Description</h2> |
| <p>A comparison predicate to be evaluated on a table. </p> |
| <p>A predicate that compares a column value to a constant or another value that evaluates to a constant at runtime, like an SQL query parameter. </p> |
| <hr/><h2>Member Function Documentation</h2> |
| <a class="anchor" id="ac25f0e26029a86b884c719d571ec8b1e"></a><!-- doxytag: member="tmudr::ComparisonPredicateInfo::getColumnNumber" ref="ac25f0e26029a86b884c719d571ec8b1e" args="() const " --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
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| <td class="memname">int ComparisonPredicateInfo::getColumnNumber </td> |
| <td>(</td> |
| <td class="paramname"></td> |
| <td> ) </td> |
| <td> const</td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| <p>Get the column number of the column in this comparison predicate.</p> |
| <dl class="return"><dt><b>Returns:</b></dt><dd>Column number. </dd></dl> |
| |
| </div> |
| </div> |
| <a class="anchor" id="a4f49fa3520e789ba5f14e722ba1caec7"></a><!-- doxytag: member="tmudr::ComparisonPredicateInfo::getConstValue" ref="a4f49fa3520e789ba5f14e722ba1caec7" args="() const " --> |
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| <td class="memname">std::string ComparisonPredicateInfo::getConstValue </td> |
| <td>(</td> |
| <td class="paramname"></td> |
| <td> ) </td> |
| <td> const</td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| <p>Return the value, as a string, of the constant in this predicate.</p> |
| <p>This returns the value, using SQL syntax, of the constant involved in the comparison predicate. It throws an exception if method <a class="el" href="classtmudr_1_1ComparisonPredicateInfo.html#a79b249f4d7719b7fb2348c50b5dd3f33">hasAConstantValue()</a> would return false.</p> |
| <dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classtmudr_1_1ComparisonPredicateInfo.html#a79b249f4d7719b7fb2348c50b5dd3f33">hasAConstantValue()</a></dd></dl> |
| <dl class="return"><dt><b>Returns:</b></dt><dd>Value of the constant in this comparison predicate. </dd></dl> |
| <dl><dt><b>Exceptions:</b></dt><dd> |
| <table border="0" cellspacing="2" cellpadding="0"> |
| <tr><td valign="top"></td><td valign="top"><em><a class="el" href="classtmudr_1_1UDRException.html" title="This is the exception to throw when an error occurs in a UDR.">UDRException</a></em> </td><td></td></tr> |
| </table> |
| </dd> |
| </dl> |
| |
| </div> |
| </div> |
| <a class="anchor" id="a79b249f4d7719b7fb2348c50b5dd3f33"></a><!-- doxytag: member="tmudr::ComparisonPredicateInfo::hasAConstantValue" ref="a79b249f4d7719b7fb2348c50b5dd3f33" args="() const " --> |
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| <td class="memname">bool ComparisonPredicateInfo::hasAConstantValue </td> |
| <td>(</td> |
| <td class="paramname"></td> |
| <td> ) </td> |
| <td> const</td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| <p>Return whether this comparison value involves a constant.</p> |
| <p>The method returns whether the comparison predicate is of the form "column" "op" "constant". If it returns false, the predicate compares the column with a parameter or some other value not available to the <a class="el" href="classtmudr_1_1UDR.html" title="This class represents the code associated with a UDR.">UDR</a>. Predicates that do not involve a constant cannot be evaluated in the <a class="el" href="classtmudr_1_1UDR.html" title="This class represents the code associated with a UDR.">UDR</a> itself, since the comparison value is not available to the <a class="el" href="classtmudr_1_1UDR.html" title="This class represents the code associated with a UDR.">UDR</a>. They can be evaluated on a table-valued input, however.</p> |
| <dl class="return"><dt><b>Returns:</b></dt><dd>true if the comparison is with a constant, false otherwise </dd></dl> |
| |
| </div> |
| </div> |
| <hr/>The documentation for this class was generated from the following files:<ul> |
| <li><a class="el" href="sqludr_8h_source.html">sqludr.h</a></li> |
| <li>sqludr.cpp</li> |
| </ul> |
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