Hi, I have experimented with PostgreSQL's table locking and FOR UPDATE capabilities. But what I'm looking for is a row level lock specific to only a set of rows, not the entire table. For example, there is a table with many rows. Threads are doing "SELECTS" to read some rows. They should be allowed to get results on rows that are not currently locked by another thread's SELECT,FOR UPDATE or equivalent read lock for those rows only. Does PostgreSQL have a mechanism for this? thank you. Darren -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general