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Merge mariadb-11.0.2 into 11.0

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Marko Mäkelä
2023-06-08 11:35:36 +03:00
parent ded4ed3220 0005f2f06c
commit cb9d97ef38
429 changed files with 4171 additions and 1742 deletions
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12
sql/opt_subselect.cc
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@@ -4104,6 +4104,7 @@ void fix_semijoin_strategies_for_picked_join_order(JOIN *join)
*/
join->cur_sj_inner_tables= 0;
Json_writer_object semijoin_strategy(thd);
double inner_fanout= 1.0;
semijoin_strategy.add("semi_join_strategy","FirstMatch");
Json_writer_array semijoin_plan(thd, "join_order");
for (idx= first; idx <= tablenr; idx++)
@@ -4126,9 +4127,20 @@ void fix_semijoin_strategies_for_picked_join_order(JOIN *join)
record_count, join->best_positions + idx, &dummy);
set_if_smaller(join->best_positions[idx].records_out, records_out);
}
/*
TODO: We should also compute the selectivity here, as well as adjust
the records_out according to the fraction of records removed by
the semi-join.
*/
double rec_out= join->best_positions[idx].records_out;
if (join->best_positions[idx].table->emb_sj_nest)
inner_fanout *= rec_out;
record_count *= join->best_positions[idx].records_out;
rem_tables &= ~join->best_positions[idx].table->table->map;
}
if (inner_fanout > 1.0)
join->best_positions[tablenr].records_out /= inner_fanout;
}
if (pos->sj_strategy == SJ_OPT_LOOSE_SCAN)