Maybe Query.addFilter() can help you?
http://code.google.com/appengine/docs/java/javadoc/com/google/appengine/api/datastore/Query.html#addFilter%28java.lang.String,%20com.google.appengine.api.datastore.Query.FilterOperator,%20java.lang.Object%29

Just wonder if JPA/JDO can fit into your case:
http://gae-java-persistence.blogspot.com/2009/10/executing-batch-gets.html
The example use keys for batch get, but I think you can apply the same
concept.

On Fri, Apr 30, 2010 at 2:23 PM, dominity <[email protected]> wrote:

> Hi, guys.
>
> Can you tell me how could I add filter to query with OR operation?
> I.e., if I want to fetch all entities that have a field with certain
> value or with another one.
>
> Best regards, Alexander.
>
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