Hi,
I have the following query with inequality operators on a single
property:
query = pm.newQuery(File.class);
query.setFilter("dueDate >= beginDateParam && dueDate <=
endDateParam");
List<File> storedFiles = (List<File>)query.executeWithArray(begin,
end);
Runtime is throwing this exception:
java.lang.RuntimeException:
org.datanucleus.store.appengine.query.DatastoreQuery
$UnsupportedDatastoreFeatureException: Problem with query <SELECT FROM
Flow WHERE dueDate >= beginDateParam && dueDate <= endDateParam>:
Operator >= cannot be used as part of the join condition. Use
'contains' if joining on a Collection field and equality if joining on
a single-value field.
AppEngine documentation clearly says it supports inequality operators
on a single property. Following is the quote from the documentation:
Inequality Filters Are Allowed On One Property Only
A query may only use inequality filters (<, <=, >=, >, !=) on one
property across all of its filters.
For example, this query is allowed:
select from Person where birthYear >= minBirthYearParam
&& birthYear <= maxBirthYearParam
Can anyone with App Engine experience please explain whats wrong with
this query?
Thanks
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