database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

filesort.cc, order_by.result:

Browse Source 
Fixed bug 263
order_by.test:
  Fixed bug 263
This commit is contained in:
igor@hundin.mysql.fi
2003-04-26 14:54:53 +03:00
parent 2ad37c0632
commit b6534b667f
3 changed files with 46 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
mysql-test/r/order_by.result
View File

@ -517,3 +517,28 @@ SELECT titre,t1.numeropost,auteur,icone,nbrep,'0',date,vue,ouvert,lastauteur,des
titre numeropost auteur icone nbrep 0 date vue ouvert lastauteur dest
test 1 joce 0 0 0 0000-00-00 00:00:00 0 1 bug
drop table t1,t2;
CREATE TABLE t1 (a int, b int);
INSERT INTO t1 VALUES (1, 2);
INSERT INTO t1 VALUES (3, 4);
INSERT INTO t1 VALUES (5, NULL);
SELECT * FROM t1 ORDER BY b;
a b
5 NULL
1 2
3 4
SELECT * FROM t1 ORDER BY b DESC;
a b
3 4
1 2
5 NULL
SELECT * FROM t1 ORDER BY (a + b);
a b
5 NULL
1 2
3 4
SELECT * FROM t1 ORDER BY (a + b) DESC;
a b
3 4
1 2
5 NULL
DROP TABLE t1;

14
mysql-test/t/order_by.test
View File

@ -331,3 +331,17 @@ INSERT INTO t2 (numeropost,pseudo) VALUES (1,'joce'),(1,'bug');
SELECT titre,t1.numeropost,auteur,icone,nbrep,0,date,vue,ouvert,lastauteur,dest FROM t2 LEFT JOIN t1 USING(numeropost) WHERE t2.pseudo='joce' ORDER BY date DESC LIMIT 0,30;
SELECT titre,t1.numeropost,auteur,icone,nbrep,'0',date,vue,ouvert,lastauteur,dest FROM t2 LEFT JOIN t1 USING(numeropost) WHERE t2.pseudo='joce' ORDER BY date DESC LIMIT 0,30;
drop table t1,t2;
#
# Test order by with NULL values
#
CREATE TABLE t1 (a int, b int);
INSERT INTO t1 VALUES (1, 2);
INSERT INTO t1 VALUES (3, 4);
INSERT INTO t1 VALUES (5, NULL);
SELECT * FROM t1 ORDER BY b;
SELECT * FROM t1 ORDER BY b DESC;
SELECT * FROM t1 ORDER BY (a + b);
SELECT * FROM t1 ORDER BY (a + b) DESC;
DROP TABLE t1;

11
sql/filesort.cc
View File

@ -456,6 +456,7 @@ static void make_sortkey(register SORTPARAM *param,
sort_field != param->end ;
sort_field++)
{
bool maybe_null=0;
if ((field=sort_field->field))
{ // Field
if (field->maybe_null())
@ -480,7 +481,7 @@ static void make_sortkey(register SORTPARAM *param,
switch (sort_field->result_type) {
case STRING_RESULT:
{
if (item->maybe_null)
if ((maybe_null=item->maybe_null))
*to++=1;
/* All item->str() to use some extra byte for end null.. */
String tmp((char*) to,sort_field->length+4);
@ -546,7 +547,7 @@ static void make_sortkey(register SORTPARAM *param,
case INT_RESULT:
{
longlong value=item->val_int();
if (item->maybe_null)
if ((maybe_null=item->maybe_null))
*to++=1; /* purecov: inspected */
if (item->null_value)
{
@ -580,13 +581,13 @@ static void make_sortkey(register SORTPARAM *param,
case REAL_RESULT:
{
double value=item->val();
if (item->null_value)
if ((maybe_null=item->null_value))
{
bzero((char*) to,sort_field->length+1);
to++;
break;
}
if (item->maybe_null)
if ((maybe_null=item->maybe_null))
*to++=1;
change_double_for_sort(value,(byte*) to);
break;
@ -595,6 +596,8 @@ static void make_sortkey(register SORTPARAM *param,
}
if (sort_field->reverse)
{ /* Revers key */
if (maybe_null)
to[-1]= ~to[-1];
length=sort_field->length;
while (length--)
{