mariadb/mysql-test/suite/compat
Sergei Petrunia ef76f81c98 MDEV-20109: Optimizer ignores distinct key created for materialized...
(Backported to 10.3, addressed review input)

Sj_materialization_picker::check_qep(): fix error in cost/fanout
calculations:
- for each join prefix, add #prefix_rows / TIME_FOR_COMPARE to the cost,
  like best_extension_by_limited_search does
- Remove the fanout produced by the subquery tables.
- Also take into account join condition selectivity

optimize_wo_join_buffering() (used by LooseScan and FirstMatch)
- also add #prefix_rows / TIME_FOR_COMPARE to the cost of each prefix.
- Also take into account join condition selectivity
2019-08-30 12:02:40 +03:00
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oracle MDEV-20109: Optimizer ignores distinct key created for materialized... 2019-08-30 12:02:40 +03:00