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From jihoon...@apache.org
Subject svn commit: r1728394 [25/42] - in /tajo/site/docs: 0.11.1/ 0.11.1/_sources/ 0.11.1/_sources/backup_and_restore/ 0.11.1/_sources/configuration/ 0.11.1/_sources/functions/ 0.11.1/_sources/index/ 0.11.1/_sources/partitioning/ 0.11.1/_sources/sql_language/...
Date Thu, 04 Feb 2016 00:29:12 GMT
Added: tajo/site/docs/0.11.1/sql_language/alter_table.html
URL: http://svn.apache.org/viewvc/tajo/site/docs/0.11.1/sql_language/alter_table.html?rev=1728394&view=auto
==============================================================================
--- tajo/site/docs/0.11.1/sql_language/alter_table.html (added)
+++ tajo/site/docs/0.11.1/sql_language/alter_table.html Thu Feb  4 00:29:05 2016
@@ -0,0 +1,352 @@
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+  <div class="section" id="alter-table">
+<h1>ALTER TABLE<a class="headerlink" href="#alter-table" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="rename-table">
+<h2>RENAME TABLE<a class="headerlink" href="#rename-table" title="Permalink to this headline">¶</a></h2>
+<p><em>Synopsis</em></p>
+<div class="highlight-sql"><div class="highlight"><pre><span class="k">ALTER</span> <span class="k">TABLE</span> <span class="o">&lt;</span><span class="k">table_name</span><span class="o">&gt;</span> <span class="k">RENAME</span> <span class="k">TO</span> <span class="o">&lt;</span><span class="n">new_table_name</span><span class="o">&gt;</span>
+
+<span class="k">For</span> <span class="n">example</span><span class="p">:</span>
+<span class="k">ALTER</span> <span class="k">TABLE</span> <span class="n">table1</span> <span class="k">RENAME</span> <span class="k">TO</span> <span class="n">table2</span><span class="p">;</span>
+</pre></div>
+</div>
+<p>This statement lets you change the name of a table to a different name.</p>
+</div>
+<div class="section" id="rename-column">
+<h2>RENAME COLUMN<a class="headerlink" href="#rename-column" title="Permalink to this headline">¶</a></h2>
+<p><em>Synopsis</em></p>
+<div class="highlight-sql"><div class="highlight"><pre><span class="k">ALTER</span> <span class="k">TABLE</span> <span class="o">&lt;</span><span class="k">table_name</span><span class="o">&gt;</span> <span class="k">RENAME</span> <span class="k">COLUMN</span> <span class="o">&lt;</span><span class="k">column_name</span><span class="o">&gt;</span> <span class="k">TO</span> <span class="o">&lt;</span><span class="n">new_column_name</span><span class="o">&gt;</span>
+
+<span class="k">For</span> <span class="n">example</span><span class="p">:</span>
+<span class="k">ALTER</span> <span class="k">TABLE</span> <span class="n">table1</span> <span class="k">RENAME</span> <span class="k">COLUMN</span> <span class="n">id</span> <span class="k">TO</span> <span class="n">id2</span><span class="p">;</span>
+</pre></div>
+</div>
+<p>This statement will allow users to change a column&#8217;s name.</p>
+</div>
+<div class="section" id="add-column">
+<h2>ADD COLUMN<a class="headerlink" href="#add-column" title="Permalink to this headline">¶</a></h2>
+<p><em>Synopsis</em></p>
+<div class="highlight-sql"><div class="highlight"><pre><span class="k">ALTER</span> <span class="k">TABLE</span> <span class="o">&lt;</span><span class="k">table_name</span><span class="o">&gt;</span> <span class="k">ADD</span> <span class="k">COLUMN</span> <span class="o">&lt;</span><span class="k">column_name</span><span class="o">&gt;</span> <span class="o">&lt;</span><span class="n">data_type</span><span class="o">&gt;</span>
+
+<span class="k">For</span> <span class="n">example</span><span class="p">:</span>
+<span class="k">ALTER</span> <span class="k">TABLE</span> <span class="n">table1</span> <span class="k">ADD</span> <span class="k">COLUMN</span> <span class="n">id</span> <span class="nb">text</span><span class="p">;</span>
+</pre></div>
+</div>
+<p>This statement lets you add new columns to the end of the existing column.</p>
+</div>
+<div class="section" id="set-property">
+<h2>SET PROPERTY<a class="headerlink" href="#set-property" title="Permalink to this headline">¶</a></h2>
+<p><em>Synopsis</em></p>
+<div class="highlight-sql"><div class="highlight"><pre><span class="k">ALTER</span> <span class="k">TABLE</span> <span class="o">&lt;</span><span class="k">table_name</span><span class="o">&gt;</span> <span class="k">SET</span> <span class="n">PROPERTY</span> <span class="p">(</span><span class="o">&lt;</span><span class="k">key</span><span class="o">&gt;</span> <span class="o">=</span> <span class="o">&lt;</span><span class="n">value</span><span class="o">&gt;</span><span class="p">,</span> <span class="p">...)</span>
+
+<span class="k">For</span> <span class="n">example</span><span class="p">:</span>
+<span class="k">ALTER</span> <span class="k">TABLE</span> <span class="n">table1</span> <span class="k">SET</span> <span class="n">PROPERTY</span> <span class="s1">&#39;timezone&#39;</span> <span class="o">=</span> <span class="s1">&#39;GMT-7&#39;</span>
+<span class="k">ALTER</span> <span class="k">TABLE</span> <span class="n">table1</span> <span class="k">SET</span> <span class="n">PROPERTY</span> <span class="s1">&#39;text.delimiter&#39;</span> <span class="o">=</span> <span class="s1">&#39;&amp;&#39;</span>
+<span class="k">ALTER</span> <span class="k">TABLE</span> <span class="n">table1</span> <span class="k">SET</span> <span class="n">PROPERTY</span> <span class="s1">&#39;compression.type&#39;</span><span class="o">=</span><span class="s1">&#39;RECORD&#39;</span><span class="p">,</span><span class="s1">&#39;compression.codec&#39;</span><span class="o">=</span><span class="s1">&#39;org.apache.hadoop.io.compress.SnappyCodec&#39;</span>
+</pre></div>
+</div>
+<p>This statement will allow users to change a table property.</p>
+</div>
+<div class="section" id="drop-partition">
+<h2>DROP PARTITION<a class="headerlink" href="#drop-partition" title="Permalink to this headline">¶</a></h2>
+<p><em>Synopsis</em></p>
+<div class="highlight-sql"><div class="highlight"><pre><span class="k">ALTER</span> <span class="k">TABLE</span> <span class="o">&lt;</span><span class="k">table_name</span><span class="o">&gt;</span> <span class="p">[</span><span class="n">IF</span> <span class="k">EXISTS</span><span class="p">]</span> <span class="k">DROP</span> <span class="n">PARTITION</span> <span class="p">(</span><span class="o">&lt;</span><span class="n">partition</span> <span class="k">column</span><span class="o">&gt;</span> <span class="o">=</span> <span class="o">&lt;</span><span class="n">partition</span> <span class="n">value</span><span class="o">&gt;</span><span class="p">,</span> <span class="p">...)</span> <span class="p">[</span><span class="n">PURGE</span><span class="p">]</span>
+
+<span class="k">For</span> <span class="n">example</span><span class="p">:</span>
+<span class="k">ALTER</span> <span class="k">TABLE</span> <span class="n">table1</span> <span class="k">DROP</span> <span class="n">PARTITION</span> <span class="p">(</span><span class="n">col1</span> <span class="o">=</span> <span class="mi">1</span> <span class="p">,</span> <span class="n">col2</span> <span class="o">=</span> <span class="mi">2</span><span class="p">)</span>
+<span class="k">ALTER</span> <span class="k">TABLE</span> <span class="n">table1</span> <span class="k">DROP</span> <span class="n">PARTITION</span> <span class="p">(</span><span class="n">col1</span> <span class="o">=</span> <span class="s1">&#39;2015&#39;</span> <span class="p">,</span> <span class="n">col2</span> <span class="o">=</span> <span class="s1">&#39;01&#39;</span><span class="p">,</span> <span class="n">col3</span> <span class="o">=</span> <span class="s1">&#39;11&#39;</span> <span class="p">)</span>
+<span class="k">ALTER</span> <span class="k">TABLE</span> <span class="n">table1</span> <span class="k">DROP</span> <span class="n">PARTITION</span> <span class="p">(</span><span class="n">col1</span> <span class="o">=</span> <span class="s1">&#39;TAJO&#39;</span> <span class="p">)</span> <span class="n">PURGE</span>
+</pre></div>
+</div>
+<p>You can use <code class="docutils literal"><span class="pre">ALTER</span> <span class="pre">TABLE</span> <span class="pre">DROP</span> <span class="pre">PARTITION</span></code> to drop a partition for a table. This doesn&#8217;t remove the data for a table. But if <code class="docutils literal"><span class="pre">PURGE</span></code> is specified, the partition data will be removed. The metadata is completely lost in all cases. An error is thrown if the partition for the table doesn&#8217;t exist. You can use <code class="docutils literal"><span class="pre">IF</span> <span class="pre">EXISTS</span></code> to skip the error.</p>
+</div>
+<div class="section" id="repair-partition">
+<h2>REPAIR PARTITION<a class="headerlink" href="#repair-partition" title="Permalink to this headline">¶</a></h2>
+<p>Tajo stores a list of partitions for each table in its catalog. If partitions are manually added to the distributed file system, the metastore is not aware of these partitions. Running the <code class="docutils literal"><span class="pre">ALTER</span> <span class="pre">TABLE</span> <span class="pre">REPAIR</span> <span class="pre">PARTITION</span></code> statement ensures that the tables are properly populated.</p>
+<p><em>Synopsis</em></p>
+<div class="highlight-sql"><div class="highlight"><pre><span class="k">ALTER</span> <span class="k">TABLE</span> <span class="o">&lt;</span><span class="k">table_name</span><span class="o">&gt;</span> <span class="n">REPAIR</span> <span class="n">PARTITION</span>
+</pre></div>
+</div>
+<div class="admonition note">
+<p class="first admonition-title">Note</p>
+<p class="last">Even though an information of a partition is stored in the catalog, Tajo does not recover it when its partition directory doesn&#8217;t exist in the file system.</p>
+</div>
+</div>
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Added: tajo/site/docs/0.11.1/sql_language/data_model.html
URL: http://svn.apache.org/viewvc/tajo/site/docs/0.11.1/sql_language/data_model.html?rev=1728394&view=auto
==============================================================================
--- tajo/site/docs/0.11.1/sql_language/data_model.html (added)
+++ tajo/site/docs/0.11.1/sql_language/data_model.html Thu Feb  4 00:29:05 2016
@@ -0,0 +1,476 @@
+
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+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+<li class="toctree-l2"><a class="reference internal" href="../tsql/intro.html">Introducing to TSQL</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../tsql/single_command.html">Executing a single command</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../tsql/execute_file.html">Executing Queries from Files</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../tsql/background_command.html">Executing as background process</a></li>
+</ul>
+</li>
+<li class="toctree-l1 current"><a class="reference internal" href="../sql_language.html">SQL Language</a><ul class="current">
+<li class="toctree-l2 current"><a class="current reference internal" href="">Data Model</a></li>
+<li class="toctree-l2"><a class="reference internal" href="ddl.html">Data Definition Language</a></li>
+<li class="toctree-l2"><a class="reference internal" href="insert.html">INSERT (OVERWRITE) INTO</a></li>
+<li class="toctree-l2"><a class="reference internal" href="alter_table.html">ALTER TABLE</a></li>
+<li class="toctree-l2"><a class="reference internal" href="queries.html">Queries</a></li>
+<li class="toctree-l2"><a class="reference internal" href="joins.html">Joins</a></li>
+<li class="toctree-l2"><a class="reference internal" href="sql_expression.html">SQL Expressions</a></li>
+<li class="toctree-l2"><a class="reference internal" href="predicates.html">Predicates</a></li>
+<li class="toctree-l2"><a class="reference internal" href="explain.html">EXPLAIN</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../time_zone.html">Time Zone</a><ul>
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+<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>
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+<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>
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+<li class="toctree-l2"><a class="reference internal" href="../table_management/compression.html">Compression</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../table_partitioning.html">Table Partitioning</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/intro_to_partitioning.html">Introduction to Partitioning</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/column_partitioning.html">Column Partitioning</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/range_partitioning.html">Range Partitioning</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/hash_partitioning.html">Hash Partitioning</a></li>
+</ul>
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+<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>
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+<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>
+
+        
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+      &nbsp;
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+
+    <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
+
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+      <nav class="wy-nav-top" role="navigation" aria-label="top navigation">
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+        <a href="../index.html">Apache Tajo</a>
+      </nav>
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+        <div class="rst-content">
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+  <ul class="wy-breadcrumbs">
+    <li><a href="../index.html">Docs</a> &raquo;</li>
+      
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+      
+    <li>Data Model</li>
+      <li class="wy-breadcrumbs-aside">
+        
+          <a href="../_sources/sql_language/data_model.txt" rel="nofollow"> View page source</a>
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+  <hr/>
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+          <div role="main">
+            
+  <div class="section" id="data-model">
+<h1>Data Model<a class="headerlink" href="#data-model" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="data-types">
+<h2>Data Types<a class="headerlink" href="#data-types" title="Permalink to this headline">¶</a></h2>
+<table border="1" class="docutils">
+<colgroup>
+<col width="6%" />
+<col width="8%" />
+<col width="15%" />
+<col width="7%" />
+<col width="26%" />
+<col width="38%" />
+</colgroup>
+<thead valign="bottom">
+<tr class="row-odd"><th class="head">Support</th>
+<th class="head">SQL Type Name</th>
+<th class="head">Alias</th>
+<th class="head">Size (byte)</th>
+<th class="head">Description</th>
+<th class="head">Range</th>
+</tr>
+</thead>
+<tbody valign="top">
+<tr class="row-even"><td>O</td>
+<td>boolean</td>
+<td>bool</td>
+<td>1</td>
+<td>&nbsp;</td>
+<td>true/false</td>
+</tr>
+<tr class="row-odd"><td>&nbsp;</td>
+<td>bit</td>
+<td>&nbsp;</td>
+<td>1</td>
+<td>&nbsp;</td>
+<td>1/0</td>
+</tr>
+<tr class="row-even"><td>&nbsp;</td>
+<td>varbit</td>
+<td>bit varying</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-odd"><td>O</td>
+<td>tinyint</td>
+<td>int1</td>
+<td>1</td>
+<td>tiny-range integer value</td>
+<td>-2^7 (-128) to 2^7-1 (127)</td>
+</tr>
+<tr class="row-even"><td>O</td>
+<td>smallint</td>
+<td>int2</td>
+<td>2</td>
+<td>small-range integer value</td>
+<td>-2^15 (-32,768) to 2^15-1 (32,767)</td>
+</tr>
+<tr class="row-odd"><td>O</td>
+<td>integer</td>
+<td>int, int4</td>
+<td>4</td>
+<td>integer value</td>
+<td>-2^31 (-2,147,483,648) to 2^31 - 1 (2,147,483,647)</td>
+</tr>
+<tr class="row-even"><td>O</td>
+<td>bigint</td>
+<td>bit varying</td>
+<td>8</td>
+<td>larger range integer value</td>
+<td>-2^63 (-9,223,372,036,854,775,808) to 2^63-1 (9,223,372,036,854,775,807)</td>
+</tr>
+<tr class="row-odd"><td>O</td>
+<td>real</td>
+<td>int8</td>
+<td>4</td>
+<td>variable-precision, inexact, real number value</td>
+<td>-3.4028235E+38 to 3.4028235E+38 (6 decimal digits precision)</td>
+</tr>
+<tr class="row-even"><td>O</td>
+<td>float[(n)]</td>
+<td>float4</td>
+<td>4 or 8</td>
+<td>variable-precision, inexact, real number value</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-odd"><td>O</td>
+<td>double</td>
+<td>float8, double precision</td>
+<td>8</td>
+<td>variable-precision, inexact, real number value</td>
+<td>1 .7E–308 to 1.7E+308 (15 decimal digits precision)</td>
+</tr>
+<tr class="row-even"><td>&nbsp;</td>
+<td>number</td>
+<td>decimal</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-odd"><td>&nbsp;</td>
+<td>char[(n)]</td>
+<td>character</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-even"><td>&nbsp;</td>
+<td>varchar[(n)]</td>
+<td>character varying</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-odd"><td>O</td>
+<td>text</td>
+<td>text</td>
+<td>&nbsp;</td>
+<td>variable-length unicode text</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-even"><td>&nbsp;</td>
+<td>binary</td>
+<td>binary</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-odd"><td>&nbsp;</td>
+<td>varbinary[(n)]</td>
+<td>binary varying</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-even"><td>O</td>
+<td>blob</td>
+<td>bytea</td>
+<td>&nbsp;</td>
+<td>variable-length binary string</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-odd"><td>O</td>
+<td>date</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-even"><td>O</td>
+<td>time</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-odd"><td>&nbsp;</td>
+<td>timetz</td>
+<td>time with time zone</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-even"><td>O</td>
+<td>timestamp</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-odd"><td>&nbsp;</td>
+<td>timestamptz</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+<td>&nbsp;</td>
+</tr>
+<tr class="row-even"><td>O</td>
+<td>inet4</td>
+<td>&nbsp;</td>
+<td>4</td>
+<td>IPv4 address</td>
+<td>&nbsp;</td>
+</tr>
+</tbody>
+</table>
+<div class="section" id="using-real-number-value-real-and-double">
+<h3>Using real number value (real and double)<a class="headerlink" href="#using-real-number-value-real-and-double" title="Permalink to this headline">¶</a></h3>
+<p>The real and double data types are mapped to float and double of java primitives respectively. Java primitives float and double follows the IEEE 754 specification. So, these types are correctly matched to SQL standard data types.</p>
+<ul class="simple">
+<li>float[( n )] is mapped to either float or double according to a given length n. If n is specified, it must be bewtween 1 and 53. The default value of n is 53.</li>
+<li>If 1 &lt;- n &lt;- 24, a value is mapped to float (6 decimal digits precision).</li>
+<li>If 25 &lt;- n &lt;- 53, a value is mapped to double (15 decimal digits precision).</li>
+<li>Do not use approximate real number columns in WHERE clause in order to compare some exact matches, especially the - and &lt;&gt; operators. The &gt; or &lt; comparisons work well.</li>
+</ul>
+</div>
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Added: tajo/site/docs/0.11.1/sql_language/ddl.html
URL: http://svn.apache.org/viewvc/tajo/site/docs/0.11.1/sql_language/ddl.html?rev=1728394&view=auto
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--- tajo/site/docs/0.11.1/sql_language/ddl.html (added)
+++ tajo/site/docs/0.11.1/sql_language/ddl.html Thu Feb  4 00:29:05 2016
@@ -0,0 +1,379 @@
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+<li class="toctree-l2"><a class="reference internal" href="../configuration/tajo-site-xml.html">The tajo-site.xml File</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="../tsql/background_command.html">Executing as background process</a></li>
+</ul>
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+<li class="toctree-l2"><a class="reference internal" href="insert.html">INSERT (OVERWRITE) INTO</a></li>
+<li class="toctree-l2"><a class="reference internal" href="alter_table.html">ALTER TABLE</a></li>
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+<li class="toctree-l1"><a class="reference internal" href="../table_partitioning.html">Table Partitioning</a><ul>
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+<li class="toctree-l2"><a class="reference internal" href="../storage_plugins/postgresql.html">PostgreSQL Storage Handler</a></li>
+</ul>
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+<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#usage">Usage</a></li>
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+</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>
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+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#an-example-jdbc-client">An Example JDBC Client</a></li>
+</ul>
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+<li class="toctree-l1"><a class="reference internal" href="../faq.html">FAQ</a></li>
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+            
+  <div class="section" id="data-definition-language">
+<h1>Data Definition Language<a class="headerlink" href="#data-definition-language" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="create-database">
+<h2>CREATE DATABASE<a class="headerlink" href="#create-database" title="Permalink to this headline">¶</a></h2>
+<p><em>Synopsis</em></p>
+<div class="highlight-sql"><div class="highlight"><pre><span class="k">CREATE</span> <span class="k">DATABASE</span> <span class="p">[</span><span class="n">IF</span> <span class="k">NOT</span> <span class="k">EXISTS</span><span class="p">]</span> <span class="o">&lt;</span><span class="n">database_name</span><span class="o">&gt;</span>
+</pre></div>
+</div>
+<p><em>Description</em></p>
+<p>Database is the namespace in Tajo. A database can contain multiple tables which have unique name in it.
+<code class="docutils literal"><span class="pre">IF</span> <span class="pre">NOT</span> <span class="pre">EXISTS</span></code> allows <code class="docutils literal"><span class="pre">CREATE</span> <span class="pre">DATABASE</span></code> statement to avoid an error which occurs when the database exists.</p>
+</div>
+<div class="section" id="drop-database">
+<h2>DROP DATABASE<a class="headerlink" href="#drop-database" title="Permalink to this headline">¶</a></h2>
+<p><em>Synopsis</em></p>
+<div class="highlight-sql"><div class="highlight"><pre><span class="k">DROP</span> <span class="k">DATABASE</span> <span class="p">[</span><span class="n">IF</span> <span class="k">EXISTS</span><span class="p">]</span> <span class="o">&lt;</span><span class="n">database_name</span><span class="o">&gt;</span>
+</pre></div>
+</div>
+<p><code class="docutils literal"><span class="pre">IF</span> <span class="pre">EXISTS</span></code> allows <code class="docutils literal"><span class="pre">DROP</span> <span class="pre">DATABASE</span></code> statement to avoid an error which occurs when the database does not exist.</p>
+</div>
+<div class="section" id="create-table">
+<h2>CREATE TABLE<a class="headerlink" href="#create-table" title="Permalink to this headline">¶</a></h2>
+<p><em>Synopsis</em></p>
+<div class="highlight-sql"><div class="highlight"><pre><span class="k">CREATE</span> <span class="k">TABLE</span> <span class="p">[</span><span class="n">IF</span> <span class="k">NOT</span> <span class="k">EXISTS</span><span class="p">]</span> <span class="o">&lt;</span><span class="k">table_name</span><span class="o">&gt;</span> <span class="p">[(</span><span class="n">column_list</span><span class="p">)]</span> <span class="p">[</span><span class="n">TABLESPACE</span> <span class="n">tablespace_name</span><span class="p">]</span>
+<span class="p">[</span><span class="k">using</span> <span class="o">&lt;</span><span class="n">storage_type</span><span class="o">&gt;</span> <span class="p">[</span><span class="k">with</span> <span class="p">(</span><span class="o">&lt;</span><span class="k">key</span><span class="o">&gt;</span> <span class="o">=</span> <span class="o">&lt;</span><span class="n">value</span><span class="o">&gt;</span><span class="p">,</span> <span class="p">...)]]</span> <span class="p">[</span><span class="k">AS</span> <span class="o">&lt;</span><span class="n">select_statement</span><span class="o">&gt;</span><span class="p">]</span>
+
+<span class="k">CREATE</span> <span class="k">EXTERNAL</span> <span class="k">TABLE</span> <span class="p">[</span><span class="n">IF</span> <span class="k">NOT</span> <span class="k">EXISTS</span><span class="p">]</span> <span class="o">&lt;</span><span class="k">table_name</span><span class="o">&gt;</span> <span class="p">(</span><span class="n">column_list</span><span class="p">)</span>
+<span class="k">using</span> <span class="o">&lt;</span><span class="n">storage_type</span><span class="o">&gt;</span> <span class="p">[</span><span class="k">with</span> <span class="p">(</span><span class="o">&lt;</span><span class="k">key</span><span class="o">&gt;</span> <span class="o">=</span> <span class="o">&lt;</span><span class="n">value</span><span class="o">&gt;</span><span class="p">,</span> <span class="p">...)]</span> <span class="k">LOCATION</span> <span class="s1">&#39;&lt;path&gt;&#39;</span>
+</pre></div>
+</div>
+<p><em>Description</em></p>
+<p>In Tajo, there are two types of tables, <cite>managed table</cite> and <cite>external table</cite>.
+Managed tables are placed on some predefined tablespaces. The <code class="docutils literal"><span class="pre">TABLESPACE</span></code> clause is to specify a tablespace for this table. For external tables, Tajo allows an arbitrary table location with the <code class="docutils literal"><span class="pre">LOCATION</span></code> clause.
+For more information about tables and tablespace, please refer to <a class="reference internal" href="../table_management/table_overview.html"><em>Overview of Tajo Tables</em></a> and <a class="reference internal" href="../table_management/tablespaces.html"><em>Tablespaces</em></a>.</p>
+<p><code class="docutils literal"><span class="pre">column_list</span></code> is a sequence of the column name and its type like <code class="docutils literal"><span class="pre">&lt;column_name&gt;</span> <span class="pre">&lt;data_type&gt;,</span> <span class="pre">...</span></code>. Additionally, the <cite>asterisk (*)</cite> is allowed for external tables when their data format is <cite>JSON</cite>. You can find more details at <a class="reference internal" href="../table_management/json.html"><em>JSON</em></a>.</p>
+<p><code class="docutils literal"><span class="pre">IF</span> <span class="pre">NOT</span> <span class="pre">EXISTS</span></code> allows <code class="docutils literal"><span class="pre">CREATE</span> <span class="pre">[EXTERNAL]</span> <span class="pre">TABLE</span></code> statement to avoid an error which occurs when the table does not exist.</p>
+<div class="section" id="compression">
+<h3>Compression<a class="headerlink" href="#compression" title="Permalink to this headline">¶</a></h3>
+<p>If you want to add an external table that contains compressed data, you should give &#8216;compression.code&#8217; parameter to CREATE TABLE statement.</p>
+<div class="highlight-sql"><div class="highlight"><pre><span class="k">create</span> <span class="k">EXTERNAL</span> <span class="k">table</span> <span class="n">lineitem</span> <span class="p">(</span>
+<span class="n">L_ORDERKEY</span> <span class="nb">bigint</span><span class="p">,</span>
+<span class="n">L_PARTKEY</span> <span class="nb">bigint</span><span class="p">,</span>
+<span class="p">...</span>
+<span class="n">L_COMMENT</span> <span class="nb">text</span><span class="p">)</span>
+
+<span class="k">USING</span> <span class="nb">TEXT</span> <span class="k">WITH</span> <span class="p">(</span><span class="s1">&#39;text.delimiter&#39;</span><span class="o">=</span><span class="s1">&#39;|&#39;</span><span class="p">,</span><span class="s1">&#39;compression.codec&#39;</span><span class="o">=</span><span class="s1">&#39;org.apache.hadoop.io.compress.SnappyCodec&#39;</span><span class="p">)</span>
+<span class="k">LOCATION</span> <span class="s1">&#39;hdfs://localhost:9010/tajo/warehouse/lineitem_100_snappy&#39;</span><span class="p">;</span>
+</pre></div>
+</div>
+<dl class="docutils">
+<dt><cite>compression.codec</cite> parameter can have one of the following compression codecs:</dt>
+<dd><ul class="first last simple">
+<li>org.apache.hadoop.io.compress.BZip2Codec</li>
+<li>org.apache.hadoop.io.compress.DeflateCodec</li>
+<li>org.apache.hadoop.io.compress.GzipCodec</li>
+<li>org.apache.hadoop.io.compress.SnappyCodec</li>
+</ul>
+</dd>
+</dl>
+</div>
+</div>
+<div class="section" id="drop-table">
+<h2>DROP TABLE<a class="headerlink" href="#drop-table" title="Permalink to this headline">¶</a></h2>
+<p><em>Synopsis</em></p>
+<div class="highlight-sql"><div class="highlight"><pre><span class="k">DROP</span> <span class="k">TABLE</span> <span class="p">[</span><span class="n">IF</span> <span class="k">EXISTS</span><span class="p">]</span> <span class="o">&lt;</span><span class="k">table_name</span><span class="o">&gt;</span> <span class="p">[</span><span class="n">PURGE</span><span class="p">]</span>
+</pre></div>
+</div>
+<p><em>Description</em></p>
+<p><code class="docutils literal"><span class="pre">IF</span> <span class="pre">EXISTS</span></code> allows <code class="docutils literal"><span class="pre">DROP</span> <span class="pre">DATABASE</span></code> statement to avoid an error which occurs when the database does not exist. <code class="docutils literal"><span class="pre">DROP</span> <span class="pre">TABLE</span></code> statement removes a table from Tajo catalog, but it does not remove the contents. If <code class="docutils literal"><span class="pre">PURGE</span></code> option is given, <code class="docutils literal"><span class="pre">DROP</span> <span class="pre">TABLE</span></code> statement will eliminate the entry in the catalog as well as the contents.</p>
+</div>
+<div class="section" id="create-index">
+<h2>CREATE INDEX<a class="headerlink" href="#create-index" title="Permalink to this headline">¶</a></h2>
+<p><em>Synopsis</em></p>
+<div class="highlight-sql"><div class="highlight"><pre>CREATE INDEX [ name ] ON table_name [ USING method ]
+( { column_name | ( expression ) } [ ASC | DESC ] [ NULLS { FIRST | LAST } ] [, ...] )
+[ WHERE predicate ]
+</pre></div>
+</div>
+<p><em>Description</em></p>
+<p>Tajo supports index for fast data retrieval. Currently, index is supported for only plain <code class="docutils literal"><span class="pre">TEXT</span></code> formats stored on <code class="docutils literal"><span class="pre">HDFS</span></code>.
+For more information, please refer to <a class="reference internal" href="../index_overview.html"><em>Index (Experimental Feature)</em></a>.</p>
+<div class="section" id="index-method">
+<h3>Index method<a class="headerlink" href="#index-method" title="Permalink to this headline">¶</a></h3>
+<p>Currently, Tajo supports only one type of index.</p>
+<dl class="docutils">
+<dt>Index methods:</dt>
+<dd><ul class="first last simple">
+<li>TWO_LEVEL_BIN_TREE: This method is used by default in Tajo. For more information about its structure, please refer to <a class="reference internal" href="../index/types.html"><em>Index Types</em></a>.</li>
+</ul>
+</dd>
+</dl>
+</div>
+</div>
+<div class="section" id="drop-index">
+<h2>DROP INDEX<a class="headerlink" href="#drop-index" title="Permalink to this headline">¶</a></h2>
+<p><em>Synopsis</em></p>
+<div class="highlight-sql"><div class="highlight"><pre><span class="k">DROP</span> <span class="k">INDEX</span> <span class="n">name</span>
+</pre></div>
+</div>
+</div>
+</div>
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