PostgreSQL 7.2 Documentation
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# SHOW

## Name

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

## Synopsis

    SHOW name

    SHOW ALL

### Inputs

`name`

  The name of a run-time parameter. See SET for a list.

ALL

  Show all current session parameters.

## Description

SHOW will display the current setting of a run-time parameter. These variables can be set using the SET statement or are determined at server start.

## Diagnostics

`ERROR: not a valid option name: `name``

  Message returned if `variable` does not stand for an existing parameter.

`ERROR: permission denied`

  You must be a superuser to be allowed to see certain settings.

`NOTICE: Time zone is unknown`

  If the `TZ` or `PGTZ` environment variable is not set.

## Examples

Show the current `DateStyle` setting:

    SHOW DateStyle;
    NOTICE:  DateStyle is ISO with US (NonEuropean) conventions

Show the current genetic optimizer (`geqo`) setting:

    SHOW GEQO;
    NOTICE:  geqo is on

## Compatibility

The SHOW command is a PostgreSQL extension.

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