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-rw-r--r--doc/src/sgml/ref/alter_extension.sgml9
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/src/sgml/ref/alter_extension.sgml b/doc/src/sgml/ref/alter_extension.sgml
index 5341f53d06f..cbe5043fef5 100644
--- a/doc/src/sgml/ref/alter_extension.sgml
+++ b/doc/src/sgml/ref/alter_extension.sgml
@@ -291,6 +291,15 @@ ALTER EXTENSION hstore ADD FUNCTION populate_record(anyelement, hstore);
</programlisting></para>
</refsect1>
+ <refsect1>
+ <title>Compatibility</title>
+
+ <para>
+ <command>ALTER EXTENSION</command> is a <productname>PostgreSQL</>
+ extension.
+ </para>
+ </refsect1>
+
<refsect1 id="SQL-ALTEREXTENSION-see-also">
<title>See Also</title>