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| <h2 title="Interface RowKeyPrefix" class="title">Interface RowKeyPrefix<R></h2> |
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| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>R</code> - indicating the type of rowkey that a particular implementation is |
| a prefix for.</dd> |
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| <dt>All Known Implementing Classes:</dt> |
| <dd><a href="../../../../../../../../org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationRowKeyPrefix.html" title="class in org.apache.hadoop.yarn.server.timelineservice.storage.application">ApplicationRowKeyPrefix</a>, <a href="../../../../../../../../org/apache/hadoop/yarn/server/timelineservice/storage/entity/EntityRowKeyPrefix.html" title="class in org.apache.hadoop.yarn.server.timelineservice.storage.entity">EntityRowKeyPrefix</a>, <a href="../../../../../../../../org/apache/hadoop/yarn/server/timelineservice/storage/flow/FlowActivityRowKeyPrefix.html" title="class in org.apache.hadoop.yarn.server.timelineservice.storage.flow">FlowActivityRowKeyPrefix</a>, <a href="../../../../../../../../org/apache/hadoop/yarn/server/timelineservice/storage/flow/FlowRunRowKeyPrefix.html" title="class in org.apache.hadoop.yarn.server.timelineservice.storage.flow">FlowRunRowKeyPrefix</a>, <a href="../../../../../../../../org/apache/hadoop/yarn/server/timelineservice/storage/subapplication/SubApplicationRowKeyPrefix.html" title="class in org.apache.hadoop.yarn.server.timelineservice.storage.subapplication">SubApplicationRowKeyPrefix</a></dd> |
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| <pre>public interface <span class="typeNameLabel">RowKeyPrefix<R></span></pre> |
| <div class="block">In queries where a single result is needed, an exact rowkey can be used |
| through the corresponding rowkey#getRowKey() method. For queries that need to |
| scan over a range of rowkeys, a partial (the initial part) of rowkeys are |
| used. Classes implementing RowKeyPrefix indicate that they are the initial |
| part of rowkeys, with different constructors with fewer number of argument to |
| form a partial rowkey, a prefix.</div> |
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| <td class="colFirst"><code>byte[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/timelineservice/storage/common/RowKeyPrefix.html#getRowKeyPrefix--">getRowKeyPrefix</a></span>()</code> |
| <div class="block">Create a row key prefix, meaning a partial rowkey that can be used in range |
| scans.</div> |
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| <h4>getRowKeyPrefix</h4> |
| <pre>byte[] getRowKeyPrefix()</pre> |
| <div class="block">Create a row key prefix, meaning a partial rowkey that can be used in range |
| scans. Which fields are included in the prefix will depend on the |
| constructor of the specific instance that was used. Output depends on which |
| constructor was used.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a prefix of the following form <code>fist!second!...!last!</code></dd> |
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