wikibot
| Trigger Function
|
public.setipinterfacekeysonupdate
|
Source
CREATE OR REPLACE FUNCTION public.setipinterfacekeysonupdate()
RETURNS trigger
LANGUAGE plpgsql
AS $function$
BEGIN
-- ifServices must have an IP address that is *not* 0.0.0.0
IF NEW.ipAddr IS NOT NULL AND NEW.ipAddr = '0.0.0.0'
THEN
RAISE EXCEPTION 'IfServices Trigger Exception, Condition 0: ipAddr of 0.0.0.0 is not allowed in ifServices table';
END IF;
--
-- (Used with Trigger Update with old style foreign key)
-- This condition keeps ipinterfaceid inSync with the composite foreign key of nodeid, ipaddr, ifindex
-- This usually happens when a record is being updated by old JDBC code (non-Hibernate DAOs) and has changed
-- one or more of the composite key values, the ipInterfaceId needs to be updated
--
IF (NEW.ipInterfaceId = OLD.ipInterfaceId) AND (NEW.nodeId != OLD.nodeId OR NEW.ipAddr != OLD.ipAddr)
THEN
SELECT ipif.id INTO NEW.ipInterfaceId
FROM ipinterface ipif
WHERE (ipif.nodeid = NEW.nodeid AND ipif.ipAddr = NEW.ipAddr AND ipif.ipAddr != '0.0.0.0');
IF NOT FOUND THEN
RAISE EXCEPTION 'IfServices Trigger Exception, Condition 3: No IpInterface found for... nodeid: % ipaddr: % ', NEW.nodeid, NEW.ipAddr;
END IF;
--
-- (Used with Trigger Update with new style foreign key)
-- This condition keeps the composite foreign key of nodeid, ipaddr, ifindex inSync with the ipinterfaceid
-- This usually happens with the Hibernate DAOs decide to change the ipinterfaceid represented
-- by the ifservices.
--
ELSIF NEW.ipInterfaceId != OLD.ipInterfaceId
THEN
SELECT ipif.nodeId, ipif.ipAddr, ipif.ifIndex INTO NEW.nodeId, NEW.ipAddr, NEW.ifIndex
FROM ipinterface ipif
WHERE (ipif.id = NEW.ipInterfaceId);
IF NOT FOUND THEN
RAISE EXCEPTION 'IfServices Trigger Exception, Condition 4: No IpInterface found for ipInterfaceId: %', NEW.ipInterfaceId;
END IF;
IF NEW.ipAddr = '0.0.0.0'
THEN
RAISE EXCEPTION 'IfServices Trigger Exception, Condition 5: IpInterface found for ipInterfaceId: % has 0.0.0.0 ipAddr', NEW.ipInterfaceId;
END IF;
END IF;
RETURN NEW;
END;
$function$
References
