albertobastos opened a new pull request, #15753:
URL: https://github.com/apache/pinot/pull/15753
When MSE detects an `arrayToMv` operation in an intermediate stage it throws
an error because that function is only supported by leaf stages.
However, the exception thrown (`UnsupportedOperationException`) did not let
the broker to handle the exception properly and return it with enough context
in the response.
This PR changes the Exception thrown to `QueryException` with a
`QUERY_PLANNING_ERROR` code, more suited for that case and making the broker
capable of extracting the actual error message.
It can be tested launching the `MultiEngineQuickStart` and executing the
following query:
~~~sql
SELECT
AirTime
FROM airlineStats
WHERE (
array_to_mv(DivTailNums) IN (
'c5f720f9bb86a59c65ac75581650dbe0',
'f276ee65c0bbd2461d9d3f1ff349f6f7'
)
OR (
array_to_mv(DivTailNums) = 'c749bab35e6243d6e15f9f133988abeb'
AND AirTime IN (
SELECT AirTime
FROM airlineStats
WHERE ArrDelay = 2
)
)
);
~~~
Before:
~~~
InternalError: Error while planning query
~~~
After:
~~~
QueryPlanningError: Function 'ArrayToMv' is not supported in FILTER
Intermediate Stage
~~~
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