[fpc-pascal] TSQLQuery UniDirectional and SaveToStream

[LacaK]

Dimitrios Chr. Ioannidis  wrote / napísal(a):
> Hi,
>
> Στις 6/2/2014 9:10 πμ, ο/η LacaK έγραψε:
>> Dimitrios Chr. Ioannidis wrote / napísal(a):
>>> Hi all,
>>>
>>> i will appreciate a little help / advice / anything for the 
>>> following problem i'm having.
>>>
>>> I need to use the xmldatapacketreader to transfer datasets between 
>>> free pascal and delphi.
>>>
>>> The problem i'm having is that i can't use UniDirectional and 
>>> SaveToStream at the same time ( getting 
>>> DataBaseError(SUniDirectional) ) and for big datasets the memory 
>>> goes .....
>>>
>>> So, does anyone have any idea how to use xmldatapacketreader ( which 
>>> implies SaveToStream ) and UniDirectional ?
>>>
>> As you can see there is CheckBiDirectional in the begining of 
>> SaveToStream ...
>> I am not sure, why is there such check (may be that bookmarks are 
>> used and bookmarks are not supported by unidirectional datasets?)
>
> by the way, one of the uses of a unidirectional dataset, is the 
> sequential manipulation of big datasets. One of those manipulation is 
> to transform the data while exporting them. So IMHO it will be nice to 
> undone the invalidation of the SaveToStream method for the 
> UniDirectional datasets.
>
> May be a feature request ?
I think so also ;-)
-Laco.