tomvanbussel opened a new pull request #33108:
URL: https://github.com/apache/spark/pull/33108
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### What changes were proposed in this pull request?
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This PR fixes support for arrays and maps in `RowToColumnConverter`. In
particular this PR fixes two issues:
1. `appendArray` in `WritableColumnVector` does not reserve any elements in
its child arrays, which causes the assertion in `OffHeapColumnVector.putArray`
to fail.
2. The nullability of the child columns is propagated incorrectly when
creating the child converters of `ArrayConverter` and `MapConverter` in
`RowToColumnConverter`.
This PR fixes these issues.
### Why are the changes needed?
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Both bugs cause an exception to be thrown.
### Does this PR introduce _any_ user-facing change?
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No
### How was this patch tested?
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I added additional test cases to `ColumnVectorSuite` to catch the first bug,
and I added `RowToColumnConverterSuite` to catch the both bugs (but
specifically the second).
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