Rainer,
>I did not find a solution so far; and for bulk data transfers I now
>programmed a workaround.
But that is surely based on some component installed on the server, isn't it?
Correct. I use a pyro-remote server. On request this remote server copies the relevant rows into a temporary table, uses a copy_to Call to push them into a StringIO-Objekt (that's Pythons version of "In Memory File"), serializes that StringIO-Objekt, does a bz2-compression and transfers the whole block via VPN.
I read on in this thread, and I scheduled to check on psycopg2 and what it is doing with cursors.
Harald
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GHUM Harald Massa
persuadere et programmare
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