How do column-level min/max statistics in Parquet files help query engines?
Select an answer to reveal the explanation.
Short Explanation and Infographic
Parquet row groups include min/max statistics per column; query engines use these to apply predicate pushdown — skipping entire row groups that cannot satisfy the WHERE clause — dramatically reducing data scanned.
Full explanation below image
Full Explanation
Parquet row groups include min/max statistics per column; query engines use these to apply predicate pushdown — skipping entire row groups that cannot satisfy the WHERE clause — dramatically reducing data scanned. The incorrect options ("They compress numeric columns more aggressively using delta encoding", "They automatically reorder columns to match the ORDER BY clause", "They enable parallel writes to multiple Parquet files simultaneously") are distractors that don't fully capture the concept described.