Sergey Belikov <belikov(at)bnl(dot)gov> writes:
> ... Each thread
> creates it's own PGconn connection, and starts lo_export(conn, loid,
> filename) procedure. The problem is: after starting 2-3 threads SELECT
> query of the main program fails because "another command is already in
> progress".
I'll bet lunch that you have not actually created a PGconn for each
thread --- or else that one of the threads is using the wrong PGconn
object.
regards, tom lane