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| <h2 title="Interface RecordReader" class="title">Interface RecordReader</h2> |
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| <pre>public interface <span class="typeNameLabel">RecordReader</span> |
| extends <a href="http://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></pre> |
| <div class="block">A row-by-row iterator for ORC files.</div> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/RecordReader.html#close--">close</a></span>()</code> |
| <div class="block">Release the resources associated with the given reader.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>float</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/RecordReader.html#getProgress--">getProgress</a></span>()</code> |
| <div class="block">Get the progress of the reader through the rows.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/RecordReader.html#getRowNumber--">getRowNumber</a></span>()</code> |
| <div class="block">Get the row number of the row that will be returned by the following |
| call to next().</div> |
| </td> |
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| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/RecordReader.html#nextBatch-org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatch-">nextBatch</a></span>(<a href="http://orc.apache.org/api/hive-storage-api/org/apache/hadoop/hive/ql/exec/vector/VectorizedRowBatch.html?is-external=true" title="class or interface in org.apache.hadoop.hive.ql.exec.vector">VectorizedRowBatch</a> batch)</code> |
| <div class="block">Read the next row batch.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/RecordReader.html#seekToRow-long-">seekToRow</a></span>(long rowCount)</code> |
| <div class="block">Seek to a particular row number.</div> |
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| <h4>nextBatch</h4> |
| <pre>boolean nextBatch(<a href="http://orc.apache.org/api/hive-storage-api/org/apache/hadoop/hive/ql/exec/vector/VectorizedRowBatch.html?is-external=true" title="class or interface in org.apache.hadoop.hive.ql.exec.vector">VectorizedRowBatch</a> batch) |
| throws <a href="http://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Read the next row batch. The size of the batch to read cannot be |
| controlled by the callers. Caller need to look at |
| VectorizedRowBatch.size of the retunred object to know the batch |
| size read.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>batch</code> - a row batch object to read into</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>were more rows available to read?</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
| </dl> |
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| <h4>getRowNumber</h4> |
| <pre>long getRowNumber() |
| throws <a href="http://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Get the row number of the row that will be returned by the following |
| call to next().</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the row number from 0 to the number of rows in the file</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
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| <h4>getProgress</h4> |
| <pre>float getProgress() |
| throws <a href="http://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Get the progress of the reader through the rows.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a fraction between 0.0 and 1.0 of rows read</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
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| <h4>close</h4> |
| <pre>void close() |
| throws <a href="http://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Release the resources associated with the given reader.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true#close--" title="class or interface in java.lang">close</a></code> in interface <code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true#close--" title="class or interface in java.io">close</a></code> in interface <code><a href="http://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></code></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
| </dl> |
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| <h4>seekToRow</h4> |
| <pre>void seekToRow(long rowCount) |
| throws <a href="http://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Seek to a particular row number.</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
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