yes indeed. I will have to change my column definitions.
However, this behavior was not the case with 4.0.4. What seemed to be going on with that branch was I could have an 11 digit number, with a maximum of 9 digits behind the decimal. so numbers like 100493.43 were fine. I'm assuming that this was a bug that was then fixed, and I just happened to get nipped by it.
jeff Dan Nelson wrote:
In the last episode (Aug 05), Jeff Mathis said:
after lokking at this, it appears that our float(11,9) columns cannot store an number larger than 100 or smaller than -100. the database is rounding the number! If we insert numbers -100 < x < 100, then its fine.
is there a configuration setting somewhere, or is this a known bug?
It's doing exactly what you asked for.
`FLOAT[(M,D)] [UNSIGNED] [ZEROFILL]' `M' is the display width and `D' is the number of decimals.
You asked for a field 11 digits wide, with 9 of them being to the right
of the decimal point. 11-9 = 2, so you really should only be able to
store -99 through 99, since 100 is 3 digits and puts you over the edge. So you did find a mysql bug, but not the one you thought you had :)
mysql> create table test ( f1 float(11,9) ); Query OK, 0 rows affected (0.07 sec)
mysql> insert into test values (1.1234567890123),(100.1234567890123),(200.123456789); Query OK, 3 rows affected, 2 warnings (0.09 sec) Records: 3 Duplicates: 0 Warnings: 2
mysql> show warnings; +---------+------+-------------------------------------------------------+ | Level | Code | Message | +---------+------+-------------------------------------------------------+ | Warning | 1264 | Data truncated; out of range for column 'f1' at row 2 | | Warning | 1264 | Data truncated; out of range for column 'f1' at row 3 | +---------+------+-------------------------------------------------------+ 2 rows in set (0.00 sec)
mysql> select * from test; +---------------+ | f1 | +---------------+ | 1.123456836 | | 100.000000000 | | 100.000000000 | +---------------+ 3 rows in set (0.00 sec)
This odd rounding is due to the low precision of a 'float' type (usually around 6 decimal digits).
-- Jeff Mathis, Ph.D. 505-955-1434 Prediction Company [EMAIL PROTECTED] 525 Camino de los Marquez, Ste 6 http://www.predict.com Santa Fe, NM 87505
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