[ 
http://issues.apache.org/jira/browse/JDO-206?page=comments#action_12360759 ] 

Craig Russell commented on JDO-206:
-----------------------------------

The issue here is that Derby treats the FLOAT data type is used to represent 
both single- and double-precision floating point numbers. To get a 
single-precision value in the database, you have to use either REAL data type 
or specify a length on FLOAT. 

Everywhere we really want a 32-bit floating point number to be stored, we need 
to specify REAL or FLOAT(24) as the column type.


> JDOQL test NotEquals comparing floating point numbers
> -----------------------------------------------------
>
>          Key: JDO-206
>          URL: http://issues.apache.org/jira/browse/JDO-206
>      Project: JDO
>         Type: Bug
>   Components: tck20
>     Reporter: Andy Jefferson
>     Assignee: Michael Bouschen
>  Attachments: JDO-206.patch
>
> The current TCK test (carried over from JDO 1.0) for NotEquals, uses != 
> operator on floating point numbers. This is not a good practice, and is 
> unreliable. Its probably the case that the Equals test uses == on the same 
> content, which also is not a good idea (as noted in the latest spec). These 
> tests need reviewing and a reliable alternate strategy adopting

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