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Andreas Pflug wrote:

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From an idea of Bruce, the attached patch implements the function
 pg_tablespace_databases(oid) RETURNS SETOF oid
 which delivers as set of database oids having objects in the selected
 tablespace, enabling an admin to examine only the databases affecting
 the tablespace for objects instead of scanning all of them.

initdb forced
This commit is contained in:
Joe Conway
2004-07-02 18:59:25 +00:00
parent 6d6c8b0d96
commit 0b89d261c7
6 changed files with 130 additions and 8 deletions
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21
doc/src/sgml/func.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.211 2004/06/25 17:20:21 tgl Exp $
$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.212 2004/07/02 18:59:20 joe Exp $
PostgreSQL documentation
-->
@ -7232,6 +7232,10 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
<primary>pg_get_serial_sequence</primary>
</indexterm>
<indexterm zone="functions-misc">
<primary>pg_tablespace_databases</primary>
</indexterm>
<para>
<xref linkend="functions-misc-catalog-table"> lists functions that
extract information from the system catalogs.
@ -7325,6 +7329,11 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
<entry>get name of the sequence that a serial or bigserial column
uses</entry>
</row>
<row>
<entry><literal><function>pg_tablespace_databases</function>(<parameter>tablespace_oid</parameter>)</literal></entry>
<entry><type>setof oid</type></entry>
<entry>get set of database oids that have objects in the tablespace</entry>
</row>
</tbody>
</tgroup>
</table>
@ -7362,6 +7371,16 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
NULL is returned if the column does not have a sequence attached.
</para>
<para>
<function>pg_tablespace_databases</function> allows usage examination of a
tablespace. It will return a set of database oids, that have objects
stored in the tablespace. If this function returns any row, the
tablespace is assumed not to be empty and cannot be dropped. To
display the actual objects populating the tablespace, you will need
to connect to the databases returned by
<function>pg_tablespace_databases</function> to query pg_class.
</para>
<indexterm zone="functions-misc">
<primary>obj_description</primary>
</indexterm>