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https://issues.apache.org/jira/browse/DRILL-5796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16554456#comment-16554456
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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_r204817724
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/ParquetPushDownFilter.java
##########
@@ -165,12 +167,29 @@ protected void doOnMatch(RelOptRuleCall call, FilterPrel
filter, ProjectPrel pro
return;
}
-
RelNode newScan = ScanPrel.create(scan, scan.getTraitSet(), newGroupScan,
scan.getRowType());;
if (project != null) {
newScan = project.copy(project.getTraitSet(), ImmutableList.of(newScan));
}
+
+ if (newGroupScan instanceof AbstractParquetGroupScan) {
+ RowsMatch matchAll = RowsMatch.ALL;
+ List<RowGroupInfo> rowGroupInfos = ((AbstractParquetGroupScan)
newGroupScan).rowGroupInfos;
+ for (RowGroupInfo rowGroup : rowGroupInfos) {
+ if (rowGroup.getRowsMatch() != RowsMatch.ALL) {
+ matchAll = RowsMatch.SOME;
+ break;
+ }
+ }
+ if (matchAll == ParquetFilterPredicate.RowsMatch.ALL) {
+ call.transformTo(newScan);
+ }
+ } else {
+ final RelNode newFilter = filter.copy(filter.getTraitSet(),
ImmutableList.<RelNode>of(newScan));
+ call.transformTo(newFilter);
+ }
+
final RelNode newFilter = filter.copy(filter.getTraitSet(),
ImmutableList.<RelNode>of(newScan));
Review comment:
How it works in case `newGroupScan` is not an instance of
`AbstractParquetGroupScan`? Will not `filter.copy` be called twice?
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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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