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Josh Berkus wrote: | Gaetano, | | |>don't you think the best statistic target for a boolean |>column is something like 2? Or in general the is useless |>have a statistics target > data type cardinality ? | | | It depends, really, on the proportionality of the boolean values; if they're | about equal, I certainly wouldn't raise Stats from the default of 10. If, | however, it's very dispraportionate -- like 2% true and 98% false -- then it | may pay to have better statistics so that the planner doesn't assume 50% | hits, which it otherwise might.
So, I didn't understand how the statistics hystogram works. I'm going to take a look at analyze.c
Regards Gaetano Mendola
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