matt,
Sunday, May 19, 2002, 6:14:17 PM, you wrote:
m>Description:
m> mysql> describe DLSummary;
m> +------------+------------------+------+-----+---------+-------+
m> | Field | Type | Null | Key | Default | Extra |
m> +------------+------------------+------+-----+---------+-------+
m> | DownloadID | int(10) unsigned | YES | MUL | NULL | |
m> | Year | int(10) unsigned | YES | MUL | NULL | |
m> | YDay | int(10) unsigned | YES | | NULL | |
m> | Count | int(10) unsigned | YES | | NULL | |
m> +------------+------------------+------+-----+---------+-------+
m> 4 rows in set (0.00 sec)
m> mysql> show keys from DLSummary;
m>
+-----------+------------+------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+
m> | Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation |
Cardinality | Sub_part | Packed | Null | Index_type
m> | Comment |
m>
+-----------+------------+------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+
m> | DLSummary | 1 | Date | 1 | Year | A |
1 | NULL | NULL | YES | BTREE
m> | |
m> | DLSummary | 1 | Date | 2 | YDay | A |
377 | NULL | NULL | YES | BTREE
m> | |
m> | DLSummary | 1 | DownloadID | 1 | DownloadID | A |
15378 | NULL | NULL | YES | BTREE
m> | |
m>
+-----------+------------+------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+
m> 3 rows in set (0.01 sec)
m> **** BUG ****
m> mysql> select Year,YDay,sum(Count) from DLSummary group by Year,YDay;
m> ERROR 1062: Duplicate entry '2001-125' for key 1
m> **** BUG ****
m> mysql> select Year,YDay,sum(Count) from DLSummary group by concat(Year,YDay);
m> +------+------+------------+
m> | Year | YDay | sum(Count) |
m> +------+------+------------+
m> | 2001 | 124 | 2140 |
m> | 2001 | 125 | 10302 |
m> .....
m> This seems rather odd. GROUP BY Year,YDay is documented to be topologically
m> equivalent to GROUP BY CONCAT(Year,YDay) (well, more or less) but has
m> functional difference.
m> Bug tested in 4.0.2 @ BK 1.1272 (May 17th) and also on 4.0.2 as of around
m> March 2nd, so it's nothing recent.
It was fixed. Here is a patch for 4.0.2 from Sinisa Milivojevic.
*** tmp/sql_select.cc Wed May 22 19:55:01 2002
--- sql/sql_select.cc Wed May 22 15:11:33 2002
***************
*** 3824,3829 ****
--- 3824,3830 ----
key_part_info->null_offset= (uint) (field->null_ptr -
(uchar*) table->record[0]);
group->field->move_field((char*) ++group->buff);
+ ++group_buff;
}
else
group->field->move_field((char*) group_buff);
>
--
For technical support contracts, goto https://order.mysql.com/?ref=ensita
This email is sponsored by Ensita.net http://www.ensita.net/
__ ___ ___ ____ __
/ |/ /_ __/ __/ __ \/ / Victoria Reznichenko
/ /|_/ / // /\ \/ /_/ / /__ [EMAIL PROTECTED]
/_/ /_/\_, /___/\___\_\___/ MySQL AB / Ensita.net
<___/ www.mysql.com
---------------------------------------------------------------------
Before posting, please check:
http://www.mysql.com/manual.php (the manual)
http://lists.mysql.com/ (the list archive)
To request this thread, e-mail <[EMAIL PROTECTED]>
To unsubscribe, e-mail <[EMAIL PROTECTED]>
Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
