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Removed /2 of InnoDB ref_per_key[] estimates

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The original code was there to favor index search over table scan.
This is not needed anymore as the cost calculations for table scans
and index lookups are now more exact.
This commit is contained in:
Monty
2023-01-26 11:38:31 +02:00
parent 87507bbb4f
commit 01c82173dd
13 changed files with 64 additions and 33 deletions
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2
mysql-test/main/order_by_innodb.result
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@ -258,7 +258,7 @@ dd.d1, dd.d2, dd.id limit 1
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL #
1 PRIMARY t2 eq_ref PRIMARY,id2 id2 8 test.t1.id,func # Using where; Using index
2 DEPENDENT SUBQUERY dd ref id2,for_latest_sort id2 4 test.t1.id # Using where; Using filesort
2 DEPENDENT SUBQUERY dd range id2,for_latest_sort for_latest_sort 6 NULL # Using where
drop table t1,t2,t3;
# End of 10.2 tests
#