Github user jackylk commented on a diff in the pull request: https://github.com/apache/carbondata/pull/916#discussion_r117388756 --- Diff: hadoop/src/main/java/org/apache/carbondata/hadoop/CarbonInputFormat.java --- @@ -255,11 +258,32 @@ private static AbsoluteTableIdentifier getAbsoluteTableIdentifier(Configuration if (null == carbonTable) { throw new IOException("Missing/Corrupt schema file for table."); } + CarbonInputFormatUtil.processFilterExpression(filter, carbonTable); + + // prune partitions for filter query on partition table + BitSet partitionMap = null; + if (null != filter) { + PartitionInfo partitionInfo = carbonTable.getPartitionInfo(carbonTable.getFactTableName()); + if (null != partitionInfo) { + Partitioner partitioner = PartitionUtil.getPartitioner(partitionInfo); + partitionMap = new FilterExpressionProcessor() + .getFilteredPartitions(filter, partitionInfo, partitioner); + if (partitionMap.cardinality() == 0) { + // no partition is required + return new ArrayList<InputSplit>(); + } + if (partitionMap.cardinality() == partitioner.numPartitions()) { --- End diff -- I feel it is more readable to use BitSet with all `1` than `null`
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