yabola commented on code in PR #1023: URL: https://github.com/apache/parquet-mr/pull/1023#discussion_r1113905243
########## 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: > Dictionary contains the very values from the pages themselves @gszadovszky do you think if it is suitable to use `BLOCK_MUST_MATCH` when all page are encoded in `DictionaryFilter` in some more cases? For example, 1. when search for data = x1 and dictionary has one element = x1 , then return `BLOCK_MUST_MATCH` 2. when search for data > x1 and every elements in dictionary > x1 , then return `BLOCK_MUST_MATCH` -- 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