Github user xuchuanyin commented on a diff in the pull request: https://github.com/apache/carbondata/pull/2900#discussion_r231012917 --- Diff: hadoop/src/main/java/org/apache/carbondata/hadoop/api/CarbonTableInputFormat.java --- @@ -575,6 +576,8 @@ private BitSet setMatchedPartitions(String partitionIds, Expression filter, */ public BlockMappingVO getBlockRowCount(Job job, CarbonTable table, List<PartitionSpec> partitions) throws IOException { + // no useful information for count star query without filter, so disable explain collector + ExplainCollector.remove(); --- End diff -- please add comments for your modification in the code for better understanding
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