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doc: Clarify CREATE TABLESPACE documentation

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Be more specific about when and how to create the directory and what
permissions it should have.

Discussion: https://www.postgresql.org/message-id/flat/5ca60e1a-26f9-89fd-e912-021dd2b8afe2%40gmail.com
This commit is contained in:
Peter Eisentraut 2018-09-24 14:47:09 +02:00
parent fdba460a26
commit a6949ca34d
1 changed files with 13 additions and 4 deletions
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17
doc/src/sgml/ref/create_tablespace.sgml
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@ -92,7 +92,8 @@ CREATE TABLESPACE <replaceable class="parameter">tablespace_name</replaceable>
<listitem>
<para>
The directory that will be used for the tablespace. The directory
should be empty and must be owned by the
must exist (<command>CREATE TABLESPACE</command> will not create it),
should be empty, and must be owned by the
<productname>PostgreSQL</productname> system user. The directory must be
specified by an absolute path name.
</para>
@ -137,15 +138,23 @@ CREATE TABLESPACE <replaceable class="parameter">tablespace_name</replaceable>
<title>Examples</title>
<para>
Create a tablespace <literal>dbspace</literal> at <literal>/data/dbs</literal>:
To create a tablespace <literal>dbspace</literal> at file system location
<literal>/data/dbs</literal>, first create the directory using operating
system facilities and set the correct ownership:
<programlisting>
mkdir /data/dbs
chown postgres:postgres /data/dbs
</programlisting>
Then issue the tablespace creation command inside
<productname>PostgreSQL</productname>:
<programlisting>
CREATE TABLESPACE dbspace LOCATION '/data/dbs';
</programlisting>
</para>
<para>
Create a tablespace <literal>indexspace</literal> at <literal>/data/indexes</literal>
owned by user <literal>genevieve</literal>:
To create a tablespace owned by a different database user, use a command
like this:
<programlisting>
CREATE TABLESPACE indexspace OWNER genevieve LOCATION '/data/indexes';
</programlisting></para>