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Some trivial optimzations

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Check if AND/OR expression can be NULL; Fixed bug in GROUP BY and-or-expression where expression could be NULL
Bug fix for SHOW OPEN TABLES when user didn't have privilege to access all open tables.
Better fix for ALTER TABLE on BDB tables.
This commit is contained in:
monty@mashka.mysql.fi
2002-09-03 15:44:25 +03:00
parent a5f9e95a93
commit a01a0840dc
24 changed files with 131 additions and 53 deletions
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16
mysql-test/t/select.test
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@@ -1405,9 +1405,9 @@ drop table tmp;
# big table done
SET OPTION SQL_BIG_TABLES=1;
SET SQL_BIG_TABLES=1;
select distinct concat(fld3," ",fld3) as namn from t2,t3 where t2.fld1=t3.t2nr order by namn limit 10;
SET OPTION SQL_BIG_TABLES=0;
SET SQL_BIG_TABLES=0;
select distinct concat(fld3," ",fld3) from t2,t3 where t2.fld1=t3.t2nr order by fld3 limit 10;
select distinct fld5 from t2 limit 10;
@@ -1416,9 +1416,9 @@ select distinct fld5 from t2 limit 10;
#
select distinct fld3,count(*) from t2 group by companynr,fld3 limit 10;
SET OPTION SQL_BIG_TABLES=1; # Force use of MyISAM
SET SQL_BIG_TABLES=1; # Force use of MyISAM
select distinct fld3,count(*) from t2 group by companynr,fld3 limit 10;
SET OPTION SQL_BIG_TABLES=0;
SET SQL_BIG_TABLES=0;
select distinct fld3,repeat("a",length(fld3)),count(*) from t2 group by companynr,fld3 limit 100,10;
#
@@ -1439,6 +1439,14 @@ select distinct fld3 from t2,t3 where t2.companynr = 34 and t2.fld1=t3.t2nr orde
explain select t3.t2nr,fld3 from t2,t3 where t2.companynr = 34 and t2.fld1=t3.t2nr order by t3.t2nr,fld3;
#
# Some test with ORDER BY and limit
#
explain select * from t3 as t1,t3 where t1.period=t3.period order by t3.period;
explain select * from t3 as t1,t3 where t1.period=t3.period order by t3.period limit 10;
explain select * from t3 as t1,t3 where t1.period=t3.period order by t1.period limit 10;
#
# Search with a constant table.
#