Deprecate derived DbEntity and all associated API's - schedule for removal in
3.0M3
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Key: CAY-857
URL: https://issues.apache.org/cayenne/browse/CAY-857
Project: Cayenne
Issue Type: Task
Components: Cayenne Core Library
Affects Versions: 3.0
Reporter: Andrus Adamchik
Assignee: Andrus Adamchik
Fix For: 3.0
DerivedDbEntity was an attempt to map aggregate queries as entities. It is very
limited in that only aggregation within a single table is supported; its
mapping is somewhat complicated; it is rarely used in practice; and we've
already warned the users over the years on the mailing list that it is going
away, so it's use was discouraged all along. The plan is to deprecate the
corresponding API in 3.0M2 and remove it in 3.0M3. Deprecation visible to the
user will affect SelectQuery.
While there is no direct replacement, EJBQL scalar queries can help selecting
aggregated value.
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