Github user amansinha100 commented on a diff in the pull request: https://github.com/apache/drill/pull/519#discussion_r67602385 --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/planner/logical/partition/PruneScanRule.java --- @@ -269,13 +283,54 @@ protected void doOnMatch(RelOptRuleCall call, Filter filterRel, Project projectR int recordCount = 0; int qualifiedCount = 0; - // Inner loop: within each batch iterate over the PartitionLocations - for(PartitionLocation part: partitions){ - if(!output.getAccessor().isNull(recordCount) && output.getAccessor().get(recordCount) == 1){ - newPartitions.add(part); - qualifiedCount++; + if (checkForSingle && + partitions.get(0).isCompositePartition() /* apply single partition check only for composite partitions */) { + // Inner loop: within each batch iterate over the PartitionLocations + for (PartitionLocation part : partitions) { --- End diff -- Yes, the rule has become too complex. I will go ahead and at least refactor this specific optimization.
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