On 2017/04/04 14:12, Amit Langote wrote:
> Two kinds of statistics are collected if the table is a inheritance parent.
> 
> First kind considers the table by itself and calculates regular
> single-table statistics using rows sampled from the only available heap
> (by calling do_analyze_rel() with inh=false).

Oops, should have also mentioned that this part is not true for the new
partitioned tables.  There are single-table statistics for partitioned
tables, because it contains no data.

Thanks,
Amit




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