site/api/orc-core/org/apache/orc/Writer.html - orc - Git at Google

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 <div class="subTitle">org.apache.orc</div>
 <h2 title="Interface Writer" class="title">Interface Writer</h2>
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 <dt>All Superinterfaces:</dt>
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 </dl>
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 <dt>All Known Subinterfaces:</dt>
 <dd><a href="../../../org/apache/orc/impl/WriterInternal.html" title="interface in org.apache.orc.impl">WriterInternal</a></dd>
 </dl>
 <dl>
 <dt>All Known Implementing Classes:</dt>
 <dd><a href="../../../org/apache/orc/impl/WriterImpl.html" title="class in org.apache.orc.impl">WriterImpl</a>, <a href="../../../org/apache/orc/impl/writer/WriterImplV2.html" title="class in org.apache.orc.impl.writer">WriterImplV2</a></dd>
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 <hr>
 <br>
 <pre>public interface <span class="typeNameLabel">Writer</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">The interface for writing ORC files.</div>
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 <!-- ========== METHOD SUMMARY =========== -->
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 <h3>Method Summary</h3>
 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
 <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Method and Description</th>
 </tr>
 <tr id="i0" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/Writer.html#addRowBatch-org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatch-">addRowBatch</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>&nbsp;batch)</code>
 <div class="block">Add a row batch to the ORC file.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/Writer.html#addUserMetadata-java.lang.String-java.nio.ByteBuffer-">addUserMetadata</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key,
                <a href="http://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a>&nbsp;value)</code>
 <div class="block">Add arbitrary meta-data to the ORC file.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/Writer.html#appendStripe-byte:A-int-int-org.apache.orc.StripeInformation-org.apache.orc.OrcProto.StripeStatistics-">appendStripe</a></span>(byte[]&nbsp;stripe,
             int&nbsp;offset,
             int&nbsp;length,
             <a href="../../../org/apache/orc/StripeInformation.html" title="interface in org.apache.orc">StripeInformation</a>&nbsp;stripeInfo,
             <a href="http://orc.apache.org/api/orc-core/org/apache/orc/OrcProto.StripeStatistics.html?is-external=true" title="class or interface in org.apache.orc">OrcProto.StripeStatistics</a>&nbsp;stripeStatistics)</code>
 <div class="block">Fast stripe append to ORC file.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/Writer.html#appendStripe-byte:A-int-int-org.apache.orc.StripeInformation-org.apache.orc.StripeStatistics:A-">appendStripe</a></span>(byte[]&nbsp;stripe,
             int&nbsp;offset,
             int&nbsp;length,
             <a href="../../../org/apache/orc/StripeInformation.html" title="interface in org.apache.orc">StripeInformation</a>&nbsp;stripeInfo,
             <a href="../../../org/apache/orc/StripeStatistics.html" title="class in org.apache.orc">StripeStatistics</a>[]&nbsp;stripeStatistics)</code>
 <div class="block">Fast stripe append to ORC file.</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/Writer.html#appendUserMetadata-java.util.List-">appendUserMetadata</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="http://orc.apache.org/api/orc-core/org/apache/orc/OrcProto.UserMetadataItem.html?is-external=true" title="class or interface in org.apache.orc">OrcProto.UserMetadataItem</a>&gt;&nbsp;userMetadata)</code>
 <div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;
 <div class="block"><span class="deprecationComment">use <a href="../../../org/apache/orc/Writer.html#addUserMetadata-java.lang.String-java.nio.ByteBuffer-"><code>addUserMetadata(String, ByteBuffer)</code></a> instead</span></div>
 </div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/Writer.html#close--">close</a></span>()</code>
 <div class="block">Flush all of the buffers and close the file.</div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/Writer.html#getNumberOfRows--">getNumberOfRows</a></span>()</code>
 <div class="block">Return the number of rows in file.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/Writer.html#getRawDataSize--">getRawDataSize</a></span>()</code>
 <div class="block">Return the deserialized data size.</div>
 </td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code><a href="../../../org/apache/orc/TypeDescription.html" title="class in org.apache.orc">TypeDescription</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/Writer.html#getSchema--">getSchema</a></span>()</code>
 <div class="block">Get the schema for this writer</div>
 </td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code><a href="../../../org/apache/orc/ColumnStatistics.html" title="interface in org.apache.orc">ColumnStatistics</a>[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/Writer.html#getStatistics--">getStatistics</a></span>()</code>
 <div class="block">Get the statistics about the columns in the file.</div>
 </td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/orc/Writer.html#writeIntermediateFooter--">writeIntermediateFooter</a></span>()</code>
 <div class="block">Write an intermediate footer on the file such that if the file is
  truncated to the returned offset, it would be a valid ORC file.</div>
 </td>
 </tr>
 </table>
 </li>
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 <h3>Method Detail</h3>
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 <h4>getSchema</h4>
 <pre><a href="../../../org/apache/orc/TypeDescription.html" title="class in org.apache.orc">TypeDescription</a>&nbsp;getSchema()</pre>
 <div class="block">Get the schema for this writer</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the file schema</dd>
 </dl>
 </li>
 </ul>
 <a name="addUserMetadata-java.lang.String-java.nio.ByteBuffer-">
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 <h4>addUserMetadata</h4>
 <pre>void&nbsp;addUserMetadata(<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key,
                      <a href="http://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a>&nbsp;value)</pre>
 <div class="block">Add arbitrary meta-data to the ORC file. This may be called at any point
  until the Writer is closed. If the same key is passed a second time, the
  second value will replace the first.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - a key to label the data with.</dd>
 <dd><code>value</code> - the contents of the metadata.</dd>
 </dl>
 </li>
 </ul>
 <a name="addRowBatch-org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatch-">
 <!--   -->
 </a>
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 <h4>addRowBatch</h4>
 <pre>void&nbsp;addRowBatch(<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>&nbsp;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">Add a row batch to the ORC file.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>batch</code> - the rows to add</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>
 </li>
 </ul>
 <a name="close--">
 <!--   -->
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 <ul class="blockList">
 <li class="blockList">
 <h4>close</h4>
 <pre>void&nbsp;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">Flush all of the buffers and close the file. No methods on this writer
  should be called afterwards.</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>&nbsp;in interface&nbsp;<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>&nbsp;in interface&nbsp;<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>
 </li>
 </ul>
 <a name="getRawDataSize--">
 <!--   -->
 </a>
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 <h4>getRawDataSize</h4>
 <pre>long&nbsp;getRawDataSize()</pre>
 <div class="block">Return the deserialized data size. Raw data size will be compute when
  writing the file footer. Hence raw data size value will be available only
  after closing the writer.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>raw data size</dd>
 </dl>
 </li>
 </ul>
 <a name="getNumberOfRows--">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>getNumberOfRows</h4>
 <pre>long&nbsp;getNumberOfRows()</pre>
 <div class="block">Return the number of rows in file. Row count gets updated when flushing
  the stripes. To get accurate row count this method should be called after
  closing the writer.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>row count</dd>
 </dl>
 </li>
 </ul>
 <a name="writeIntermediateFooter--">
 <!--   -->
 </a>
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 <li class="blockList">
 <h4>writeIntermediateFooter</h4>
 <pre>long&nbsp;writeIntermediateFooter()
                       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">Write an intermediate footer on the file such that if the file is
  truncated to the returned offset, it would be a valid ORC file.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the offset that would be a valid end location for an ORC 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>
 </dl>
 </li>
 </ul>
 <a name="appendStripe-byte:A-int-int-org.apache.orc.StripeInformation-org.apache.orc.OrcProto.StripeStatistics-">
 <!--   -->
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 <h4>appendStripe</h4>
 <pre>void&nbsp;appendStripe(byte[]&nbsp;stripe,
                   int&nbsp;offset,
                   int&nbsp;length,
                   <a href="../../../org/apache/orc/StripeInformation.html" title="interface in org.apache.orc">StripeInformation</a>&nbsp;stripeInfo,
                   <a href="http://orc.apache.org/api/orc-core/org/apache/orc/OrcProto.StripeStatistics.html?is-external=true" title="class or interface in org.apache.orc">OrcProto.StripeStatistics</a>&nbsp;stripeStatistics)
            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">Fast stripe append to ORC file. This interface is used for fast ORC file
  merge with other ORC files. When merging, the file to be merged should pass
  stripe in binary form along with stripe information and stripe statistics.
  After appending last stripe of a file, use appendUserMetadata() to append
  any user metadata.

  This form only supports files with no column encryption. Use <a href="../../../org/apache/orc/Writer.html#appendStripe-byte:A-int-int-org.apache.orc.StripeInformation-org.apache.orc.StripeStatistics:A-"><code>appendStripe(byte[], int, int, StripeInformation, StripeStatistics[])</code></a>
  for files with encryption.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>stripe</code> - - stripe as byte array</dd>
 <dd><code>offset</code> - - offset within byte array</dd>
 <dd><code>length</code> - - length of stripe within byte array</dd>
 <dd><code>stripeInfo</code> - - stripe information</dd>
 <dd><code>stripeStatistics</code> - - unencrypted stripe statistics</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>
 </li>
 </ul>
 <a name="appendStripe-byte:A-int-int-org.apache.orc.StripeInformation-org.apache.orc.StripeStatistics:A-">
 <!--   -->
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 <h4>appendStripe</h4>
 <pre>void&nbsp;appendStripe(byte[]&nbsp;stripe,
                   int&nbsp;offset,
                   int&nbsp;length,
                   <a href="../../../org/apache/orc/StripeInformation.html" title="interface in org.apache.orc">StripeInformation</a>&nbsp;stripeInfo,
                   <a href="../../../org/apache/orc/StripeStatistics.html" title="class in org.apache.orc">StripeStatistics</a>[]&nbsp;stripeStatistics)
            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">Fast stripe append to ORC file. This interface is used for fast ORC file
  merge with other ORC files. When merging, the file to be merged should pass
  stripe in binary form along with stripe information and stripe statistics.
  After appending last stripe of a file, use <a href="../../../org/apache/orc/Writer.html#addUserMetadata-java.lang.String-java.nio.ByteBuffer-"><code>addUserMetadata(String,
  ByteBuffer)</code></a> to append any user metadata.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>stripe</code> - - stripe as byte array</dd>
 <dd><code>offset</code> - - offset within byte array</dd>
 <dd><code>length</code> - - length of stripe within byte array</dd>
 <dd><code>stripeInfo</code> - - stripe information</dd>
 <dd><code>stripeStatistics</code> - - stripe statistics with the last one being
                          for the unencrypted data and the others being for
                          each encryption variant.</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>
 </li>
 </ul>
 <a name="appendUserMetadata-java.util.List-">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>appendUserMetadata</h4>
 <pre>void&nbsp;appendUserMetadata(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="http://orc.apache.org/api/orc-core/org/apache/orc/OrcProto.UserMetadataItem.html?is-external=true" title="class or interface in org.apache.orc">OrcProto.UserMetadataItem</a>&gt;&nbsp;userMetadata)</pre>
 <div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;<span class="deprecationComment">use <a href="../../../org/apache/orc/Writer.html#addUserMetadata-java.lang.String-java.nio.ByteBuffer-"><code>addUserMetadata(String, ByteBuffer)</code></a> instead</span></div>
 <div class="block">Update the current user metadata with a list of new values.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>userMetadata</code> - - user metadata</dd>
 </dl>
 </li>
 </ul>
 <a name="getStatistics--">
 <!--   -->
 </a>
 <ul class="blockListLast">
 <li class="blockList">
 <h4>getStatistics</h4>
 <pre><a href="../../../org/apache/orc/ColumnStatistics.html" title="interface in org.apache.orc">ColumnStatistics</a>[]&nbsp;getStatistics()
                           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 statistics about the columns in the file. The output of this is
  based on the time at which it is called. It shall use all of the currently
  written data to provide the statistics.

  Please note there are costs involved with invoking this method and should
  be used judiciously.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the information about the column</dd>
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