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| <h2 title="Class InvalidRelException" class="title">Class InvalidRelException</h2> |
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| <li>org.apache.calcite.rel.InvalidRelException</li> |
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| <pre>public class <span class="typeNameLabel">InvalidRelException</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre> |
| <div class="block">Exception that indicates that a relational expression would be invalid |
| with given parameters. |
| |
| <p>This exception is thrown by the constructor of a subclass of |
| <a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel"><code>RelNode</code></a> when given parameters it cannot accept. For example, |
| <code>EnumerableJoinRel</code> can only implement equi-joins, so its constructor |
| throws <code>InvalidRelException</code> when given the condition |
| <code>input0.x - input1.y = 2</code>.</p> |
| |
| <p>Because the exception is checked (i.e. extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang"><code>Exception</code></a> but not |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/RuntimeException.html?is-external=true" title="class or interface in java.lang"><code>RuntimeException</code></a>), constructors that throw this exception will |
| declare this exception in their <code>throws</code> clause, and rules that create |
| those relational expressions will need to handle it. Usually a rule will |
| not take the exception personally, and will fail to match. The burden of |
| checking is removed from the rule, which means less code for the author of |
| the rule to maintain.</p> |
| |
| <p>The caller that receives an <code>InvalidRelException</code> (typically a rule |
| attempting to create a relational expression) should log it at |
| the DEBUG level.</p></div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../serialized-form.html#org.apache.calcite.rel.InvalidRelException">Serialized Form</a></dd> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rel/InvalidRelException.html#InvalidRelException-java.lang.String-">InvalidRelException</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> message)</code> |
| <div class="block">Creates an InvalidRelException.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rel/InvalidRelException.html#InvalidRelException-java.lang.String-java.lang.Throwable-">InvalidRelException</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> message, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a> cause)</code> |
| <div class="block">Creates an InvalidRelException with a cause.</div> |
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| <h4>InvalidRelException</h4> |
| <pre>public InvalidRelException(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> message)</pre> |
| <div class="block">Creates an InvalidRelException.</div> |
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| <h4>InvalidRelException</h4> |
| <pre>public InvalidRelException(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> message, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a> cause)</pre> |
| <div class="block">Creates an InvalidRelException with a cause.</div> |
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