droplang(1)

1DROPLANG(1)             PostgreSQL Client Applications             DROPLANG(1)
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NAME

6       droplang - remove a PostgreSQL procedural language
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SYNOPSIS

10       droplang [ connection-option... ]  langname  [ dbname ]
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12       droplang [ connection-option... ]  --list | -l  dbname
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DESCRIPTION

15       droplang  is  a  utility  for removing an existing programming language
16       from a PostgreSQL database.  droplang can drop any procedural language,
17       even those not supplied by the PostgreSQL distribution.
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19       Although  backend  programming  languages can be removed directly using
20       several SQL commands, it is recommended to use droplang because it per‐
21       forms  a  number of checks and is much easier to use. See DROP LANGUAGE
22       [drop_language(7)] for more.
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OPTIONS

25       droplang accepts the following command line arguments:
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27       langname
28              Specifies the name of the backend  programming  language  to  be
29              removed.
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31       [-d] dbname
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33       [--dbname] dbname
34              Specifies  from  which  database the language should be removed.
35              The default is to use the database with the  same  name  as  the
36              current system user.
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38       -e
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40       --echo Display SQL commands as they are executed.
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42       -l
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44       --list Show  a  list of already installed languages in the target data‐
45              base.
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47       droplang also accepts the following command line arguments for  connec‐
48       tion parameters:
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50       -h host
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52       --host host
53              Specifies  the  host  name of the machine on which the server is
54              running. If host begins with a slash, it is used as  the  direc‐
55              tory for the Unix domain socket.
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57       -p port
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59       --port port
60              Specifies  the  Internet TCP/IP port or local Unix domain socket
61              file extension on which the server is listening for connections.
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63       -U username
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65       --username username
66              User name to connect as.
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68       -w
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70       --no-password
71              Never issue a password prompt. If the server  requires  password
72              authentication  and  a  password is not available by other means
73              such as a .pgpass file, the connection attempt will  fail.  This
74              option  can be useful in batch jobs and scripts where no user is
75              present to enter a password.
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77       -W
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79       --password
80              Force droplang to prompt for a password before connecting  to  a
81              database.
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83              This  option  is  never essential, since droplang will automati‐
84              cally prompt for a  password  if  the  server  demands  password
85              authentication.   However,  droplang  will  waste  a  connection
86              attempt finding out that the server wants a password.   In  some
87              cases  it  is  worth  typing  -W  to  avoid the extra connection
88              attempt.
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ENVIRONMENT

91       PGDATABASE
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93       PGHOST
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95       PGPORT
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97       PGUSER Default connection parameters
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99       This utility, like most other PostgreSQL utilities, also uses the envi‐
100       ronment variables supported by libpq (see in the documentation).
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DIAGNOSTICS

103       Most error messages are self-explanatory. If not, run droplang with the
104       --echo option and see under the respective  SQL  command  for  details.
105       Also, any default connection settings and environment variables used by
106       the libpq front-end library will apply.
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NOTES

109       Use createlang(1) to add a language.
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EXAMPLES

112       To remove the language pltcl:
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114       $ droplang pltcl dbname
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