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documentation" href="index.html"/> + <link rel="next" title="Data Model" href="sql_language/data_model.html"/> + <link rel="prev" title="Executing as background process" href="tsql/background_command.html"/> + + + <script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js";></script> + +</head> + +<body class="wy-body-for-nav" role="document"> + + <div class="wy-grid-for-nav"> + + + <nav data-toggle="wy-nav-shift" class="wy-nav-side"> + <div class="wy-side-nav-search"> + <a href="index.html" class="fa fa-home"> Apache Tajo</a> + <div role="search"> + <form id ="rtd-search-form" class="wy-form" action="search.html" method="get"> + <input type="text" name="q" placeholder="Search docs" /> + <input type="hidden" name="check_keywords" value="yes" /> + <input type="hidden" name="area" value="default" /> + </form> +</div> + </div> + + <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation"> + + + <ul class="current"> +<li 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href="functions/math_func_and_operators.html">Math Functions and Operators</a></li> +<li class="toctree-l2"><a class="reference internal" href="functions/string_func_and_operators.html">String Functions and Operators</a></li> +<li class="toctree-l2"><a class="reference internal" href="functions/datetime_func_and_operators.html">DateTime Functions and Operators</a></li> +<li class="toctree-l2"><a class="reference internal" href="functions/network_func_and_operators.html">Network Functions and Operators</a></li> +<li class="toctree-l2"><a class="reference internal" href="functions/json_func.html">JSON 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/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"><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> +</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="hcatalog_integration.html">HCatalog 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#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 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Added: tajo/site/docs/0.10.1/sql_language/data_model.html URL: http://svn.apache.org/viewvc/tajo/site/docs/0.10.1/sql_language/data_model.html?rev=1688350&view=auto ============================================================================== --- tajo/site/docs/0.10.1/sql_language/data_model.html (added) +++ tajo/site/docs/0.10.1/sql_language/data_model.html Tue Jun 30 04:16:52 2015 @@ -0,0 +1,465 @@ + + +<!DOCTYPE html> +<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> +<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> +<head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1.0"> + + <title>Data Model — Apache Tajo 0.11.0 documentation</title> + + + + + + + <link href='https://fonts.googleapis.com/css?family=Lato:400,700|Roboto+Slab:400,700|Inconsolata:400,700' rel='stylesheet' type='text/css'> + + + + + + + + + + <link rel="stylesheet" href="../_static/css/theme.css" type="text/css" /> + + + + <link rel="top" title="Apache Tajo 0.11.0 documentation" href="../index.html"/> + <link rel="up" title="SQL Language" href="../sql_language.html"/> + <link rel="next" title="Data Definition Language" href="ddl.html"/> + <link rel="prev" title="SQL Language" href="../sql_language.html"/> + + + <script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js";></script> + +</head> + +<body class="wy-body-for-nav" role="document"> + + <div class="wy-grid-for-nav"> + + + <nav data-toggle="wy-nav-shift" class="wy-nav-side"> + <div class="wy-side-nav-search"> + <a href="../index.html" class="fa fa-home"> Apache Tajo</a> + <div role="search"> + <form id ="rtd-search-form" class="wy-form" action="../search.html" method="get"> + <input type="text" name="q" placeholder="Search docs" /> + <input type="hidden" name="check_keywords" value="yes" /> + <input type="hidden" name="area" value="default" /> + </form> +</div> + </div> + + <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation"> + + + <ul class="current"> +<li class="toctree-l1"><a class="reference internal" href="../introduction.html">Introduction</a></li> +<li class="toctree-l1"><a class="reference internal" href="../getting_started.html">Getting Started</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#prerequisites">Prerequisites</a></li> +<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#dowload-and-unpack-the-source-code">Dowload and unpack the source code</a></li> +<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#build-source-code">Build source code</a></li> +<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#setting-up-a-local-tajo-cluster">Setting up a local Tajo cluster</a></li> +<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#first-query-execution">First query execution</a></li> +</ul> +</li> +<li class="toctree-l1"><a class="reference internal" href="../configuration.html">Configuration</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../configuration/preliminary.html">Preliminary</a></li> +<li class="toctree-l2"><a class="reference internal" href="../configuration/cluster_setup.html">Cluster Setup</a></li> +<li class="toctree-l2"><a class="reference internal" href="../configuration/tajo_master_configuration.html">Tajo Master Configuration</a></li> +<li class="toctree-l2"><a class="reference internal" href="../configuration/worker_configuration.html">Worker Configuration</a></li> +<li class="toctree-l2"><a class="reference internal" href="../configuration/catalog_configuration.html">Catalog Configuration</a></li> +<li class="toctree-l2"><a class="reference internal" href="../configuration/ha_configuration.html">High Availability for TajoMaster</a></li> +<li class="toctree-l2"><a class="reference internal" href="../configuration/service_config_defaults.html">Cluster Service Configuration Defaults</a></li> +<li class="toctree-l2"><a class="reference internal" href="../configuration/tajo-site-xml.html">The tajo-site.xml File</a></li> +<li class="toctree-l2"><a class="reference internal" href="../configuration/catalog-site-xml.html">The catalog-site.xml File</a></li> +</ul> +</li> +<li class="toctree-l1"><a class="reference internal" href="../tsql.html">Tajo Shell (TSQL)</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../tsql/meta_command.html">Meta Commands</a></li> +<li class="toctree-l2"><a class="reference internal" href="../tsql/dfs_command.html">Executing HDFS commands</a></li> +<li class="toctree-l2"><a class="reference internal" href="../tsql/variables.html">Session Variables</a></li> +<li class="toctree-l2"><a class="reference internal" href="../tsql/admin_command.html">Administration Commands</a></li> +<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="queries.html">Queries</a></li> +<li 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internal" href="../functions.html">Functions</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../functions/math_func_and_operators.html">Math Functions and Operators</a></li> +<li class="toctree-l2"><a class="reference internal" href="../functions/string_func_and_operators.html">String Functions and Operators</a></li> +<li class="toctree-l2"><a class="reference internal" href="../functions/datetime_func_and_operators.html">DateTime Functions and Operators</a></li> +<li class="toctree-l2"><a class="reference internal" href="../functions/network_func_and_operators.html">Network Functions and Operators</a></li> +<li class="toctree-l2"><a class="reference internal" href="../functions/json_func.html">JSON 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 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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="../hcatalog_integration.html">HCatalog 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#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="../sql_language.html">SQL Language</a> »</li> + + <li>Data Model</li> + <li class="wy-breadcrumbs-aside"> + + <a href="../_sources/sql_language/data_model.txt" rel="nofollow"> View page source</a> + + </li> + </ul> + <hr/> +</div> + <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> </td> +<td>true/false</td> +</tr> +<tr class="row-odd"><td> </td> +<td>bit</td> +<td> </td> +<td>1</td> +<td> </td> +<td>1/0</td> +</tr> +<tr class="row-even"><td> </td> +<td>varbit</td> +<td>bit varying</td> +<td> </td> +<td> </td> +<td> </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> </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 .7Eâ308 to 1.7E+308 (15 decimal digits precision)</td> +</tr> +<tr class="row-even"><td> </td> +<td>number</td> +<td>decimal</td> +<td> </td> +<td> </td> +<td> </td> +</tr> +<tr class="row-odd"><td> </td> +<td>char[(n)]</td> +<td>character</td> +<td> </td> +<td> </td> +<td> </td> +</tr> +<tr class="row-even"><td> </td> +<td>varchar[(n)]</td> +<td>character varying</td> +<td> </td> +<td> </td> +<td> </td> +</tr> +<tr class="row-odd"><td>O</td> +<td>text</td> +<td>text</td> +<td> </td> +<td>variable-length unicode text</td> +<td> </td> +</tr> +<tr class="row-even"><td> </td> +<td>binary</td> +<td>binary</td> +<td> </td> +<td> </td> +<td> </td> +</tr> +<tr class="row-odd"><td> </td> +<td>varbinary[(n)]</td> +<td>binary varying</td> +<td> </td> +<td> </td> +<td> </td> +</tr> +<tr class="row-even"><td>O</td> +<td>blob</td> +<td>bytea</td> +<td> </td> +<td>variable-length binary string</td> +<td> </td> +</tr> +<tr class="row-odd"><td>O</td> +<td>date</td> +<td> </td> +<td> </td> +<td> </td> +<td> </td> +</tr> +<tr class="row-even"><td>O</td> +<td>time</td> +<td> </td> +<td> </td> +<td> </td> +<td> </td> +</tr> +<tr class="row-odd"><td> </td> +<td>timetz</td> +<td>time with time zone</td> +<td> </td> +<td> </td> +<td> </td> +</tr> +<tr class="row-even"><td>O</td> +<td>timestamp</td> +<td> </td> +<td> </td> +<td> </td> +<td> </td> +</tr> +<tr class="row-odd"><td> </td> +<td>timestamptz</td> +<td> </td> +<td> </td> +<td> </td> +<td> </td> +</tr> +<tr class="row-even"><td>O</td> +<td>inet4</td> +<td> </td> +<td>4</td> +<td>IPv4 address</td> +<td> </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 <- n <- 24, a value is mapped to float (6 decimal digits precision).</li> +<li>If 25 <- n <- 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 <> operators. The > or < comparisons work well.</li> +</ul> +</div> +</div> +</div> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="ddl.html" class="btn btn-neutral float-right" title="Data Definition Language"/>Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="../sql_language.html" class="btn btn-neutral" title="SQL Language"><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 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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="../sql_language.html">SQL Language</a> »</li> + + <li>Data Definition Language</li> + <li class="wy-breadcrumbs-aside"> + + <a href="../_sources/sql_language/ddl.txt" rel="nofollow"> View page source</a> + + </li> + </ul> + <hr/> +</div> + <div role="main"> + + <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"><</span><span class="n">database_name</span><span class="o">></span> +</pre></div> +</div> +<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">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"><</span><span class="n">database_name</span><span class="o">></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"><</span><span class="k">table_name</span><span class="o">></span> <span class="p">[(</span><span class="o"><</span><span class="k">column_name</span><span class="o">></span> <span class="o"><</span><span class="n">data_type</span><span class="o">></span><span class="p">,</span> <span class="p">...</span> <span class="p">)]</span> +<span class="p">[</span><span class="k">using</span> <span class="o"><</span><span class="n">storage_type</span><span class="o">></span> <span class="p">[</span><span class="k">with</span> <span class="p">(</span><span class="o"><</span><span class="k">key</span><span class="o">></span> <span class="o">=</span> <span class="o"><</span><span class="n">value</span><span class="o">></span><span class="p">,</span> <span class="p">...)]]</span> <span class="p">[</span><span class="k">AS</span> <span class="o"><</span><span class="n">select_statement</span><span class="o">></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"><</span><span class="k">table_name</span><span class="o">></span> <span class="p">(</span><span class="o"><</span><span class="k">column_name</span><span class="o">></span> <span class="o"><</span><span class="n">data_type</span><span class="o">></span><span class="p">,</span> <span class="p">...</span> <span class="p">)</span> +<span class="k">using</span> <span class="o"><</span><span class="n">storage_type</span><span class="o">></span> <span class="p">[</span><span class="k">with</span> <span class="p">(</span><span class="o"><</span><span class="k">key</span><span class="o">></span> <span class="o">=</span> <span class="o"><</span><span class="n">value</span><span class="o">></span><span class="p">,</span> <span class="p">...)]</span> <span class="k">LOCATION</span> <span class="s1">'<path>'</span> +</pre></div> +</div> +<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 ‘compression.code’ 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">'text.delimiter'</span><span class="o">=</span><span class="s1">'|'</span><span class="p">,</span><span class="s1">'compression.codec'</span><span class="o">=</span><span class="s1">'org.apache.hadoop.io.compress.DeflateCodec'</span><span class="p">)</span> +<span class="k">LOCATION</span> <span class="s1">'hdfs://localhost:9010/tajo/warehouse/lineitem_100_snappy'</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"><</span><span class="k">table_name</span><span class="o">></span> <span class="p">[</span><span class="n">PURGE</span><span class="p">]</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. <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> +<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> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="insert.html" class="btn btn-neutral float-right" title="INSERT (OVERWRITE) INTO"/>Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="data_model.html" class="btn btn-neutral" title="Data Model"><span class="fa fa-arrow-circle-left"></span> Previous</a> + + </div> + + + <hr/> + + <div role="contentinfo"> + <p> + © Copyright 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Tajo’s INSERT OVERWRITE statement follows <code class="docutils literal"><span class="pre">INSERT</span> <span class="pre">INTO</span> <span class="pre">SELECT</span></code> statement of SQL. The examples are as follows:</p> +<div class="highlight-sql"><div class="highlight"><pre><span class="k">create</span> <span class="k">table</span> <span class="n">t1</span> <span class="p">(</span><span class="n">col1</span> <span class="nb">int8</span><span class="p">,</span> <span class="n">col2</span> <span class="n">int4</span><span class="p">,</span> <span class="n">col3</span> <span class="n">float8</span><span class="p">);</span> + +<span class="c1">-- when a target table schema and output schema are equivalent to each other</span> +<span class="k">INSERT</span> <span class="n">OVERWRITE</span> <span class="k">INTO</span> <span class="n">t1</span> <span class="k">SELECT</span> <span class="n">l_orderkey</span><span class="p">,</span> <span class="n">l_partkey</span><span class="p">,</span> <span class="n">l_quantity</span> <span class="k">FROM</span> <span class="n">lineitem</span><span class="p">;</span> +<span class="c1">-- or</span> +<span class="k">INSERT</span> <span class="n">OVERWRITE</span> <span class="k">INTO</span> <span class="n">t1</span> <span class="k">SELECT</span> <span class="o">*</span> <span class="k">FROM</span> <span class="n">lineitem</span><span class="p">;</span> + +<span class="c1">-- when the output schema are smaller than the target table schema</span> +<span class="k">INSERT</span> <span class="n">OVERWRITE</span> <span class="k">INTO</span> <span class="n">t1</span> <span class="k">SELECT</span> <span class="n">l_orderkey</span> <span class="k">FROM</span> <span class="n">lineitem</span><span class="p">;</span> + +<span class="c1">-- when you want to specify certain target columns</span> +<span class="k">INSERT</span> <span class="n">OVERWRITE</span> <span class="k">INTO</span> <span class="n">t1</span> <span class="p">(</span><span class="n">col1</span><span class="p">,</span> <span class="n">col3</span><span class="p">)</span> <span class="k">SELECT</span> <span class="n">l_orderkey</span><span class="p">,</span> <span class="n">l_quantity</span> <span class="k">FROM</span> <span class="n">lineitem</span><span class="p">;</span> +</pre></div> +</div> +<p>In addition, INSERT OVERWRITE statement overwrites table data as well as a specific directory.</p> +<div class="highlight-sql"><div class="highlight"><pre><span class="k">INSERT</span> <span class="n">OVERWRITE</span> <span class="k">INTO</span> <span class="k">LOCATION</span> <span class="s1">'/dir/subdir'</span> <span class="k">SELECT</span> <span class="n">l_orderkey</span><span class="p">,</span> <span class="n">l_quantity</span> <span class="k">FROM</span> <span class="n">lineitem</span><span class="p">;</span> +</pre></div> +</div> +</div> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="queries.html" class="btn btn-neutral float-right" title="Queries"/>Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="ddl.html" class="btn btn-neutral" title="Data Definition Language"><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
