Subject Re: [firebird-support] Strange Lock Conflict
Author Dmitry Yemanov
"dmarmur2002" <arbit@...> wrote:
> I have a unique index on a field marked to take NULL values. I can
> insert multiple records in this table with or without specifying NULL
> in the VALUES "clause".
> But with two connections and each using Read Committed i get a Lock
> Conflict if the first transaction is posted but not committed.

This is a known bug, fixed in v2.0.