vrozov commented on a change in pull request #1406: DRILL-6641: Fix
columnValueCounts in ParquetGroupScanStatistics when ParquetGroupScan has
RowGroupInfo without column statistics
URL: https://github.com/apache/drill/pull/1406#discussion_r206192588
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/ParquetGroupScanStatistics.java
##########
@@ -87,19 +91,14 @@ public void collect(List<RowGroupInfo> rowGroupInfos,
ParquetTableMetadataBase p
long rowCount = rowGroup.getRowCount();
for (ColumnMetadata column : rowGroup.getColumns()) {
SchemaPath schemaPath = SchemaPath.getCompoundPath(column.getName());
- Long previousCount = columnValueCounts.get(schemaPath);
- if (previousCount != null) {
- if (previousCount != GroupScan.NO_COLUMN_STATS &&
column.isNumNullsSet()) {
- Long newCount = rowCount - column.getNulls();
- columnValueCounts.put(schemaPath,
columnValueCounts.get(schemaPath) + newCount);
- }
+ MutableLong emptyCount = new MutableLong();
+ MutableLong previousCount =
+ Optional.ofNullable(columnValueCounts.putIfAbsent(schemaPath,
emptyCount))
Review comment:
Usage of `Optional` is not justified here (a fancy way to avoid explicit
comparison to `null` that leads to new object allocation).
----------------------------------------------------------------
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]
With regards,
Apache Git Services
