Hey folks,

I'm adding an optional feature to my DSV2 connector where it can choose
between a row-based or columnar PartitionReader dynamically depending on a
query's schema. I'd like to be able to supply a hint at query time that's
visible to the connector, but at the moment I can't see any way to
accomplish that.

>From what I can see the artifacts produced by the existing hint system [
https://spark.apache.org/docs/latest/sql-ref-syntax-qry-select-hints.html
or sql("select 1").hint("foo").show()] aren't visible from the
TableCatalog/Table/ScanBuilder.

I guess I could set a config parameter but I'd rather do this on a
per-query basis. Any tips?

Thanks!

-0xe1a

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