ajantha-bhat commented on a change in pull request #3568: [CARBONDATA-3658]
Prune and Cache only Matched partitioned segments for filter on Partitioned
table
URL: https://github.com/apache/carbondata/pull/3568#discussion_r366136663
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File path:
core/src/main/java/org/apache/carbondata/core/datamap/TableDataMap.java
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@@ -115,11 +115,20 @@ public CarbonTable getTable() {
final List<PartitionSpec> partitions) throws IOException {
final List<ExtendedBlocklet> blocklets = new ArrayList<>();
List<Segment> segments = getCarbonSegments(allsegments);
- final Map<Segment, List<DataMap>> dataMaps =
dataMapFactory.getDataMaps(segments);
+ final Map<Segment, List<DataMap>> dataMaps;
+ if (filter == null || filter.isEmpty() || partitions == null ||
partitions.isEmpty()) {
+ dataMaps = dataMapFactory.getDataMaps(segments);
+ } else {
+ dataMaps = dataMapFactory.getDataMaps(segments, partitions);
+ }
// for non-filter queries
// for filter queries
int totalFiles = 0;
int datamapsCount = 0;
+ // In case if filter has matched partitions, update the segment list
+ if (null != partitions && !partitions.isEmpty()) {
+ segments = new ArrayList<>(dataMaps.keySet());
+ }
Review comment:
move line 117 in else block, because no need to call getCarbonSegments() in
this scenario
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