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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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3
mysql-test/main/range.test
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@ -960,6 +960,7 @@ CREATE TABLE t1 (
INSERT INTO t1 VALUES
('B'), ('A'), ('A'), ('C'), ('B'), ('A'), ('A'), ('C'), ('A');
INSERT INTO t1 VALUES ('X'),('Y'),('Z'),('X1'),('Y1'),('Z1'),('X1'),('Y1'),('Z1');
SELECT a FROM t1 WHERE a='b' OR a='B';
EXPLAIN SELECT a FROM t1 WHERE a='b' OR a='B';
@ -1077,7 +1078,7 @@ INSERT INTO t3 VALUES
# To make range scan compelling to the optimizer
INSERT INTO t3 SELECT * FROM t3 WHERE a = 10;
INSERT INTO t3 SELECT * FROM t3 WHERE a = 10;
insert into t1 select -a,b from t1;
#
# Problem#1 Test queries. Will give missing results unless Problem#1 is fixed.