"Tomas Vondra" <tv@fuzzy.cz> writes: > Dne 5 Listopad 2014, 18:10, Tom Lane napsal(a): >> For some reason there's over 1000 times more rows in andalertsmatch in >> the 9.1.14 installation. I'm betting on a foulup somewhere in the data >> dump/restore process.
> I'd bet that's mostly due to rescans in the merge join ...
Doh, I should have thought of that :-(. But still, the difference in the number of final output rows is pretty compelling evidence that it's not really the same data.