SHOW(7)                                                   SQL Commands                                                   SHOW(7)



NAME
       SHOW - show the value of a run-time parameter


SYNOPSIS
       SHOW name
       SHOW ALL


DESCRIPTION
       SHOW  will  display  the  current  setting of run-time parameters. These variables can be set using the SET statement, by
       editing the postgresql.conf configuration file, through the PGOPTIONS environmental  variable  (when  using  libpq  or  a
       libpq-based  application),  or through command-line flags when starting the postgres server. See in the documentation for
       details.

PARAMETERS
       name   The name of a run-time parameter. Available parameters are documented in in  the  documentation  and  on  the  SET
              [set(7)] reference page. In addition, there are a few parameters that can be shown but not set:

              SERVER_VERSION
                     Shows the server's version number.

              SERVER_ENCODING
                     Shows  the server-side character set encoding. At present, this parameter can be shown but not set, because
                     the encoding is determined at database creation time.

              LC_COLLATE
                     Shows the database's locale setting for collation (text ordering). At present, this parameter can be  shown
                     but not set, because the setting is determined at database creation time.

              LC_CTYPE
                     Shows  the  database's locale setting for character classification. At present, this parameter can be shown
                     but not set, because the setting is determined at database creation time.

              IS_SUPERUSER
                     True if the current role has superuser privileges.

       ALL    Show the values of all configuration parameters, with descriptions.

NOTES
       The function current_setting produces equivalent output; see in the documentation.  Also,  the  pg_settings  system  view
       produces the same information.

EXAMPLES
       Show the current setting of the parameter DateStyle:

       SHOW DateStyle;
        DateStyle
       -----------
        ISO, MDY
       (1 row)


       Show the current setting of the parameter geqo:

       SHOW geqo;
        geqo
       ------
        on
       (1 row)


       Show all settings:

       SHOW ALL;
                     name              |            setting             |                                         description
       --------------------------------+--------------------------------+----------------------------------------------------------------------------------------------
        add_missing_from               | off                            | Automatically adds missing table references to FROM clauses.
        allow_system_table_mods        | off                            | Allows modifications of the structure of system tables.
           .
           .
           .
        work_mem                       | 1024                           | Sets the maximum memory to be used for query workspaces.
        zero_damaged_pages             | off                            | Continues processing past damaged page headers.
       (146 rows)


COMPATIBILITY
       The SHOW command is a PostgreSQL extension.

SEE ALSO
       SET [set(7)], RESET [reset(7)]



SQL - Language Statements                                  2011-09-22                                                    SHOW(7)