viirya commented on code in PR #52747:
URL: https://github.com/apache/spark/pull/52747#discussion_r2475219755
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/execution/arrow/ArrowWriterWrapper.scala:
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@@ -60,6 +60,13 @@ case class ArrowWriterWrapper(
allocator = null
}
}
+
+ /**
+ * Clear the underlying VectorSchemaRoot to release the memory held by the
vectors.
Review Comment:
`clear` and `close` are same on `FieldVector`. `VectorSchemaRoot.clear`
additionally resets its `rowCount`, so yes, `VectorSchemaRoot` can be reused
after `clear`.
```
/** Alternative to clear(). Allows use as an AutoCloseable in
try-with-resources. */
@Override
void close();
```
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