sql constraint clarification, thanks Markus Petzsch

diff --git a/pdns/docs/pdns.xml b/pdns/docs/pdns.xml
index 0cb5ca90361d04f0294ac4e7feb97bd8584f4a4a..34792c63a56d978ce02d343402edfe502ae9c305 100644 (file)
--- a/pdns/docs/pdns.xml
+++ b/pdns/docs/pdns.xml
@@ -16850,6 +16850,11 @@ while(<>)
 <programlisting>
 CONSTRAINT `records_ibfk_1` FOREIGN KEY (`domain_id`) REFERENCES `domains`
 (`id`) ON DELETE CASCADE
+</programlisting>
+    Or, if you have already created the tables, execute:
+<programlisting>
+ALTER TABLE `records` ADD CONSTRAINT `records_ibfk_1` FOREIGN KEY (`domain_id`)
+REFERENCES `domains` (`id`) ON DELETE CASCADE;
 </programlisting>
        </para>
        <para>