The DBDeleteTime statement requires a component name, comparator and time value, in the format

DBDeleteTime <component name> <comparator> <timevalue>

• The comparator is < = > ⇐ >= or <> (< is the most useful)
• <timevalue> is something like “5 seconds” or “10 minutes” or “3 weeks” (see PostgreSQL Interval Input - http://www.postgresql.org/docs/9.1/static/datatype-datetime.html#DATATYPE-INTERVAL-INPUT

Example

DBDeleteTime subject < "3 months"

This will delete all records for the 'subject' component which were last updated earlier than 3 months ago.

The SQL expression is created as 'updatetime <comparator> now() - <timevalue>', so the above statement's query string becomes where updatetime < now() - '3 months'