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Fix sorting of NULL values (Should always be first)

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Fix problem with HAVING and MAX() IS NOT NULL


Docs/manual.texi:
  Changelog & NULL usage with ORDER BY
client/mysqldump.c:
  Cleanup disable keys
mysql-test/r/distinct.result:
  Fix results after ORDER BY with NULL fix
mysql-test/r/group_by.result:
  Fix results after ORDER BY with NULL fix
mysql-test/r/having.result:
  Testcase for bug with HAVING
mysql-test/t/distinct.test:
  Test for DISTINCT + ORDER BY DESC bug
mysql-test/t/having.test:
  Test of HAVING and MAX IS NOT NULL
sql/filesort.cc:
  Fix sorting of NULL values (Should always be first)
sql/item.h:
  Fix problem with HAVING and MAX() IS NOT NULL
sql/item_sum.h:
  Fix problem with HAVING and MAX() IS NOT NULL
sql/opt_range.cc:
  Fix problem with HAVING and MAX() IS NOT NULL
sql/opt_range.h:
  Fix sorting of NULL values
sql/sql_select.cc:
  Fix sorting of ORDER BY ... DESC on NULL values.
This commit is contained in:
unknown
2002-03-02 09:51:24 +02:00
parent ae670b7666
commit ad4fcb8a01
13 changed files with 144 additions and 36 deletions
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15
mysql-test/r/distinct.result
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@ -77,6 +77,7 @@ NULL NULL
10 VMT
select id+0 as a,max(id),concat(facility) as b from t1 group by a order by b desc,a;
a max(id) b
NULL NULL NULL
10 10 VMT
9 9 SRV
8 8 RV
@ -89,7 +90,6 @@ a max(id) b
1 1 /L
-1 -1
0 0
NULL NULL NULL
select id >= 0 and id <= 5 as grp,count(*) from t1 group by grp;
grp count(*)
0 7
@ -336,3 +336,16 @@ a c
4 NULL
3 NULL
drop table t1;
create table t1 (a char(1), key(a)) type=myisam;
insert into t1 values('1'),('1');
select * from t1 where a >= '1';
a
1
1
select distinct a from t1 order by a desc;
a
1
select distinct a from t1 where a >= '1' order by a desc;
a
1
drop table t1;