Persistent Class - get_persistent_by_query

Hi everybody out there,

I created a persistent class and want to get a few items by query. Because I have a selection screen and this was the way I did it by using SELECT-commands, I created a query like this: 'CARRID IN S_CARRID AND CONNID IN S_CONNID' - s_carrid and s_connid are ranges of the fields carrid and connid. This does not work, probably because "in" is not a native SQL command.

But how I have to rewrite the code? In fact, there is a selection screen and I have my query-parts in this ranges.

I hope you can help me....

Kind Regards

Ralf