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## What changes were proposed in this pull request? This adds a metric to parquet scans that measures the time in just the scan phase. This is only possible when the scan returns ColumnarBatches, otherwise the overhead is too high. This combined with the pipeline metric lets us easily see what percent of the time was in the scan. Author: Nong Li <nong@databricks.com> Closes #12007 from nongli/spark-14210. |
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