AW: [odb-users] Index of member of composite value

[Andreas Pasternak MT-Robot AG]

Thank you!

I guess I missed this part. The problem is that I have autogenerated  
code. So it is going to be hard to implement this syntax. It would be  
great if I could specify the index pragma inside the composite value  
class, as I described below, because there I know which member should  
be indexed, while my code generator doesn't have this information at  
the object class level.

Does someone know if this feature is implemented in the next upcoming release?

Best regards,

Andreas

----------------original message-----------------
From: Marcel Nehring [mne at qosmotec.com  ]
To: odb-users at codesynthesis.com  Date: Fri, 1 Apr 2016 13:49:42 +0000
-------------------------------------------------


> Hi Andreas,
>
> see the ODB manual, section 14.7 "Index Definition Pragmas" (at  
> bottom of page 273):
>
> "It is possible to define an index on a member that is of a  
> composite value type or on some of its nested members."
>
> #pragma db value
> struct point
> {
> int x;
> int y;
> int z;
> };
>
> #pragma db object
> class object
> {
> // An index that includes all of the p1’s nested members.
> //
> #pragma db index
> point p1;
> point p2;
> // An index that includes only p2.x and p2.y.
> //
> #pragma db index("p2_xy_i") members(p2.x, p2.y) };
>
> Regards,
> Marcel
>
> -----Ursprüngliche Nachricht-----
> Von: odb-users-bounces at codesynthesis.com    
> [mailto:odb-users-bounces at codesynthesis.com  ] Im Auftrag von  
> Andreas Pasternak
> Gesendet: Freitag, 1. April 2016 13:22
> An: odb-users at codesynthesis.com   Betreff: [odb-users] Index of  
> member of composite value
>
> Hello all,
>
> Is it possible to make a member of a composite value an index like that?
>
> #pragma db value
> class Foo {
>    #pragma db index
>    int x;
> }
> ODB complains that I am trying to create an index on a non-persistent class.
>
>
> Thank you!
>
> Andreas
>
>
>


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