Hi Andreas, Thanks for the info about COPY !! On Mar 6, 1:23 pm, andr...@xxxxxxxxxxxx (Andreas Kostyrka) wrote: > * Richard Huxton <d...@xxxxxxxxxxxx> [070306 12:22]:> >>2. You can do a COPY from libpq - is it really not possible? > > > >Not really but i have been testing it and inserts are flying (about > > >100000 inserts/sec) !! > > > What's the problem with the COPY? Could you COPY into one table then insert from that to your target table? > > Well, there are some issues. First your client needs to support it. > E.g. psycopg2 supports only some specific CSV formatting in it's > methods. (plus I had sometimes random psycopg2 crashes, but guarding against > these is cheap compared to the speedup from COPY versus INSERT) > Plus you need to be sure that your data will apply cleanly (which in > my app was not the case), or you need to code a fallback that > localizes the row that doesn't work. > > And the worst thing is, that it ignores RULES on the tables, which > sucks if you use them ;) (e.g. table partitioning). Ok, but what about constraints (foreign keys and SERIAL id) using a copy statement ? do we need to handle auto-generated id (SERIAL) manually ? Thanks for your feedback. Regards, Joël
