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class="toctree-l2"><a class="reference internal" href="swift_integration.html#hadoop-configurations">Hadoop configurations</a></li> +<li class="toctree-l2"><a class="reference internal" href="swift_integration.html#tajo-configuration">Tajo configuration</a></li> +<li class="toctree-l2"><a class="reference internal" href="swift_integration.html#querying-on-swift">Querying on Swift</a></li> +</ul> +</li> +<li class="toctree-l1 current"><a class="current reference internal" href="">Tajo JDBC Driver</a><ul> +<li class="toctree-l2"><a class="reference internal" href="#how-to-get-jdbc-driver">How to get JDBC driver</a></li> +<li class="toctree-l2"><a class="reference internal" href="#setting-the-classpath">Setting the CLASSPATH</a></li> +<li class="toctree-l2"><a class="reference internal" href="#connecting-to-the-tajo-cluster-instance">Connecting to the Tajo cluster instance</a></li> +<li class="toctree-l2"><a class="reference internal" href="#connection-parameters">Connection Parameters</a></li> +<li class="toctree-l2"><a class="reference internal" href="#an-example-jdbc-client">An Example JDBC Client</a></li> +</ul> +</li> +<li class="toctree-l1"><a class="reference internal" href="tajo_client_api.html">Tajo Client API</a></li> +<li class="toctree-l1"><a class="reference internal" href="faq.html">FAQ</a></li> +</ul> + + + </div> + + </nav> + + <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> + + + <nav class="wy-nav-top" role="navigation" aria-label="top navigation"> + <i data-toggle="wy-nav-top" class="fa fa-bars"></i> + <a href="index.html">Apache Tajo</a> + </nav> + + + + <div class="wy-nav-content"> + <div class="rst-content"> + <div role="navigation" aria-label="breadcrumbs navigation"> + <ul class="wy-breadcrumbs"> + <li><a href="index.html">Docs</a> »</li> + + <li>Tajo JDBC Driver</li> + <li class="wy-breadcrumbs-aside"> + + <a href="_sources/jdbc_driver.txt" rel="nofollow"> View page source</a> + + </li> + </ul> + <hr/> +</div> + <div role="main"> + + <div class="section" id="tajo-jdbc-driver"> +<h1>Tajo JDBC Driver<a class="headerlink" href="#tajo-jdbc-driver" title="Permalink to this headline">¶</a></h1> +<p>Apache Tajo⢠provides JDBC driver +which enables Java applciations to easily access Apache Tajo in a RDBMS-like manner. +In this section, we explain how to get JDBC driver and an example code.</p> +<div class="section" id="how-to-get-jdbc-driver"> +<h2>How to get JDBC driver<a class="headerlink" href="#how-to-get-jdbc-driver" title="Permalink to this headline">¶</a></h2> +<div class="section" id="direct-download"> +<h3>Direct Download<a class="headerlink" href="#direct-download" title="Permalink to this headline">¶</a></h3> +<p>You can directly download a JDBC driver jar file (<code class="docutils literal"><span class="pre">tajo-jdbc-x.y.z.jar</span></code>) from <a class="reference external" href="http://tajo.apache.org/downloads.html";>Downloads</a>.</p> +</div> +<div class="section" id="from-binary-distribution"> +<h3>From Binary Distribution<a class="headerlink" href="#from-binary-distribution" title="Permalink to this headline">¶</a></h3> +<p>Tajo binary distribution provides JDBC jar file located in <code class="docutils literal"><span class="pre">${TAJO_HOME}/share/jdbc-dist/tajo-jdbc-x.y.z.jar</span></code>.</p> +</div> +<div class="section" id="from-building-source-code"> +<h3>From Building Source Code<a class="headerlink" href="#from-building-source-code" title="Permalink to this headline">¶</a></h3> +<p>You can build Tajo from the source code and then get JAR files as follows:</p> +<div class="highlight-bash"><div class="highlight"><pre><span class="nv">$ </span>tar xzvf tajo-x.y.z-src.tar.gz +<span class="nv">$ </span>mvn clean package -DskipTests -Pdist -Dtar +<span class="nv">$ </span>ls -l tajo-dist/target/tajo-x.y.z/share/jdbc-dist/tajo-jdbc-x.y.z.jar +</pre></div> +</div> +</div> +</div> +<div class="section" id="setting-the-classpath"> +<h2>Setting the CLASSPATH<a class="headerlink" href="#setting-the-classpath" title="Permalink to this headline">¶</a></h2> +<p>In order to use the JDBC driver, you should add <code class="docutils literal"><span class="pre">tajo-jdbc-x.y.z.jar</span></code> in your <code class="docutils literal"><span class="pre">CLASSPATH</span></code>.</p> +<div class="highlight-bash"><div class="highlight"><pre><span class="nv">CLASSPATH</span><span class="o">=</span>path/to/tajo-jdbc-x.y.z.jar:<span class="nv">$CLASSPATH</span> +</pre></div> +</div> +</div> +<div class="section" id="connecting-to-the-tajo-cluster-instance"> +<h2>Connecting to the Tajo cluster instance<a class="headerlink" href="#connecting-to-the-tajo-cluster-instance" title="Permalink to this headline">¶</a></h2> +<p>A Tajo cluster is represented by a URL. Tajo JDBC driver can take the following URL forms:</p> +<blockquote> +<div><ul class="simple"> +<li><code class="docutils literal"><span class="pre">jdbc:tajo://host/</span></code></li> +<li><code class="docutils literal"><span class="pre">jdbc:tajo://host/database</span></code></li> +<li><code class="docutils literal"><span class="pre">jdbc:tajo://host:port/</span></code></li> +<li><code class="docutils literal"><span class="pre">jdbc:tajo://host:port/database</span></code></li> +</ul> +</div></blockquote> +<p>Each part of URL has the following meanings:</p> +<blockquote> +<div><ul class="simple"> +<li><code class="docutils literal"><span class="pre">host</span></code> - The hostname of the TajoMaster. You can put hostname or ip address here.</li> +<li><code class="docutils literal"><span class="pre">port</span></code> - The port number that server is listening. Default port number is 26002.</li> +<li><code class="docutils literal"><span class="pre">database</span></code> - The database name. The default database name is <code class="docutils literal"><span class="pre">default</span></code>.</li> +</ul> +<p>To connect, you need to get <code class="docutils literal"><span class="pre">Connection</span></code> instance from Java JDBC Driver Manager as follows:</p> +</div></blockquote> +<div class="highlight-java"><div class="highlight"><pre><span class="n">Connection</span> <span class="n">db</span> <span class="o">=</span> <span class="n">DriverManager</span><span class="o">.</span><span class="na">getConnection</span><span class="o">(</span><span class="n">url</span><span class="o">);</span> +</pre></div> +</div> +</div> +<div class="section" id="connection-parameters"> +<h2>Connection Parameters<a class="headerlink" href="#connection-parameters" title="Permalink to this headline">¶</a></h2> +<p>Connection parameters lets the JDBC Copnnection to enable or disable additional features. You should use <code class="docutils literal"><span class="pre">java.util.Properties</span></code> to pass your connection parameters into <code class="docutils literal"><span class="pre">Connection</span></code>. The following example means that the transmission of ResultSet uses compression and its connection timeout is 15 seconds.</p> +<div class="highlight-java"><div class="highlight"><pre><span class="n">String</span> <span class="n">url</span> <span class="o">=</span> <span class="s">"jdbc:tajo://localhost/test"</span><span class="o">;</span> +<span class="n">Properties</span> <span class="n">props</span> <span class="o">=</span> <span class="k">new</span> <span class="n">Properties</span><span class="o">();</span> +<span class="n">props</span><span class="o">.</span><span class="na">setProperty</span><span class="o">(</span><span class="s">"useCompression"</span><span class="o">,</span><span class="s">"true"</span><span class="o">);</span> <span class="c1">// use compression for ResultSet</span> +<span class="n">props</span><span class="o">.</span><span class="na">setProperty</span><span class="o">(</span><span class="s">"connectTimeout"</span><span class="o">,</span><span class="s">"15000"</span><span class="o">);</span> <span class="c1">// 15 seconds</span> +<span class="n">Connection</span> <span class="n">conn</span> <span class="o">=</span> <span class="n">DriverManager</span><span class="o">.</span><span class="na">getConnection</span><span class="o">(</span><span class="n">url</span><span class="o">,</span> <span class="n">props</span><span class="o">);</span> +</pre></div> +</div> +<p>The connection parameters that Tajo currently supports are as follows:</p> +<blockquote> +<div><ul class="simple"> +<li><code class="docutils literal"><span class="pre">useCompression</span> <span class="pre">=</span> <span class="pre">bool</span></code> - Enable compressed transfer for ResultSet.</li> +<li><code class="docutils literal"><span class="pre">defaultRowFetchSize</span> <span class="pre">=</span> <span class="pre">int</span></code> - Determine the number of rows fetched in ResultSet by one fetch with trip to the Server.</li> +<li><code class="docutils literal"><span class="pre">connectTimeout</span> <span class="pre">=</span> <span class="pre">int</span> <span class="pre">(seconds)</span></code> - The timeout value used for socket connect operations. If connecting to the server takes longer than this value, the connection is broken. The timeout is specified in seconds and a value of zero means that it is disabled.</li> +<li><code class="docutils literal"><span class="pre">socketTimeout</span> <span class="pre">=</span> <span class="pre">int</span> <span class="pre">(seconds)</span></code> - The timeout value used for socket read operations. If reading from the server takes longer than this value, the connection is closed. This can be used as both a brute force global query timeout and a method of detecting network problems. The timeout is specified in seconds and a value of zero means that it is disabled.</li> +<li><code class="docutils literal"><span class="pre">retry</span> <span class="pre">=</span> <span class="pre">int</span></code> - Number of retry operation. Tajo JDBC driver is resilient against some network or connection problems. It determines how many times the connection will retry.</li> +</ul> +</div></blockquote> +</div> +<div class="section" id="an-example-jdbc-client"> +<h2>An Example JDBC Client<a class="headerlink" href="#an-example-jdbc-client" title="Permalink to this headline">¶</a></h2> +<p>The JDBC driver class name is <code class="docutils literal"><span class="pre">org.apache.tajo.jdbc.TajoDriver</span></code>. +You can get the driver <code class="docutils literal"><span class="pre">Class.forName("org.apache.tajo.jdbc.TajoDriver")</span></code>. +The connection url should be <code class="docutils literal"><span class="pre">jdbc:tajo://<TajoMaster</span> <span class="pre">hostname>:<TajoMaster</span> <span class="pre">client</span> <span class="pre">rpc</span> <span class="pre">port>/<database</span> <span class="pre">name></span></code>. +The default TajoMaster client rpc port is <code class="docutils literal"><span class="pre">26002</span></code>. +If you want to change the listening port, please refer <a class="reference internal" href="configuration/cluster_setup.html"><em>Cluster Setup</em></a>.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">Currently, Tajo does not support the concept of database and namespace. +All tables are contained in <code class="docutils literal"><span class="pre">default</span></code> database. So, you don’t need to specify any database name.</p> +</div> +<p>The following shows an example of JDBC Client.</p> +<div class="highlight-java"><div class="highlight"><pre><span class="kn">import</span> <span class="nn">java.sql.Connection</span><span class="o">;</span> +<span class="kn">import</span> <span class="nn">java.sql.ResultSet</span><span class="o">;</span> +<span class="kn">import</span> <span class="nn">java.sql.Statement</span><span class="o">;</span> +<span class="kn">import</span> <span class="nn">java.sql.DriverManager</span><span class="o">;</span> + +<span class="kd">public</span> <span class="kd">class</span> <span class="nc">TajoJDBCClient</span> <span class="o">{</span> + + <span class="o">....</span> + + <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="n">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="n">Exception</span> <span class="o">{</span> + + <span class="k">try</span> <span class="o">{</span> + <span class="n">Class</span><span class="o">.</span><span class="na">forName</span><span class="o">(</span><span class="s">"org.apache.tajo.jdbc.TajoDriver"</span><span class="o">);</span> + <span class="o">}</span> <span class="k">catch</span> <span class="o">(</span><span class="n">ClassNotFoundException</span> <span class="n">e</span><span class="o">)</span> <span class="o">{</span> + <span class="c1">// fill your handling code</span> + <span class="o">}</span> + + <span class="n">Connection</span> <span class="n">conn</span> <span class="o">=</span> <span class="n">DriverManager</span><span class="o">.</span><span class="na">getConnection</span><span class="o">(</span><span class="s">"jdbc:tajo://127.0.0.1:26002/default"</span><span class="o">);</span> + + <span class="n">Statement</span> <span class="n">stmt</span> <span class="o">=</span> <span class="kc">null</span><span class="o">;</span> + <span class="n">ResultSet</span> <span class="n">rs</span> <span class="o">=</span> <span class="kc">null</span><span class="o">;</span> + <span class="k">try</span> <span class="o">{</span> + <span class="n">stmt</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="na">createStatement</span><span class="o">();</span> + <span class="n">rs</span> <span class="o">=</span> <span class="n">stmt</span><span class="o">.</span><span class="na">executeQuery</span><span class="o">(</span><span class="s">"select * from table1"</span><span class="o">);</span> + <span class="k">while</span> <span class="o">(</span><span class="n">rs</span><span class="o">.</span><span class="na">next</span><span class="o">())</span> <span class="o">{</span> + <span class="n">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="n">rs</span><span class="o">.</span><span class="na">getString</span><span class="o">(</span><span class="mi">1</span><span class="o">)</span> <span class="o">+</span> <span class="s">","</span> <span class="o">+</span> <span class="n">rs</span><span class="o">.</span><span class="na">getString</span><span class="o">(</span><span class="mi">3</span><span class="o">));</span> + <span class="o">}</span> + <span class="o">}</span> <span class="k">finally</span> <span class="o">{</span> + <span class="k">if</span> <span class="o">(</span><span class="n">rs</span> <span class="o">!=</span> <span class="kc">null</span><span class="o">)</span> <span class="n">rs</span><span class="o">.</span><span class="na">close</span><span class="o">();</span> + <span class="k">if</span> <span class="o">(</span><span class="n">stmt</span> <span class="o">!=</span> <span class="kc">null</span><span class="o">)</span> <span class="n">stmt</span><span class="o">.</span><span class="na">close</span><span class="o">();</span> + <span class="k">if</span> <span class="o">(</span><span class="n">conn</span> <span class="o">!=</span> <span class="kc">null</span><span class="o">)</span> <span class="n">conn</span><span class="o">.</span><span class="na">close</span><span class="o">();</span> + <span class="o">}</span> + <span class="o">}</span> +<span class="o">}</span> +</pre></div> +</div> +</div> +</div> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="tajo_client_api.html" class="btn btn-neutral float-right" title="Tajo Client API"/>Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="swift_integration.html" class="btn btn-neutral" title="OpenStack Swift Integration"><span class="fa fa-arrow-circle-left"></span> Previous</a> + + </div> + + + <hr/> + + <div role="contentinfo"> + <p> + © Copyright 2014, Apache Tajo Team. + </p> + </div> + + <a href="https://github.com/snide/sphinx_rtd_theme";>Sphinx theme</a> provided by <a href="https://readthedocs.org";>Read the Docs</a> +</footer> + </div> + </div> + + </section> + + </div> + + + + + + <script type="text/javascript"> + var DOCUMENTATION_OPTIONS = { + URL_ROOT:'./', + VERSION:'0.11.0', + COLLAPSE_INDEX:false, + FILE_SUFFIX:'.html', + HAS_SOURCE: true + }; + </script> + <script type="text/javascript" src="_static/jquery.js"></script> + <script type="text/javascript" src="_static/underscore.js"></script> + <script type="text/javascript" src="_static/doctools.js"></script> + + + + + + <script type="text/javascript" src="_static/js/theme.js"></script> + + + + + <script type="text/javascript"> + jQuery(function () { + SphinxRtdTheme.StickyNav.enable(); + }); + </script> + + +</body> +</html> \ No newline at end of file
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Zone</a></li> +<li class="toctree-l2"><a class="reference internal" href="../time_zone.html#table-time-zone">Table Time Zone</a></li> +<li class="toctree-l2"><a class="reference internal" href="../time_zone.html#client-time-zone">Client Time Zone</a></li> +<li class="toctree-l2"><a class="reference internal" href="../time_zone.html#time-zone-id">Time Zone ID</a></li> +<li class="toctree-l2"><a class="reference internal" href="../time_zone.html#examples-of-time-zone">Examples of Time Zone</a></li> +</ul> +</li> +<li class="toctree-l1"><a class="reference internal" href="../functions.html">Functions</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../functions.html#built-in-scalar-functions">Built-in Scalar Functions</a></li> +<li class="toctree-l2"><a class="reference internal" href="../functions.html#built-in-aggregation-functions">Built-in Aggregation Functions</a></li> +<li class="toctree-l2"><a class="reference internal" href="../functions.html#built-in-window-functions">Built-in Window Functions</a></li> +<li class="toctree-l2"><a class="reference internal" href="../functions.html#user-defined-functions">User-defined Functions</a></li> +</ul> +</li> +<li class="toctree-l1"><a class="reference internal" href="../table_management.html">Table Management</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../table_management/table_overview.html">Overview of Tajo Tables</a></li> +<li class="toctree-l2"><a class="reference internal" href="../table_management/tablespaces.html">Tablespaces</a></li> +<li class="toctree-l2"><a class="reference internal" href="../table_management/file_formats.html">File Formats</a></li> +<li class="toctree-l2"><a class="reference internal" href="../table_management/compression.html">Compression</a></li> +</ul> +</li> +<li class="toctree-l1 current"><a class="reference internal" href="../table_partitioning.html">Table Partitioning</a><ul class="current"> +<li class="toctree-l2"><a class="reference internal" href="intro_to_partitioning.html">Introduction to Partitioning</a></li> +<li class="toctree-l2 current"><a class="current reference internal" href="">Column Partitioning</a></li> +<li class="toctree-l2"><a class="reference internal" href="range_partitioning.html">Range Partitioning</a></li> +<li class="toctree-l2"><a class="reference internal" href="hash_partitioning.html">Hash Partitioning</a></li> +</ul> +</li> +<li class="toctree-l1"><a class="reference internal" href="../storage_plugins.html">Storage Plugin</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../storage_plugins/overview.html">Storage Plugin Overview</a></li> +<li class="toctree-l2"><a class="reference internal" href="../storage_plugins/postgresql.html">PostgreSQL Storage Handler</a></li> +</ul> +</li> +<li class="toctree-l1"><a class="reference internal" href="../index_overview.html">Index (Experimental Feature)</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../index/types.html">Index Types</a></li> +<li class="toctree-l2"><a class="reference internal" href="../index/how_to_use.html">How to use index?</a></li> +<li class="toctree-l2"><a class="reference internal" href="../index/future_work.html">Future Works</a></li> +</ul> +</li> +<li class="toctree-l1"><a class="reference internal" href="../backup_and_restore.html">Backup and Restore</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../backup_and_restore/catalog.html">Backup and Restore Catalog</a></li> +</ul> +</li> +<li class="toctree-l1"><a class="reference internal" href="../hive_integration.html">Hive Integration</a></li> +<li class="toctree-l1"><a class="reference internal" href="../hbase_integration.html">HBase Integration</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#create-table">CREATE TABLE</a></li> +<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#drop-table">DROP TABLE</a></li> +<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#insert-overwrite-into">INSERT (OVERWRITE) INTO</a></li> +<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#usage">Usage</a></li> +</ul> +</li> +<li class="toctree-l1"><a class="reference internal" href="../swift_integration.html">OpenStack Swift Integration</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../swift_integration.html#swift-configuration">Swift configuration</a></li> +<li class="toctree-l2"><a class="reference internal" href="../swift_integration.html#hadoop-configurations">Hadoop configurations</a></li> +<li class="toctree-l2"><a class="reference internal" href="../swift_integration.html#tajo-configuration">Tajo configuration</a></li> +<li class="toctree-l2"><a class="reference internal" href="../swift_integration.html#querying-on-swift">Querying on Swift</a></li> +</ul> +</li> +<li class="toctree-l1"><a class="reference internal" href="../jdbc_driver.html">Tajo JDBC Driver</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#how-to-get-jdbc-driver">How to get JDBC driver</a></li> +<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#setting-the-classpath">Setting the CLASSPATH</a></li> +<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#connecting-to-the-tajo-cluster-instance">Connecting to the Tajo cluster instance</a></li> +<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#connection-parameters">Connection Parameters</a></li> +<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#an-example-jdbc-client">An Example JDBC Client</a></li> +</ul> +</li> +<li class="toctree-l1"><a class="reference internal" href="../tajo_client_api.html">Tajo Client API</a></li> +<li class="toctree-l1"><a class="reference internal" href="../faq.html">FAQ</a></li> +</ul> + + + </div> + + </nav> + + <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> + + + <nav class="wy-nav-top" role="navigation" aria-label="top navigation"> + <i data-toggle="wy-nav-top" class="fa fa-bars"></i> + <a href="../index.html">Apache Tajo</a> + </nav> + + + + <div class="wy-nav-content"> + <div class="rst-content"> + <div role="navigation" aria-label="breadcrumbs navigation"> + <ul class="wy-breadcrumbs"> + <li><a href="../index.html">Docs</a> »</li> + + <li><a href="../table_partitioning.html">Table Partitioning</a> »</li> + + <li>Column Partitioning</li> + <li class="wy-breadcrumbs-aside"> + + <a href="../_sources/partitioning/column_partitioning.txt" rel="nofollow"> View page source</a> + + </li> + </ul> + <hr/> +</div> + <div role="main"> + + <div class="section" id="column-partitioning"> +<h1>Column Partitioning<a class="headerlink" href="#column-partitioning" title="Permalink to this headline">¶</a></h1> +<p>The column table partition is designed to support the partition of Apache Hiveâ¢.</p> +<div class="section" id="how-to-create-a-column-partitioned-table"> +<h2>How to Create a Column Partitioned Table<a class="headerlink" href="#how-to-create-a-column-partitioned-table" title="Permalink to this headline">¶</a></h2> +<p>You can create a partitioned table by using the <code class="docutils literal"><span class="pre">PARTITION</span> <span class="pre">BY</span></code> clause. For a column partitioned table, you should use +the <code class="docutils literal"><span class="pre">PARTITION</span> <span class="pre">BY</span> <span class="pre">COLUMN</span></code> clause with partition keys.</p> +<p>For example, assume there is a table <code class="docutils literal"><span class="pre">orders</span></code> composed of the following schema.</p> +<div class="highlight-python"><div class="highlight"><pre>id INT, +item_name TEXT, +price FLOAT +</pre></div> +</div> +<p>Also, assume that you want to use <code class="docutils literal"><span class="pre">order_date</span> <span class="pre">TEXT</span></code> and <code class="docutils literal"><span class="pre">ship_date</span> <span class="pre">TEXT</span></code> as the partition keys. +Then, you should create a table as follows:</p> +<div class="highlight-sql"><div class="highlight"><pre><span class="k">CREATE</span> <span class="k">TABLE</span> <span class="n">orders</span> <span class="p">(</span> + <span class="n">id</span> <span class="nb">INT</span><span class="p">,</span> + <span class="n">item_name</span> <span class="nb">TEXT</span><span class="p">,</span> + <span class="n">price</span> +<span class="p">)</span> <span class="n">PARTITION</span> <span class="k">BY</span> <span class="k">COLUMN</span> <span class="p">(</span><span class="n">order_date</span> <span class="nb">TEXT</span><span class="p">,</span> <span class="n">ship_date</span> <span class="nb">TEXT</span><span class="p">);</span> +</pre></div> +</div> +</div> +<div class="section" id="partition-pruning-on-column-partitioned-tables"> +<h2>Partition Pruning on Column Partitioned Tables<a class="headerlink" href="#partition-pruning-on-column-partitioned-tables" title="Permalink to this headline">¶</a></h2> +<p>The following predicates in the <code class="docutils literal"><span class="pre">WHERE</span></code> clause can be used to prune unqualified column partitions without processing +during query planning phase.</p> +<ul class="simple"> +<li><code class="docutils literal"><span class="pre">=</span></code></li> +<li><code class="docutils literal"><span class="pre"><></span></code></li> +<li><code class="docutils literal"><span class="pre">></span></code></li> +<li><code class="docutils literal"><span class="pre"><</span></code></li> +<li><code class="docutils literal"><span class="pre">>=</span></code></li> +<li><code class="docutils literal"><span class="pre"><=</span></code></li> +<li>LIKE predicates with a leading wild-card character</li> +<li>IN list predicates</li> +</ul> +</div> +<div class="section" id="compatibility-issues-with-apache-hive"> +<h2>Compatibility Issues with Apache Hiveâ¢<a class="headerlink" href="#compatibility-issues-with-apache-hive" title="Permalink to this headline">¶</a></h2> +<p>If partitioned tables of Hive are created as external tables in Tajo, Tajo can process the Hive partitioned tables directly. +There haven’t known compatibility issues yet.</p> +</div> +</div> + 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id="partitioning-methods"> +<h2>Partitioning Methods<a class="headerlink" href="#partitioning-methods" title="Permalink to this headline">¶</a></h2> +<dl class="docutils"> +<dt>Tajo provides the following partitioning methods:</dt> +<dd><ul class="first last simple"> +<li>Column Partitioning</li> +<li>Range Partitioning (TODO)</li> +<li>Hash Partitioning (TODO)</li> +</ul> +</dd> +</dl> +</div> +</div> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="column_partitioning.html" class="btn btn-neutral float-right" title="Column Partitioning"/>Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="../table_partitioning.html" class="btn btn-neutral" title="Table Partitioning"><span class="fa fa-arrow-circle-left"></span> Previous</a> + + </div> + + + <hr/> + + <div role="contentinfo"> + <p> + © Copyright 2014, Apache Tajo Team. + </p> + </div> + + <a 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