Kasper Sørensen created METAMODEL-217:
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Summary: Add fallback strategy in JDBC module for queries that are
not rewriteable
Key: METAMODEL-217
URL: https://issues.apache.org/jira/browse/METAMODEL-217
Project: Apache MetaModel
Issue Type: Improvement
Affects Versions: 4.4.1
Reporter: Kasper Sørensen
In our JDBC module we currently rewrite all MetaModel queries into SQL queries
that we submit to the database. This works well and is very effecient ... when
it works.
But there are a few scenarios (and potentially more coming) which don't work.
For instance, we currently don't support rewriting scalar functions of
non-select clauses (this could be improved though) and we don't support custom
aggregation functions either.
So an improvement would be to check the query for these special cases and when
we encounter them, execute the query using MetaModel's query postprocessing
engine instead. This will for sure be more expensive to do, but would retain
compatibility and uniformness across the connectors of MetaModel.
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