Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/17436#discussion_r108994791
--- Diff:
sql/core/src/main/java/org/apache/spark/sql/execution/vectorized/ColumnarBatch.java
---
@@ -430,12 +430,15 @@ public int numValidRows() {
/**
* Sets (replaces) the column at `ordinal` with column. This can be used
to do very efficient
* projections.
+ * Note: Caller must ensure that ColumnVector in column[ordinal] is not
used in other places
*/
public void setColumn(int ordinal, ColumnVector column) {
- if (column instanceof OffHeapColumnVector) {
- throw new UnsupportedOperationException("Need to ref count
columns.");
- }
+ ColumnVector oldColumn = columns[ordinal];
columns[ordinal] = column;
+ if (oldColumn instanceof OffHeapColumnVector) {
--- End diff --
Sure, done
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