Get any warnings that might describe potential problems with this query.
Note that a query that has warnings is not necessarily incorrect or potentially wrong - because of residual properties,
ModeShape may produce warnings for queries that are perfectly valid.
However, if a query does not give the expected results (during development), check the warnings to see if ModeShape can
suggest specific things to look at. For example, a warnings might suggest that a column might be resolved on a different
selector, or that a column might have been misspelled.