Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/20277#discussion_r161816826 --- Diff: sql/core/src/main/java/org/apache/spark/sql/vectorized/ArrowColumnVector.java --- @@ -28,21 +28,14 @@ /** * A column vector backed by Apache Arrow. */ -public final class ArrowColumnVector extends ColumnVector { +public final class ArrowColumnVector implements ColumnVector { private final ArrowVectorAccessor accessor; private ArrowColumnVector[] childColumns; - private void ensureAccessible(int index) { --- End diff -- `ColumnVector` is a performance critical place, we don't need index checking here, like other column vector implementations.
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