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Added keyread_time() to HEAP

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The default keyread_time() was optimized for blocks and not suitable for
HEAP. The effect was the HEAP prefered table scans over ranges for btree
indexes.
Fixed also get_sweep_read_cost() for HEAP tables.
This commit is contained in:
Monty
2020-03-05 14:10:03 +02:00
parent a24d0926b9
commit c037cdadf4
6 changed files with 15 additions and 11 deletions
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2
mysql-test/suite/heap/heap_btree.result
View File

@ -178,7 +178,7 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range btn btn 10 NULL 1 Using where
explain select * from t1 where btn like "h%";
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL btn NULL NULL NULL # Using where
1 SIMPLE t1 range btn btn 10 NULL # Using where
explain select * from t1 where btn like "a%";
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range btn btn 10 NULL 1 Using where

8
mysql-test/suite/heap/heap_hash.result
View File

@ -428,14 +428,14 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range uniq_id uniq_id 8 NULL 2 Using where
select 0+a from t1 where a in (869751,736494,226312,802616,728912);
0+a
869751
736494
226312
802616
728912
736494
802616
869751
explain select 0+a from t1 where a in (869751,736494,226312,802616,728912);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL uniq_id NULL NULL NULL 5 Using where
1 SIMPLE t1 range uniq_id uniq_id 8 NULL 5 Using where
drop table t1;
End of 5.3 tests
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