[
https://issues.apache.org/jira/browse/DRILL-5796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16549479#comment-16549479
]
ASF GitHub Bot commented on DRILL-5796:
---------------------------------------
vrozov commented on a change in pull request #1298: DRILL-5796: Filter pruning
for multi rowgroup parquet file
URL: https://github.com/apache/drill/pull/1298#discussion_r203788769
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/expr/stat/ParquetIsPredicate.java
##########
@@ -114,8 +115,7 @@ public boolean canDrop(RangeExprEvaluator<C> evaluator) {
*/
private static LogicalExpression createIsTruePredicate(LogicalExpression
expr) {
return new ParquetIsPredicate<Boolean>(expr, (exprStat, evaluator) ->
- //if max value is not true or if there are all nulls -> canDrop
- isAllNulls(exprStat, evaluator.getRowCount()) ||
exprStat.hasNonNullValue() && !((BooleanStatistics) exprStat).getMax()
+ exprStat.hasNonNullValue() && !((BooleanStatistics) exprStat).getMax()
|| isAllNulls(exprStat, evaluator.getRowCount()) ? RowsMatch.NONE :
checkNull(exprStat)
Review comment:
Please make sure to keep the original order of expressions unless it needs
to be changed for a reason. If there is a reason to change it here or *in any
other places*, please provide an explanation. I don't see why it needs to be
changed.
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
> Filter pruning for multi rowgroup parquet file
> ----------------------------------------------
>
> Key: DRILL-5796
> URL: https://issues.apache.org/jira/browse/DRILL-5796
> Project: Apache Drill
> Issue Type: Improvement
> Components: Storage - Parquet
> Reporter: Damien Profeta
> Assignee: Jean-Blas IMBERT
> Priority: Major
> Fix For: 1.14.0
>
>
> Today, filter pruning use the file name as the partitioning key. This means
> you can remove a partition only if the whole file is for the same partition.
> With parquet, you can prune the filter if the rowgroup make a partition of
> your dataset as the unit of work if the rowgroup not the file.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
