<entry>currently held locks</entry>

</row>

<row>

<entry><link linkend="view-pg-matviews"><structname>pg_matviews</structname></link></entry>

<entry>materialized views</entry>

</row>

<row>

<entry><link linkend="view-pg-prepared-statements"><structname>pg_prepared_statements</structname></link></entry>

<entry>prepared statements</entry>

</sect1>

<sect1 id="view-pg-matviews">

<title><structname>pg_matviews</structname></title>

<indexterm zone="view-pg-matviews">

<primary>pg_matviews</primary>

</indexterm>

<indexterm zone="view-pg-matviews">

<primary>materialized views</primary>

</indexterm>

<para>

The view <structname>pg_matviews</structname> provides access to

useful information about each materialized view in the database.

</para>

<table>

<title><structname>pg_matviews</> Columns</title>

<tgroup cols="4">

<thead>

<row>

<entry>Name</entry>

<entry>Type</entry>

<entry>References</entry>

<entry>Description</entry>

</row>

</thead>

<tbody>

<row>

<entry><structfield>schemaname</structfield></entry>

<entry><type>name</type></entry>

<entry><literal><link linkend="catalog-pg-namespace"><structname>pg_namespace</structname></link>.nspname</literal></entry>

<entry>Name of schema containing materialized view</entry>

</row>

<row>

<entry><structfield>matviewname</structfield></entry>

<entry><type>name</type></entry>

<entry><literal><link linkend="catalog-pg-class"><structname>pg_class</structname></link>.relname</literal></entry>

<entry>Name of materialized view</entry>

</row>

<row>

<entry><structfield>matviewowner</structfield></entry>

<entry><type>name</type></entry>

<entry><literal><link linkend="catalog-pg-authid"><structname>pg_authid</structname></link>.rolname</literal></entry>

<entry>Name of materialized view's owner</entry>

</row>

<row>

<entry><structfield>tablespace</structfield></entry>

<entry><type>name</type></entry>

<entry><literal><link linkend="catalog-pg-tablespace"><structname>pg_tablespace</structname></link>.spcname</literal></entry>

<entry>Name of tablespace containing materialized view (null if default for database)</entry>

</row>

<row>

<entry><structfield>hasindexes</structfield></entry>

<entry><type>boolean</type></entry>

<entry><literal><link linkend="catalog-pg-class"><structname>pg_class</structname></link>.relhasindex</literal></entry>

<entry>True if materialized view has (or recently had) any indexes</entry>

</row>

<row>

<entry><structfield>isscannable</structfield></entry>

<entry><type>boolean</type></entry>

<entry></entry>

<entry>True if materialized view can currently be scanned</entry>

</row>

<row>

<entry><structfield>definition</structfield></entry>

<entry><type>text</type></entry>

<entry></entry>

<entry>Materialized view definition (a reconstructed <command>SELECT</command> query)</entry>

</row>

</tbody>

</tgroup>

</table>

</sect1>

<sect1 id="view-pg-prepared-statements">

<title><structname>pg_prepared_statements</structname></title>

<para>

The <structname>pg_rules</> view excludes the <literal>ON SELECT</> rules

of views; those can be seen in <structname>pg_views</>.

of views and materialized views; those can be seen in

<structname>pg_views</> and <structname>pg_matviews</>.

</para>

</sect1>