yabola commented on code in PR #1023: URL: https://github.com/apache/parquet-mr/pull/1023#discussion_r1102921044
########## parquet-hadoop/src/main/java/org/apache/parquet/filter2/statisticslevel/StatisticsFilter.java: ########## @@ -289,8 +320,14 @@ public <T extends Comparable<T>> Boolean visit(Lt<T> lt) { T value = lt.getValue(); - // drop if value <= min - return stats.compareMinToValue(value) >= 0; + // we are looking for records where v < someValue + if (stats.compareMinToValue(value) >= 0) { + // drop if value <= min + return BLOCK_CANNOT_MATCH; + } else { + // if value > min, we must take it + return BLOCK_MUST_MATCH; Review Comment: I think when `Statistics#hasNonNullValue` marks as true, minMax will be generated by the real data content, and it can represent the real data minMax ( `Statistics#hasNonNullValue` has been processed before.) I think if we can use minMax to judge the `BLOCK_CANNOT_MATCH` , we can also judge the `BLOCK_MUST_MATCH ` in some case. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@parquet.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org