ITAGAKI Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp> writes:
> I tested 8.3beta4 with DBT-3 (TPC-H) and found unstable selection of plans.
> Planner randomly selected two types of plans (A, B) when I repeated EXPLAIN.
Are you sure the statistics weren't changing underneath you (due to
auto-vacuum or auto-analyze)?
regards, tom lane
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