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| author | Sergey Petrunya <psergey@askmonty.org> | 2009-12-15 10:16:46 +0300 |
|---|---|---|
| committer | Sergey Petrunya <psergey@askmonty.org> | 2009-12-15 10:16:46 +0300 |
| commit | 96e092dc73529978053c1e41aa09b70fd2c7c408 (patch) | |
| tree | b6e8286b05a0b2e8772ec6da055337812d60b3e8 /mysql-test/r/null.result | |
| parent | e4e1ae0d13da399d53bd91df791b149f3eae796b (diff) | |
| download | mariadb-git-96e092dc73529978053c1e41aa09b70fd2c7c408.tar.gz | |
Backport into MariaDB-5.2 the following:
WL#2474 "Multi Range Read: Change the default MRR implementation to implement new MRR interface"
WL#2475 "Batched range read functions for MyISAM/InnoDb"
"Index condition pushdown for MyISAM/InnoDB"
Igor's fix from sp1r-igor@olga.mysql.com-20080330055902-07614:
There could be observed the following problems:
1. EXPLAIN did not mention pushdown conditions from on expressions in the
'extra' column. As a result if a query had no where conditions pushed
down to a table, but had on conditions pushed to this table the 'extra'
column in the EXPLAIN for the table missed 'using where'.
2. Conditions for ref access were not eliminated from on expressions
though such conditions were eliminated from the where condition.
Diffstat (limited to 'mysql-test/r/null.result')
| -rw-r--r-- | mysql-test/r/null.result | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/mysql-test/r/null.result b/mysql-test/r/null.result index 1cdc48e6552..897366787f1 100644 --- a/mysql-test/r/null.result +++ b/mysql-test/r/null.result @@ -148,10 +148,10 @@ insert into t1 values (7,7), (8,8), (9,9), (10,10), (11,11), (12,12); explain select * from t1 where a between 2 and 3; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range idx idx 4 NULL 2 Using where +1 SIMPLE t1 range idx idx 4 NULL 2 Using index condition; Using MRR explain select * from t1 where a between 2 and 3 or b is null; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range idx idx 4 NULL 2 Using where +1 SIMPLE t1 range idx idx 4 NULL 2 Using index condition; Using MRR drop table t1; select cast(NULL as signed); cast(NULL as signed) @@ -170,7 +170,7 @@ insert into t1 select i*2 from t1; insert into t1 values(null); explain select * from t1 where i=2 or i is null; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ref_or_null i i 5 const 9 Using where; Using index +1 SIMPLE t1 ref_or_null i i 5 const 9 Using index select count(*) from t1 where i=2 or i is null; count(*) 10 |