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| <h1 title="Package" class="title">Package org.apache.drill.common</h1> |
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| <div class="block">Logical (execution-engine-independent) element definitions.</div> |
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| <div class="block">A class similar to Pointer<>, but with features unique to holding |
| AutoCloseable pointers.</div> |
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| <div class="block">Collects one or more exceptions that may occur, using |
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| suppressed exceptions</a>.</div> |
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| <div class="block">Provides functionality comparable to Guava's Closeables for AutoCloseables.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/drill/common/EventProcessor.html" title="class in org.apache.drill.common">EventProcessor</a><T></td> |
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| <div class="block">Process events serially.<br> |
| <br> |
| Our use of listeners that deliver events directly can sometimes |
| cause problems when events are delivered recursively in the middle of |
| event handling by the same object.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/drill/common/HistoricalLog.html" title="class in org.apache.drill.common">HistoricalLog</a></td> |
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| <div class="block">Utility class that can be used to log activity within a class |
| for later logging and debugging.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/drill/common/PlanStringBuilder.html" title="class in org.apache.drill.common">PlanStringBuilder</a></td> |
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| <div class="block">Builds a string in Drill's "plan string" format: that shown in the |
| text version of <code>EXPLAIN PLAN FOR</code> output.</div> |
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| <div class="block">A wrapper for Runnables that provides a hook to do cleanup.</div> |
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| <td class="colFirst"><a href="../../../../org/apache/drill/common/SerializedExecutor.html" title="class in org.apache.drill.common">SerializedExecutor</a></td> |
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| <div class="block">Serializes execution of multiple submissions to a single target, while still |
| using a thread pool to execute those submissions.</div> |
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| <div class="block">Convenient way of obtaining and manipulating stack traces for debugging.</div> |
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| <div class="block">Encapsulates version information and provides ordering</div> |
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| <h2 title="Package org.apache.drill.common Description">Package org.apache.drill.common Description</h2> |
| <div class="block">Logical (execution-engine-independent) element definitions. |
| |
| Drill has several representations of a query including SQL, logical plans and |
| physical plans. All of the logical constructs of Drill are separated from |
| their physical implementations in the Java execution engine. The components |
| of this package can be used to share common logical constructs between the |
| current engine and any other future alternative physical implementations of |
| the same logical constructs. This is the same for the logical expression |
| constructs defined within this package.</div> |
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