olafos <olafoos@wp.pl> writes:
> Seems like the driver is trying to send the number 40,000 (which is actually
> the number of query parameters) as a 2-byte integer. Is there any limit to
> the number of jdbc query parameters in postgresql?

Yeah, 2^16, as you already noticed.

40000 parameters is far beyond the bounds of sanity anyway. Try sending
them as a single array parameter, ie "foo = any (?::int[])"

regards, tom lane

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