dhatchayani commented on a change in pull request #3262: [CARBONDATA-3415]
Merge index is not working for partition table. Merge index for partition table
is taking significantly longer time than normal table.
URL: https://github.com/apache/carbondata/pull/3262#discussion_r291510308
##########
File path:
integration/spark-common/src/main/scala/org/apache/spark/rdd/CarbonMergeFilesRDD.scala
##########
@@ -145,7 +169,7 @@ class CarbonMergeFilesRDD(
if (isHivePartitionedTable) {
CarbonLoaderUtil
.mergeIndexFilesInPartitionedSegment(carbonTable, split.segmentId,
- segmentFileNameToSegmentIdMap.get(split.segmentId))
+ segmentFileNameToSegmentIdMap.get(split.segmentId),
split.partitionPath)
Review comment:
In case of partition table, for a segment we will be writing segment files
for each of the partition as merge index is per partition of a segment.
Finally, we will be merging all the segment files to a single segment file and
the same will be updated to the table status. Same is used here. Executors will
write the segment file for the partition it is handling, at last driver merge
all these segment files of partition to a segment.
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