Albe Laurenz пишет:
Vlad Arkhipov wrote:
I found strange issue in very simple query.
You forgot to mention what your problem is.
Yours,
Laurenz Albe
It was written below in my first post:
"These queries are part of big query and optimizer put them on the leaf
of query tree, so rows miscount causes a real problem. "
actual rows count for the first query is 294, estimate - 11; for the
second -- 283 and 0. Postgres tries to use nested loops when it should
use merge/hash join and vice versa.
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