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Green_GoodERP18_FSJ_Standard/PostgreSQL/doc/postgresql/html/app-clusterdb.html

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  1. <?xml version="1.0" encoding="UTF-8" standalone="no"?>

  2. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>clusterdb</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="prev" href="reference-client.html" title="PostgreSQL Client Applications" /><link rel="next" href="app-createdb.html" title="createdb" /></head><body><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center"><span xmlns="http://www.w3.org/1999/xhtml" class="application">clusterdb</span></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="reference-client.html" title="PostgreSQL Client Applications">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="reference-client.html" title="PostgreSQL Client Applications">Up</a></td><th width="60%" align="center">PostgreSQL Client Applications</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 12.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="app-createdb.html" title="createdb">Next</a></td></tr></table><hr></hr></div><div class="refentry" id="APP-CLUSTERDB"><div class="titlepage"></div><a id="id-1.9.4.3.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle"><span class="application">clusterdb</span></span></h2><p>clusterdb — cluster a <span class="productname">PostgreSQL</span> database</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p id="id-1.9.4.3.4.1"><code class="command">clusterdb</code> [<em class="replaceable"><code>connection-option</code></em>...] [ <code class="option">--verbose</code>  |   <code class="option">-v</code> ]  

  3.      [

  4.          <code class="option">--table</code>  |   <code class="option">-t</code>  

  5.        <em class="replaceable"><code>table</code></em>

  6.      ]

  7.    ...  [<em class="replaceable"><code>dbname</code></em>]</p></div><div class="cmdsynopsis"><p id="id-1.9.4.3.4.2"><code class="command">clusterdb</code> [<em class="replaceable"><code>connection-option</code></em>...] [ <code class="option">--verbose</code>  |   <code class="option">-v</code> ]   <code class="option">--all</code>  |   <code class="option">-a</code>  </p></div></div><div class="refsect1" id="id-1.9.4.3.5"><h2>Description</h2><p>

  8.    <span class="application">clusterdb</span> is a utility for reclustering tables

  9.    in a <span class="productname">PostgreSQL</span> database.  It finds tables

  10.    that have previously been clustered, and clusters them again on the same

  11.    index that was last used.  Tables that have never been clustered are not

  12.    affected.

  13.   </p><p>

  14.    <span class="application">clusterdb</span> is a wrapper around the SQL

  15.    command <a class="xref" href="sql-cluster.html" title="CLUSTER"><span class="refentrytitle">CLUSTER</span></a>.

  16.    There is no effective difference between clustering databases via

  17.    this utility and via other methods for accessing the server.

  18.   </p></div><div class="refsect1" id="id-1.9.4.3.6"><h2>Options</h2><p>

  19.     <span class="application">clusterdb</span> accepts the following command-line arguments:

  20. 

  21.     </p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="option">-a</code><br /></span><span class="term"><code class="option">--all</code></span></dt><dd><p>

  22.         Cluster all databases.

  23.        </p></dd><dt><span class="term"><code class="option">[<span class="optional">-d</span>] <em class="replaceable"><code>dbname</code></em></code><br /></span><span class="term"><code class="option">[<span class="optional">--dbname=</span>]<em class="replaceable"><code>dbname</code></em></code></span></dt><dd><p>

  24.         Specifies the name of the database to be clustered.

  25.         If this is not specified and <code class="option">-a</code> (or

  26.         <code class="option">--all</code>) is not used, the database name is read

  27.         from the environment variable <code class="envar">PGDATABASE</code>.  If

  28.         that is not set, the user name specified for the connection is

  29.         used.

  30.        </p></dd><dt><span class="term"><code class="option">-e</code><br /></span><span class="term"><code class="option">--echo</code></span></dt><dd><p>

  31.         Echo the commands that <span class="application">clusterdb</span> generates

  32.         and sends to the server.

  33.        </p></dd><dt><span class="term"><code class="option">-q</code><br /></span><span class="term"><code class="option">--quiet</code></span></dt><dd><p>

  34.         Do not display progress messages.

  35.        </p></dd><dt><span class="term"><code class="option">-t <em class="replaceable"><code>table</code></em></code><br /></span><span class="term"><code class="option">--table=<em class="replaceable"><code>table</code></em></code></span></dt><dd><p>

  36.         Cluster <em class="replaceable"><code>table</code></em> only.

  37.         Multiple tables can be clustered by writing multiple

  38.         <code class="option">-t</code> switches.

  39.        </p></dd><dt><span class="term"><code class="option">-v</code><br /></span><span class="term"><code class="option">--verbose</code></span></dt><dd><p>

  40.         Print detailed information during processing.

  41.        </p></dd><dt><span class="term"><code class="option">-V</code><br /></span><span class="term"><code class="option">--version</code></span></dt><dd><p>

  42.       Print the <span class="application">clusterdb</span> version and exit.

  43.       </p></dd><dt><span class="term"><code class="option">-?</code><br /></span><span class="term"><code class="option">--help</code></span></dt><dd><p>

  44.       Show help about <span class="application">clusterdb</span> command line

  45.       arguments, and exit.

  46.       </p></dd></dl></div><p>

  47.    </p><p>

  48.     <span class="application">clusterdb</span> also accepts

  49.     the following command-line arguments for connection parameters:

  50. 

  51.     </p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="option">-h <em class="replaceable"><code>host</code></em></code><br /></span><span class="term"><code class="option">--host=<em class="replaceable"><code>host</code></em></code></span></dt><dd><p>

  52.         Specifies the host name of the machine on which the server is

  53.         running.  If the value begins with a slash, it is used as the

  54.         directory for the Unix domain socket.

  55.        </p></dd><dt><span class="term"><code class="option">-p <em class="replaceable"><code>port</code></em></code><br /></span><span class="term"><code class="option">--port=<em class="replaceable"><code>port</code></em></code></span></dt><dd><p>

  56.         Specifies the TCP port or local Unix domain socket file

  57.         extension on which the server

  58.         is listening for connections.

  59.        </p></dd><dt><span class="term"><code class="option">-U <em class="replaceable"><code>username</code></em></code><br /></span><span class="term"><code class="option">--username=<em class="replaceable"><code>username</code></em></code></span></dt><dd><p>

  60.         User name to connect as.

  61.        </p></dd><dt><span class="term"><code class="option">-w</code><br /></span><span class="term"><code class="option">--no-password</code></span></dt><dd><p>

  62.         Never issue a password prompt.  If the server requires

  63.         password authentication and a password is not available by

  64.         other means such as a <code class="filename">.pgpass</code> file, the

  65.         connection attempt will fail.  This option can be useful in

  66.         batch jobs and scripts where no user is present to enter a

  67.         password.

  68.        </p></dd><dt><span class="term"><code class="option">-W</code><br /></span><span class="term"><code class="option">--password</code></span></dt><dd><p>

  69.         Force <span class="application">clusterdb</span> to prompt for a

  70.         password before connecting to a database.

  71.        </p><p>

  72.         This option is never essential, since

  73.         <span class="application">clusterdb</span> will automatically prompt

  74.         for a password if the server demands password authentication.

  75.         However, <span class="application">clusterdb</span> will waste a

  76.         connection attempt finding out that the server wants a password.

  77.         In some cases it is worth typing <code class="option">-W</code> to avoid the extra

  78.         connection attempt.

  79.        </p></dd><dt><span class="term"><code class="option">--maintenance-db=<em class="replaceable"><code>dbname</code></em></code></span></dt><dd><p>

  80.          Specifies the name of the database to connect to discover what other

  81.          databases should be clustered. If not specified, the

  82.          <code class="literal">postgres</code> database will be used,

  83.          and if that does not exist, <code class="literal">template1</code> will be used.

  84.        </p></dd></dl></div><p>

  85.    </p></div><div class="refsect1" id="id-1.9.4.3.7"><h2>Environment</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="envar">PGDATABASE</code><br /></span><span class="term"><code class="envar">PGHOST</code><br /></span><span class="term"><code class="envar">PGPORT</code><br /></span><span class="term"><code class="envar">PGUSER</code></span></dt><dd><p>

  86.       Default connection parameters

  87.      </p></dd><dt><span class="term"><code class="envar">PG_COLOR</code></span></dt><dd><p>

  88.       Specifies whether to use color in diagnostic messages. Possible values

  89.       are <code class="literal">always</code>, <code class="literal">auto</code> and

  90.       <code class="literal">never</code>.

  91.      </p></dd></dl></div><p>

  92.    This utility, like most other <span class="productname">PostgreSQL</span> utilities,

  93.    also uses the environment variables supported by <span class="application">libpq</span>

  94.    (see <a class="xref" href="libpq-envars.html" title="33.14. Environment Variables">Section 33.14</a>).

  95.   </p></div><div class="refsect1" id="id-1.9.4.3.8"><h2>Diagnostics</h2><p>

  96.    In case of difficulty, see <a class="xref" href="sql-cluster.html" title="CLUSTER"><span class="refentrytitle">CLUSTER</span></a>

  97.    and <a class="xref" href="app-psql.html" title="psql"><span class="refentrytitle"><span class="application">psql</span></span></a> for

  98.    discussions of potential problems and error messages.

  99.    The database server must be running at the

  100.    targeted host.  Also, any default connection settings and environment

  101.    variables used by the <span class="application">libpq</span> front-end

  102.    library will apply.

  103.   </p></div><div class="refsect1" id="id-1.9.4.3.9"><h2>Examples</h2><p>

  104.     To cluster the database <code class="literal">test</code>:

  105. </p><pre class="screen">

  106. <code class="prompt">$ </code><strong class="userinput"><code>clusterdb test</code></strong>

  107. </pre><p>

  108.    </p><p>

  109.     To cluster a single table

  110.     <code class="literal">foo</code> in a database named

  111.     <code class="literal">xyzzy</code>:

  112. </p><pre class="screen">

  113. <code class="prompt">$ </code><strong class="userinput"><code>clusterdb --table=foo xyzzy</code></strong>

  114. </pre></div><div class="refsect1" id="id-1.9.4.3.10"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-cluster.html" title="CLUSTER"><span class="refentrytitle">CLUSTER</span></a></span></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="reference-client.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="reference-client.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="app-createdb.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">PostgreSQL Client Applications </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span class="application">createdb</span></td></tr></table></div></body></html>
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