1berry/MariaDB-server
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

MWL#89

Browse Source 
Removed forgotten EXPLAIN EXTENDED from the test file.
This commit is contained in:
unknown 2011-06-21 23:01:01 +03:00
parent 44570d2b12
commit e1d734f383
2 changed files with 7 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
mysql-test/r/subselect_mat_cost.result
View File

@ -145,7 +145,7 @@ Q1.2e:
IN_EXISTS: join order is the same, but the left IN operand refers to
only the first table in the join order (Country), so there are much
fewer rows to filter by subquery re-execution.
EXPLAIN extended
EXPLAIN
SELECT *
FROM Country, City
WHERE City.Country = Country.Code AND
@ -153,12 +153,10 @@ Country.SurfaceArea < 3000 AND Country.SurfaceArea > 10 AND
(Country.Name IN
(select Language from CountryLanguage where Percentage > 50) OR
Country.name LIKE '%Island%');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY Country ALL PRIMARY,SurfaceArea NULL NULL NULL 239 19.67 Using where
1 PRIMARY City ref Country Country 3 world.Country.Code 18 100.00
2 DEPENDENT SUBQUERY CountryLanguage index_subquery Percentage,Language Language 30 func 2 100.00 Using where
Warnings:
Note 1003 select `world`.`Country`.`Code` AS `Code`,`world`.`Country`.`Name` AS `Name`,`world`.`Country`.`SurfaceArea` AS `SurfaceArea`,`world`.`Country`.`Population` AS `Population`,`world`.`Country`.`Capital` AS `Capital`,`world`.`City`.`ID` AS `ID`,`world`.`City`.`Name` AS `Name`,`world`.`City`.`Country` AS `Country`,`world`.`City`.`population` AS `population` from `world`.`Country` join `world`.`City` where ((`world`.`City`.`Country` = `world`.`Country`.`Code`) and (`world`.`Country`.`SurfaceArea` < 3000) and (`world`.`Country`.`SurfaceArea` > 10) and (<expr_cache><`world`.`Country`.`Name`>(<in_optimizer>(`world`.`Country`.`Name`,<exists>(<index_lookup>(<cache>(`world`.`Country`.`Name`) in CountryLanguage on Language where ((`world`.`CountryLanguage`.`Percentage` > 50) and (<cache>(`world`.`Country`.`Name`) = `world`.`CountryLanguage`.`Language`)))))) or (`world`.`Country`.`Name` like '%Island%')))
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY Country ALL PRIMARY,SurfaceArea NULL NULL NULL 239 Using where
1 PRIMARY City ref Country Country 3 world.Country.Code 18
2 DEPENDENT SUBQUERY CountryLanguage index_subquery Percentage,Language Language 30 func 2 Using where
SELECT *
FROM Country, City
WHERE City.Country = Country.Code AND

4
mysql-test/t/subselect_mat_cost.test
View File

@ -1,4 +1,4 @@
#
#
# Tests of cost-based choice between the materialization and in-to-exists
# subquery execution strategies (MWL#89)
#
@ -113,7 +113,7 @@ SELECT *
-- echo IN_EXISTS: join order is the same, but the left IN operand refers to
-- echo only the first table in the join order (Country), so there are much
-- echo fewer rows to filter by subquery re-execution.
EXPLAIN extended
EXPLAIN
SELECT *
FROM Country, City
WHERE City.Country = Country.Code AND