Use the __Stat_total__ pseudo kind
http://code.google.com/appengine/docs/java/datastore/stats.html
On 15 Mar 2010, at 09:36, Robert Lancer wrote:
A query has to specify an entity kind as its minimum parameter, and
then doing a count and seeing if its equal to zero for a known entity
kind would be the best way.
On Mar 13, 1:44 pm, vchalmel <[email protected]> wrote:
hi !
I want to set up an initialization script, and i must, in a first
part, check if the appengine datastore is empty.
I tried to send a query, with :
query.setUnique(true);
if(query.execute()==null)
But it throws a null pointer exception.
How to check that my datastore is empty ?
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