[daisy] [JIRA] Updated: (DSY-403) More lenient valuetype comparison

[Paul Focke (JIRA)]

     [ http://issues.cocoondev.org//browse/DSY-403?page=all ]

Paul Focke updated DSY-403:
---------------------------

    Attachment: valuetypecompatibility.patch

A first attempt at a solution.
Patch to be applied in the resository/server directory.

> More lenient valuetype comparison
> ---------------------------------
>
>          Key: DSY-403
>          URL: http://issues.cocoondev.org//browse/DSY-403
>      Project: Daisy
>         Type: Improvement
>   Components: Querying and indexing (repository)
>     Versions: public - 2.0
>     Reporter: Paul Focke
>     Priority: Minor
>  Attachments: valuetypecompatibility.patch
>
> At the moment in order to compare values they must be of the exact same valuetype. This occurs in all kinds of comparing query functions like 'between', '>', '<', '=', ... 
> If a measure could be introduced to specify which datatypes are compatible with eachother then comparison functions might be more versatile in their usage.
> Whenever math functions are used in a comparison then errors occur at the moment. Like in the clause '$LongField1 > ContextDoc($LongField2 + 5) ' then $LongField1 will be of type long while 'ContextDoc($LongField2 + 5) ' will be of the type decimal. 
> If it were set somewhere that decimals were compatible with longs and longs compatible with decimals then checking on compatiblity instead of equal valuetypes ought to make the above statement work.
> In the QValueType enum there is already a method available for checking on compatiblity but it is rarely used and quite limited. So expanding this method and using it more might be a possible solution.

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