Spark: Better statistics estimation for spark2 Reader. #3134
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Follow-up to apache#3038. Use (estimated) row size * number of rows to estimate the size instead of adding up file sizes. The row size is estimated from the pruned schema if we prune columns.
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Follow-up to #3038. Fixes #3108.
Use (estimated) row size * number of rows to estimate the size instead of adding up file sizes.
The row size is estimated from the pruned schema if we prune columns.