I am not really sure wether I MUST use it or not, but I think it is a nice feature to be utilized. What I want is a long running producing up to hundred of thousands results which have to undergo a computationally expensive postprocessing step which needs to be execeuted in parallel. By using pipelining I would not need to worry about partitioning the query and thus distributing the workload. At least as far as I understand the pipelining feature... tschak
