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<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/droplang.sgml,v 1.3 2000/03/27 17:14:43 thomas Exp $
Postgres documentation
-->
<refentry id="APP-DROPLANG">
<refmeta>
<refentrytitle id="APP-DROPLANG-TITLE">
<application>droplang</application>
</refentrytitle>
<refmiscinfo>Application</refmiscinfo>
</refmeta>
<refnamediv>
<refname id="droplang">
<application>droplang</application>
</refname>
<refpurpose>
Remove a programming language from a <productname>Postgres</productname> database
</refpurpose>
</refnamediv>
<refsynopsisdiv>
<refsynopsisdivinfo>
<date>1999-12-05</date>
</refsynopsisdivinfo>
<synopsis>
droplang [ <replaceable class="parameter">connection options</replaceable> ] [ <replaceable class="parameter">langname</replaceable> [ <replaceable class="parameter">dbname</replaceable> ] ]
droplang [ <replaceable class="parameter">connection options</replaceable> ] --list|-l
</synopsis>
<refsect2 id="R2-APP-DROPLANG-1">
<title>
Inputs
</title>
<para>
<application>droplang</application> accepts the following command line arguments:
<variablelist>
<varlistentry>
<term><replaceable class="parameter">langname</replaceable></term>
<listitem>
<para>
Specifies the name of the backend programming language to be removed.
<application>droplang</application> will prompt for
<replaceable class="parameter">langname</replaceable>
if it is not specified on the command line.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>[-d, --dbname] <replaceable class="parameter">dbname</replaceable></term>
<listitem>
<para>
Specifies from which database the language should be removed.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-l, --list</term>
<listitem>
<para>
Shows a list of already installed languages in the target database
(which must be specified).
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
<para>
<application>droplang</application> also accepts
the following command line arguments for connection parameters:
<variablelist>
<varlistentry>
<term>-h, --host <replaceable class="parameter">host</replaceable></term>
<listitem>
<para>
Specifies the hostname of the machine on which the
<application>postmaster</application>
is running.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-p, --port <replaceable class="parameter">port</replaceable></term>
<listitem>
<para>
Specifies the Internet TCP/IP port or local Unix domain socket file
extension on which the <application>postmaster</application>
is listening for connections.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-U, --username <replaceable class="parameter">username</replaceable></term>
<listitem>
<para>
Username to connect as.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-W, --password</term>
<listitem>
<para>
Force password prompt.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect2>
<refsect2 id="R2-APP-DROPLANG-2">
<refsect2info>
<date>1999-12-05</date>
</refsect2info>
<title>
Outputs
</title>
<para>
Most error messages are self-explanatory. If not, run
<application>droplang</application> with the <option>--echo</option>
option and see under the respective <acronym>SQL</acronym> command
for details. Check also under <xref linkend="APP-PSQL" endterm="APP-PSQL-title">
for more possibilities.
</para>
</refsect2>
</refsynopsisdiv>
<refsect1 id="R1-APP-DROPLANG-1">
<refsect1info>
<date>1999-12-05</date>
</refsect1info>
<title>
Description
</title>
<para>
<application>droplang</application> is a utility for removing an
existing programming language from a
<productname>Postgres</productname> database.
<application>droplang</application> currently accepts two
languages, <literal>plsql</literal> and <literal>pltcl</literal>.
</para>
<para>
Although backend programming languages can be removed directly using
several <acronym>SQL</acronym> commands, it is recommended to use
<application>droplang</application> because it performs a number
of checks and is much easier to use. See
<xref linkend="sql-droplanguage" endterm="sql-droplanguage-title">
for more.
</para>
</refsect1>
<refsect1 id="R1-APP-DROPLANG-2">
<title>
Notes
</title>
<para>
Use <xref linkend="app-createlang" endterm="app-createlang-title">
to add a language.
</para>
</refsect1>
<refsect1 id="R1-APP-DROPLANG-3">
<title>
Usage
</title>
<para>
To remove <literal>pltcl</literal>:
<programlisting>
$ droplang pltcl
</programlisting>
</para>
</refsect1>
</refentry>
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