[SPARK-36404][SQL] Support ORC nested column vectorized reader for data source v2 #33626
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What changes were proposed in this pull request?
We added support of nested columns in ORC vectorized reader for data source v1. Data source v2 and v1 both use same underlying implementation for vectorized reader (OrcColumnVector), so we can support data source v2 as well.
Why are the changes needed?
Improve query performance for ORC data source v2 when reading nested columns.
Does this PR introduce any user-facing change?
No.
How was this patch tested?
Added test in
OrcQuerySuite.scala.