rongma1997 commented on issue #26137: [SPARK-29490][SQL]Reset 'WritableColumnVector' in 'RowToColumnarExec' URL: https://github.com/apache/spark/pull/26137#issuecomment-542681872 > do we have a unit test? Not yet. I can add one if needed. The default number of rows in one ColumnarBatch is set to 10000 in SQLConf. So this bug is only triggered when the number of rows larger than 10000.
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