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>PostgreSQL 7.4.1 Documentation</TH
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><H1
><A
NAME="APP-CLUSTERDB"
></A
><SPAN
CLASS="APPLICATION"
>clusterdb</SPAN
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN43052"
></A
><H2
>Name</H2
>clusterdb -- cluster a <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> database</DIV
><A
NAME="AEN43056"
></A
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN43058"
></A
><H2
>Synopsis</H2
><P
><TT
CLASS="COMMAND"
>clusterdb</TT
> [<VAR
CLASS="REPLACEABLE"
>connection-option</VAR
>...] [--table | -t <VAR
CLASS="REPLACEABLE"
>table</VAR
> ] [<VAR
CLASS="REPLACEABLE"
>dbname</VAR
>]<BR><TT
CLASS="COMMAND"
>clusterdb</TT
> [<VAR
CLASS="REPLACEABLE"
>connection-option</VAR
>...] [--all | -a]</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN43074"
></A
><H2
>Description</H2
><P
> <SPAN
CLASS="APPLICATION"
>clusterdb</SPAN
> is a utility for reclustering tables
in a <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> database. It finds tables
that have previously been clustered, and clusters them again on the same
index that was last used. Tables that have never been clustered are not
affected.
</P
><P
> <SPAN
CLASS="APPLICATION"
>clusterdb</SPAN
> is a wrapper around the SQL
command <A
HREF="sql-cluster.html"
><I
>CLUSTER</I
></A
>.
There is no effective difference between clustering databases via
this utility and via other methods for accessing the server.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN43082"
></A
><H2
>Options</H2
><P
> <SPAN
CLASS="APPLICATION"
>clusterdb</SPAN
> accepts the following command-line arguments:
<P
></P
></P><DIV
CLASS="VARIABLELIST"
><DL
><DT
><VAR
CLASS="OPTION"
>-a</VAR
><BR><VAR
CLASS="OPTION"
>--all</VAR
></DT
><DD
><P
> Cluster all databases.
</P
></DD
><DT
><VAR
CLASS="OPTION"
>[<SPAN
CLASS="OPTIONAL"
>-d</SPAN
>] <VAR
CLASS="REPLACEABLE"
>dbname</VAR
></VAR
><BR><VAR
CLASS="OPTION"
>[<SPAN
CLASS="OPTIONAL"
>--dbname</SPAN
>] <VAR
CLASS="REPLACEABLE"
>dbname</VAR
></VAR
></DT
><DD
><P
> Specifies the name of the database to be clustered.
If this is not specified and <VAR
CLASS="OPTION"
>-a</VAR
> (or
<VAR
CLASS="OPTION"
>--all</VAR
>) is not used, the database name is read
from the environment variable <TT
CLASS="ENVAR"
>PGDATABASE</TT
>. If
that is not set, the user name specified for the connection is
used.
</P
></DD
><DT
><VAR
CLASS="OPTION"
>-e</VAR
><BR><VAR
CLASS="OPTION"
>--echo</VAR
></DT
><DD
><P
> Echo the commands that <SPAN
CLASS="APPLICATION"
>clusterdb</SPAN
> generates
and sends to the server.
</P
></DD
><DT
><VAR
CLASS="OPTION"
>-q</VAR
><BR><VAR
CLASS="OPTION"
>--quiet</VAR
></DT
><DD
><P
> Do not display a response.
</P
></DD
><DT
><VAR
CLASS="OPTION"
>-t <VAR
CLASS="REPLACEABLE"
>table</VAR
></VAR
><BR><VAR
CLASS="OPTION"
>--table <VAR
CLASS="REPLACEABLE"
>table</VAR
></VAR
></DT
><DD
><P
> Cluster <VAR
CLASS="REPLACEABLE"
>table</VAR
> only.
</P
></DD
></DL
></DIV
><P>
</P
><P
> <SPAN
CLASS="APPLICATION"
>clusterdb</SPAN
> also accepts
the following command-line arguments for connection parameters:
<P
></P
></P><DIV
CLASS="VARIABLELIST"
><DL
><DT
><VAR
CLASS="OPTION"
>-h <VAR
CLASS="REPLACEABLE"
>host</VAR
></VAR
><BR><VAR
CLASS="OPTION"
>--host <VAR
CLASS="REPLACEABLE"
>host</VAR
></VAR
></DT
><DD
><P
> Specifies the host name of the machine on which the server is
running. If the value begins with a slash, it is used as the
directory for the Unix domain socket.
</P
></DD
><DT
><VAR
CLASS="OPTION"
>-p <VAR
CLASS="REPLACEABLE"
>port</VAR
></VAR
><BR><VAR
CLASS="OPTION"
>--port <VAR
CLASS="REPLACEABLE"
>port</VAR
></VAR
></DT
><DD
><P
> Specifies the TCP port or local Unix domain socket file
extension on which the server
is listening for connections.
</P
></DD
><DT
><VAR
CLASS="OPTION"
>-U <VAR
CLASS="REPLACEABLE"
>username</VAR
></VAR
><BR><VAR
CLASS="OPTION"
>--username <VAR
CLASS="REPLACEABLE"
>username</VAR
></VAR
></DT
><DD
><P
> User name to connect as.
</P
></DD
><DT
><VAR
CLASS="OPTION"
>-W</VAR
><BR><VAR
CLASS="OPTION"
>--password</VAR
></DT
><DD
><P
> Force password prompt.
</P
></DD
></DL
></DIV
><P>
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN43170"
></A
><H2
>Environment</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="ENVAR"
>PGDATABASE</TT
><BR><TT
CLASS="ENVAR"
>PGHOST</TT
><BR><TT
CLASS="ENVAR"
>PGPORT</TT
><BR><TT
CLASS="ENVAR"
>PGUSER</TT
></DT
><DD
><P
> Default connection parameters
</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN43184"
></A
><H2
>Diagnostics</H2
><P
> In case of difficulty, see <A
HREF="sql-cluster.html"
><I
>CLUSTER</I
></A
> and <A
HREF="app-psql.html"
><SPAN
CLASS="APPLICATION"
>psql</SPAN
></A
> for
discussions of potential problems and error messages.
The database server must be running at the
targeted host. Also, any default connection settings and environment
variables used by the <SPAN
CLASS="APPLICATION"
>libpq</SPAN
> front-end
library will apply.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN43190"
></A
><H2
>Examples</H2
><P
> To cluster the database <TT
CLASS="LITERAL"
>test</TT
>:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$ </SAMP
><KBD
CLASS="USERINPUT"
>clusterdb test</KBD
></PRE
><P>
</P
><P
> To cluster a single table
<TT
CLASS="LITERAL"
>foo</TT
> in a database named
<TT
CLASS="LITERAL"
>xyzzy</TT
>:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$ </SAMP
><KBD
CLASS="USERINPUT"
>clusterdb --table foo xyzzy</KBD
></PRE
><P>
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN43203"
></A
><H2
>See Also</H2
><A
HREF="sql-cluster.html"
><I
>CLUSTER</I
></A
></DIV
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