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https://issues.apache.org/jira/browse/DRILL-5796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16513967#comment-16513967
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ASF GitHub Bot commented on DRILL-5796:
---------------------------------------
jbimbert 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_r195776915
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/expr/stat/RangeExprEvaluator.java
##########
@@ -259,17 +259,26 @@ public long getRowCount() {
final ValueHolder maxFuncHolder =
InterpreterEvaluator.evaluateFunction(interpreter, args2, holderExpr.getName());
switch (destType) {
- //TODO : need handle # of nulls.
case INT:
- return getStatistics( ((IntHolder)minFuncHolder).value,
((IntHolder)maxFuncHolder).value);
+ Statistics si = getStatistics( ((IntHolder)minFuncHolder).value,
((IntHolder)maxFuncHolder).value);
+ si.setNumNulls(input.getNumNulls());
Review comment:
Possible? Can you explain?
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> 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.
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