Hello! I have postgresql table that stores dome date range: it has range-begin and range-end columns of type date. I want to enforce that 1) range-begin would always before range-end and 2) there would be no range overlaps.
First problem could be solved with CHECK constraint. The only possibility to solve second problem is to use a trigger. Trigger would fire BEFORE INSERT OR UPDATE and FOR EACH ROW and invoke pgplsql function that returns NULL or "new" depending on condition met or not; These solution work and enforce data integrity as needed. Sadly, database interface I use (Trolltech Qt 3) can't track when trigger aborts update or insert. Can I raise exception in trigger or something? -- A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
