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Removed double records_in_range calls from multi_range_read_info_const

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This was to remove a performance regression between 10.3 and 10.4
In 10.5 we will have a better implementation of records_in_range
that will enable us to get more statistics.
This change was not done in 10.4 because the 10.5 will be part of
a larger change that is not suitable for the GA 10.4 version

Other things:
- Changed default handler block_size to 8192 to fix things statistics
  for engines that doesn't set the block size.
- Fixed a bug in spider when using multiple part const ranges
  (Patch from Kentoku)
This commit is contained in:
Monty
2020-03-13 15:28:42 +02:00
parent 96b472c0ae
commit 1242eb3d32
68 changed files with 656 additions and 505 deletions
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4
mysql-test/main/func_in.result
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@ -717,11 +717,11 @@ id select_type table type possible_keys key key_len ref rows Extra
EXPLAIN SELECT * FROM t1 WHERE c_timestamp
IN ('2009-09-01 00:00:01', '2009-09-01 00:00:02', '2009-09-01 00:00:03');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL c_timestamp NULL NULL NULL 20 Using where
1 SIMPLE t1 range c_timestamp c_timestamp 4 NULL 3 Using index condition
EXPLAIN SELECT * FROM t1 WHERE c_timestamp
IN (NULL, '2009-09-01 00:00:01', '2009-09-01 00:00:02', '2009-09-01 00:00:03');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL c_timestamp NULL NULL NULL 20 Using where
1 SIMPLE t1 range c_timestamp c_timestamp 4 NULL 3 Using index condition
EXPLAIN SELECT * FROM t1 WHERE c_timestamp IN (NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables