--lc-collate=ko_KR.euckr --lc-ctype=ko_KR.euckr korean
</screen>
This will create a database named <literal>korean</literal> that
uses the character set <literal>EUC_KR</literal>, and locale <literal>ko_KR</literal>.
Another way to accomplish this is to use this SQL command:
<programlisting>
CREATE DATABASE korean WITH ENCODING 'EUC_KR' LC_COLLATE='ko_KR.euckr' LC_CTYPE='ko_KR.euckr' TEMPLATE=template0;
</programlisting>
Notice that the above commands specify copying the <literal>template0</literal>
database. When copying any other database, the encoding and locale
settings cannot be changed from those of the source database, because
that might result in corrupt data. For more information see
<xref linkend="manage-ag-templatedbs"/>.
</para>
<para>
The encoding for a database is stored in the system catalog
<literal>pg_database</literal>. You can see it by using the
<command>psql</command> <option>-l</option> option or the
<command>\l</command> command.
<screen>
$ <userinput>psql -l</userinput>
List of databases
Name | Owner | Encoding | Collation | Ctype | Access Privileges
-----------+----------+-----------+-------------+-------------+-------------------------------------
clocaledb | hlinnaka | SQL_ASCII | C | C |
englishdb | hlinnaka | UTF8 | en_GB.UTF8 | en_GB.UTF8 |
japanese | hlinnaka | UTF8 | ja_JP.UTF8 | ja_JP.UTF8 |
korean | hlinnaka | EUC_KR | ko_KR.euckr | ko_KR.euckr |
postgres | hlinnaka | UTF8 | fi_FI.UTF8 | fi_FI.UTF8 |
template0 | hlinnaka | UTF8 | fi_FI.UTF8 | fi_FI.UTF8 | {=c/hlinnaka,hlinnaka=CTc/hlinnaka}
template1 | hlinnaka | UTF8 | fi_FI.UTF8 | fi_FI.UTF8 | {=c/hlinnaka,hlinnaka=CTc/hlinnaka}
(7 rows)
</screen>
</para>
<important>
<para>
On most modern operating systems, <productname>PostgreSQL</productname>
can determine which character set is implied by the <envar>LC_CTYPE</envar>
setting, and it will enforce that only the matching database encoding is
used. On older systems it is your responsibility to ensure that you use
the encoding expected by the locale you have selected. A mistake in
this area is likely to lead to strange behavior of locale-dependent
operations such as sorting.
</para>
<para>
<productname>PostgreSQL</productname> will allow superusers to create
databases with <literal>SQL_ASCII</literal> encoding even when
<envar>LC_CTYPE</envar> is not <literal>C</literal> or <literal>POSIX</literal>. As noted
above, <literal>SQL_ASCII</literal> does not enforce that the data stored in
the database has any particular encoding, and so this choice poses risks
of locale-dependent misbehavior. Using this combination of settings is
deprecated and may someday be forbidden altogether.
</para>
</important>
</sect2>
<sect2 id="multibyte-automatic-conversion">
<title>Automatic Character Set Conversion Between Server and Client</title>
<para>
<productname>PostgreSQL</productname> supports automatic character
set conversion between server and client for many combinations of
character sets (<xref linkend="multibyte-conversions-supported"/>
shows which ones).
</para>
<para>
To enable automatic character set conversion, you have to
tell <productname>PostgreSQL</productname> the character set
(encoding) you would like to use in the client. There are several
ways to accomplish this:
<itemizedlist>
<listitem>
<para>
Using the <command>\encoding</command> command in
<application>psql</application>.
<command>\encoding</command> allows you to change client
encoding on the fly. For
example, to change the encoding to <literal>SJIS</literal>, type:
<programlisting>
\encoding