Hello Mike,
Wednesday, February 28, 2001, 3:55:35 AM, you wrote:
You should know what you can't do direct comparasions between float
number and float const as the number really stored in a database can
be slightly different i.e
355.61999999999999999999999999999999999999999999999999999999999
MM> There seems to be a matching bug in MySQL.
MM> Why will it match if I do a > of a number smaller that is in the
MM> custom_price column, or if I do a strcmp(custom_price, '355.62'), but
MM> will NOT match if I do "WHERE custom_price = '355.62'" OR if I try
MM> "WHERE custom_price = 355.62"? This happens in both 3.23.28-gamma and
MM> the latest 3.23.33. Tested on redhat 6.1,6.2 and 7.0.
MM> Here is an outline of the problem:
mysql>> desc service;
MM>
+------------------+-------------+------+-----+---------------------+----------------+
MM> | Field | Type | Null | Key | Default |
MM> Extra |
MM>
+------------------+-------------+------+-----+---------------------+----------------+
MM> | id | int(10) | | PRI | NULL |
MM> auto_increment |
MM> | accountid | int(10) | | MUL | 0 |
MM> |
MM> | servicetypeid | int(10) | | MUL | 0 |
MM> |
MM> | status | varchar(32) | | | Pending |
MM> |
MM> | date | date | | | 0000-00-00 |
MM> |
MM> | statuschangedate | datetime | | | 0000-00-00 00:00:00 |
MM> |
MM> | addedby | int(10) | | | 0 |
MM> |
MM> | updatedby | int(10) | | | 0 |
MM> |
MM> | referral | varchar(50) | | | |
MM> |
MM> | serverid | int(10) | | | 0 |
MM> |
MM> | chargedate | date | | | 0000-00-00 |
MM> |
MM> | chargeinterval | varchar(5) | | | |
MM> |
MM> | quantity | float(10,1) | | | 0.0 |
MM> |
MM> | chargedsetup | int(1) | | | 0 |
MM> |
MM> | discountid | int(10) | | | 0 |
MM> |
MM> | custom_price | float(10,2) | | | -1.00 |
MM> |
MM>
+------------------+-------------+------+-----+---------------------+----------------+
MM> 16 rows in set (0.00 sec)
MM> (not work)
mysql>> select custom_price from service where accountid = 2625 and
MM> custom_price = '355.62';
MM> Empty set (0.01 sec)
mysql>> select custom_price from service where accountid = 2625 and
MM> custom_price = 355.62;
MM> Empty set (0.00 sec)
MM> (work)
mysql>> select custom_price from service where accountid = 2625 and
custom_price >> '355.61';
MM> +--------------+
MM> | custom_price |
MM> +--------------+
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> +--------------+
MM> 9 rows in set (0.01 sec)
mysql>> select custom_price from service where accountid = 2625 and
MM> strcmp(custom_price,'355.62') = 0;
MM> +--------------+
MM> | custom_price |
MM> +--------------+
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> | 355.62 |
MM> +--------------+
MM> 9 rows in set (0.00 sec)
--
Best regards,
Peter mailto:[EMAIL PROTECTED]
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