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<div class="subTitle">org.apache.hawq.pxf.plugins.hive</div>
<h2 title="Class HiveAccessor" class="title">Class HiveAccessor</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li><a href="../../../../../../org/apache/hawq/pxf/api/utilities/Plugin.html" title="class in org.apache.hawq.pxf.api.utilities">org.apache.hawq.pxf.api.utilities.Plugin</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html" title="class in org.apache.hawq.pxf.plugins.hdfs">org.apache.hawq.pxf.plugins.hdfs.HdfsSplittableDataAccessor</a></li>
<li>
<ul class="inheritance">
<li>org.apache.hawq.pxf.plugins.hive.HiveAccessor</li>
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</li>
</ul>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../../org/apache/hawq/pxf/api/ReadAccessor.html" title="interface in org.apache.hawq.pxf.api">ReadAccessor</a></dd>
</dl>
<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../../org/apache/hawq/pxf/plugins/hive/HiveLineBreakAccessor.html" title="class in org.apache.hawq.pxf.plugins.hive">HiveLineBreakAccessor</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hive/HiveRCFileAccessor.html" title="class in org.apache.hawq.pxf.plugins.hive">HiveRCFileAccessor</a></dd>
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<pre>public class <span class="typeNameLabel">HiveAccessor</span>
extends <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html" title="class in org.apache.hawq.pxf.plugins.hdfs">HdfsSplittableDataAccessor</a></pre>
<div class="block">Accessor for Hive tables. The accessor will open and read a split belonging
to a Hive table. Opening a split means creating the corresponding InputFormat
and RecordReader required to access the split's data. The actual record
reading is done in the base class -
<a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html" title="class in org.apache.hawq.pxf.plugins.hdfs"><code>HdfsSplittableDataAccessor</code></a>. <br>
HiveAccessor will also enforce Hive partition filtering by filtering-out a
split which does not belong to a partition filter. Naturally, the partition
filtering will be done only for Hive tables that are partitioned.</div>
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<h3>Field Summary</h3>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>protected java.lang.Boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hawq/pxf/plugins/hive/HiveAccessor.html#filterInFragmenter">filterInFragmenter</a></span></code>&nbsp;</td>
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<h3>Fields inherited from class&nbsp;org.apache.hawq.pxf.plugins.hdfs.<a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html" title="class in org.apache.hawq.pxf.plugins.hdfs">HdfsSplittableDataAccessor</a></h3>
<code><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#conf">conf</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#data">data</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#inputFormat">inputFormat</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#iter">iter</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#jobConf">jobConf</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#key">key</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#reader">reader</a></code></li>
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<code><a href="../../../../../../org/apache/hawq/pxf/api/utilities/Plugin.html#inputData">inputData</a></code></li>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hawq/pxf/plugins/hive/HiveAccessor.html#HiveAccessor-org.apache.hawq.pxf.api.utilities.InputData-">HiveAccessor</a></span>(<a href="../../../../../../org/apache/hawq/pxf/api/utilities/InputData.html" title="class in org.apache.hawq.pxf.api.utilities">InputData</a>&nbsp;input)</code>
<div class="block">Constructs a HiveAccessor and creates an InputFormat (derived from
<code>InputFormat</code>) and the Hive partition
fields</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hawq/pxf/plugins/hive/HiveAccessor.html#HiveAccessor-org.apache.hawq.pxf.api.utilities.InputData-org.apache.hadoop.mapred.InputFormat-">HiveAccessor</a></span>(<a href="../../../../../../org/apache/hawq/pxf/api/utilities/InputData.html" title="class in org.apache.hawq.pxf.api.utilities">InputData</a>&nbsp;input,
org.apache.hadoop.mapred.InputFormat&lt;?,?&gt;&nbsp;inputFormat)</code>
<div class="block">Constructs a HiveAccessor</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>protected java.lang.Object</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hawq/pxf/plugins/hive/HiveAccessor.html#getReader-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.InputSplit-">getReader</a></span>(org.apache.hadoop.mapred.JobConf&nbsp;jobConf,
org.apache.hadoop.mapred.InputSplit&nbsp;split)</code>
<div class="block">Creates the RecordReader suitable for this given split.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hawq/pxf/plugins/hive/HiveAccessor.html#openForRead--">openForRead</a></span>()</code>
<div class="block">Opens Hive data split for read.</div>
</td>
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<h3>Methods inherited from class&nbsp;org.apache.hawq.pxf.plugins.hdfs.<a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html" title="class in org.apache.hawq.pxf.plugins.hdfs">HdfsSplittableDataAccessor</a></h3>
<code><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#closeForRead--">closeForRead</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#getNextSplit--">getNextSplit</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#isThreadSafe--">isThreadSafe</a>, <a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#readNextObject--">readNextObject</a></code></li>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>filterInFragmenter</h4>
<pre>protected&nbsp;java.lang.Boolean filterInFragmenter</pre>
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<h4>HiveAccessor</h4>
<pre>public&nbsp;HiveAccessor(<a href="../../../../../../org/apache/hawq/pxf/api/utilities/InputData.html" title="class in org.apache.hawq.pxf.api.utilities">InputData</a>&nbsp;input)
throws java.lang.Exception</pre>
<div class="block">Constructs a HiveAccessor and creates an InputFormat (derived from
<code>InputFormat</code>) and the Hive partition
fields</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>input</code> - contains the InputFormat class name and the partition fields</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.Exception</code> - if failed to create input format</dd>
</dl>
</li>
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<h4>HiveAccessor</h4>
<pre>public&nbsp;HiveAccessor(<a href="../../../../../../org/apache/hawq/pxf/api/utilities/InputData.html" title="class in org.apache.hawq.pxf.api.utilities">InputData</a>&nbsp;input,
org.apache.hadoop.mapred.InputFormat&lt;?,?&gt;&nbsp;inputFormat)</pre>
<div class="block">Constructs a HiveAccessor</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>input</code> - contains the InputFormat class name and the partition fields</dd>
<dd><code>inputFormat</code> - Hive InputFormat</dd>
</dl>
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<h4>openForRead</h4>
<pre>public&nbsp;boolean&nbsp;openForRead()
throws java.lang.Exception</pre>
<div class="block">Opens Hive data split for read. Enables Hive partition filtering. <br></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hawq/pxf/api/ReadAccessor.html#openForRead--">openForRead</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hawq/pxf/api/ReadAccessor.html" title="interface in org.apache.hawq.pxf.api">ReadAccessor</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#openForRead--">openForRead</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html" title="class in org.apache.hawq.pxf.plugins.hdfs">HdfsSplittableDataAccessor</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if there are no partitions or there is no partition filter
or partition filter is set and the file currently opened by the
accessor belongs to the partition.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.Exception</code> - if filter could not be built, connection to Hive failed
or resource failed to open</dd>
</dl>
</li>
</ul>
<a name="getReader-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.InputSplit-">
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<h4>getReader</h4>
<pre>protected&nbsp;java.lang.Object&nbsp;getReader(org.apache.hadoop.mapred.JobConf&nbsp;jobConf,
org.apache.hadoop.mapred.InputSplit&nbsp;split)
throws java.io.IOException</pre>
<div class="block">Creates the RecordReader suitable for this given split.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html#getReader-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.InputSplit-">getReader</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hawq/pxf/plugins/hdfs/HdfsSplittableDataAccessor.html" title="class in org.apache.hawq.pxf.plugins.hdfs">HdfsSplittableDataAccessor</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>jobConf</code> - configuration data for the Hadoop framework</dd>
<dd><code>split</code> - the split that was allocated for reading to this accessor</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>record reader</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.io.IOException</code> - if failed to create record reader</dd>
</dl>
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