Github user heary-cao commented on a diff in the pull request:
https://github.com/apache/spark/pull/21968#discussion_r214293612
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/RowBasedHashMapGenerator.scala
---
@@ -141,11 +151,8 @@ class RowBasedHashMapGenerator(
| if (buckets[idx] == -1) {
| if (numRows < capacity && !isBatchFull) {
| // creating the unsafe for new entry
- |
org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowWriter agg_rowWriter
- | = new
org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowWriter(
- | ${groupingKeySchema.length}, ${numVarLenFields *
32});
| agg_rowWriter.reset(); //TODO: investigate if reset or
zeroout are actually needed
--- End diff --
ok,
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