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><H1
><A
NAME="APP-DROPLANG"
></A
><SPAN
CLASS="APPLICATION"
>droplang</SPAN
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN68062"
></A
><H2
>Name</H2
>droplang -- remove a <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> procedural language</DIV
><A
NAME="AEN68066"
></A
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN68068"
></A
><H2
>Synopsis</H2
><P
><TT
CLASS="COMMAND"
>droplang</TT
> [<TT
CLASS="REPLACEABLE"
><I
>connection-option</I
></TT
>...] <TT
CLASS="REPLACEABLE"
><I
>langname</I
></TT
> [<TT
CLASS="REPLACEABLE"
><I
>dbname</I
></TT
>]<BR><TT
CLASS="COMMAND"
>droplang</TT
> [<TT
CLASS="REPLACEABLE"
><I
>connection-option</I
></TT
>...] --list | -l <TT
CLASS="REPLACEABLE"
><I
>dbname</I
></TT
> </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="R1-APP-DROPLANG-1"
></A
><H2
> Description
</H2
><P
> <SPAN
CLASS="APPLICATION"
>droplang</SPAN
> is a utility for removing an
existing programming language from a
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> database.
<SPAN
CLASS="APPLICATION"
>droplang</SPAN
> can drop any procedural language,
even those not supplied by the <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> distribution.
</P
><P
> Although backend programming languages can be removed directly using
several <ACRONYM
CLASS="ACRONYM"
>SQL</ACRONYM
> commands, it is recommended to use
<SPAN
CLASS="APPLICATION"
>droplang</SPAN
> because it performs a number
of checks and is much easier to use. See
<A
HREF="sql-droplanguage.html"
><I
>DROP LANGUAGE</I
></A
>
for more.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN68097"
></A
><H2
>Options</H2
><P
> <SPAN
CLASS="APPLICATION"
>droplang</SPAN
> accepts the following command line arguments:
<P
></P
></P><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="REPLACEABLE"
><I
>langname</I
></TT
></DT
><DD
><P
> Specifies the name of the backend programming language to be removed.
</P
></DD
><DT
><TT
CLASS="OPTION"
>[<SPAN
CLASS="OPTIONAL"
>-d</SPAN
>] <TT
CLASS="REPLACEABLE"
><I
>dbname</I
></TT
></TT
><BR><TT
CLASS="OPTION"
>[<SPAN
CLASS="OPTIONAL"
>--dbname</SPAN
>] <TT
CLASS="REPLACEABLE"
><I
>dbname</I
></TT
></TT
></DT
><DD
><P
> Specifies from which database the language should be removed.
The default is to use the database with the same name as the
current system user.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-e</TT
><BR><TT
CLASS="OPTION"
>--echo</TT
></DT
><DD
><P
> Display SQL commands as they are executed.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-l</TT
><BR><TT
CLASS="OPTION"
>--list</TT
></DT
><DD
><P
> Show a list of already installed languages in the target database.
</P
></DD
></DL
></DIV
><P>
</P
><P
> <SPAN
CLASS="APPLICATION"
>droplang</SPAN
> also accepts
the following command line arguments for connection parameters:
<P
></P
></P><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="OPTION"
>-h <TT
CLASS="REPLACEABLE"
><I
>host</I
></TT
></TT
><BR><TT
CLASS="OPTION"
>--host <TT
CLASS="REPLACEABLE"
><I
>host</I
></TT
></TT
></DT
><DD
><P
> Specifies the host name of the machine on which the
server
is running. If host begins with a slash, it is used
as the directory for the Unix domain socket.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-p <TT
CLASS="REPLACEABLE"
><I
>port</I
></TT
></TT
><BR><TT
CLASS="OPTION"
>--port <TT
CLASS="REPLACEABLE"
><I
>port</I
></TT
></TT
></DT
><DD
><P
> Specifies the Internet TCP/IP port or local Unix domain socket file
extension on which the server
is listening for connections.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-U <TT
CLASS="REPLACEABLE"
><I
>username</I
></TT
></TT
><BR><TT
CLASS="OPTION"
>--username <TT
CLASS="REPLACEABLE"
><I
>username</I
></TT
></TT
></DT
><DD
><P
> User name to connect as.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-w</TT
><BR><TT
CLASS="OPTION"
>--no-password</TT
></DT
><DD
><P
> Never issue a password prompt. If the server requires
password authentication and a password is not available by
other means such as a <TT
CLASS="FILENAME"
>.pgpass</TT
> file, the
connection attempt will fail. This option can be useful in
batch jobs and scripts where no user is present to enter a
password.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-W</TT
><BR><TT
CLASS="OPTION"
>--password</TT
></DT
><DD
><P
> Force <SPAN
CLASS="APPLICATION"
>droplang</SPAN
> to prompt for a
password before connecting to a database.
</P
><P
> This option is never essential, since
<SPAN
CLASS="APPLICATION"
>droplang</SPAN
> will automatically prompt
for a password if the server demands password authentication.
However, <SPAN
CLASS="APPLICATION"
>droplang</SPAN
> will waste a
connection attempt finding out that the server wants a password.
In some cases it is worth typing <TT
CLASS="OPTION"
>-W</TT
> to avoid the extra
connection attempt.
</P
></DD
></DL
></DIV
><P>
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN68182"
></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
><P
> This utility, like most other <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> utilities,
also uses the environment variables supported by <SPAN
CLASS="APPLICATION"
>libpq</SPAN
>
(see <A
HREF="libpq-envars.html"
>Section 30.13</A
>).
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN68200"
></A
><H2
>Diagnostics</H2
><P
> Most error messages are self-explanatory. If not, run
<SPAN
CLASS="APPLICATION"
>droplang</SPAN
> with the <TT
CLASS="OPTION"
>--echo</TT
>
option and see under the respective <ACRONYM
CLASS="ACRONYM"
>SQL</ACRONYM
> command
for details. 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="AEN68207"
></A
><H2
>Notes</H2
><P
> Use <A
HREF="app-createlang.html"
><SPAN
CLASS="APPLICATION"
>createlang</SPAN
></A
> to add a language.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN68211"
></A
><H2
>Examples</H2
><P
> To remove the language <TT
CLASS="LITERAL"
>pltcl</TT
>:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$ </SAMP
><KBD
CLASS="USERINPUT"
>droplang pltcl dbname</KBD
></PRE
><P>
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN68218"
></A
><H2
>See Also</H2
><A
HREF="app-createlang.html"
><SPAN
CLASS="APPLICATION"
>createlang</SPAN
></A
>, <A
HREF="sql-droplanguage.html"
><I
>DROP LANGUAGE</I
></A
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