SHOW - show the value of a run-time parameter

       The SHOW command is a PostgreSQL extension.

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 Chapter 19 for details.

       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
           -------------------------+---------+-------------------------------------------------
            allow_system_table_mods | off     | Allows modifications of the structure of ...
               .
               .
               .
            xmloption               | content | Sets whether XML data in implicit parsing ...
            zero_damaged_pages      | off     | Continues processing past damaged page headers.
           (196 rows)

       SHOW - show the value of a run-time parameter

       The function current_setting produces equivalent output; see Section 9.28.1. Also, the pg_settings system
       view produces the same information.

name
           The name of a run-time parameter. Available parameters are documented in Chapter 19 and on the 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.

           IS_SUPERUSER
               True if the current role has superuser privileges.

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

SET(7), RESET(7)

PostgreSQL 17.5                                       2025                                               SHOW(7)

       SHOW name
       SHOW ALL