Github user jinfengni commented on a diff in the pull request: https://github.com/apache/drill/pull/519#discussion_r67709299 --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/planner/logical/partition/PruneScanRule.java --- @@ -320,7 +377,17 @@ protected void doOnMatch(RelOptRuleCall call, Filter filterRel, Project projectR condition = condition.accept(reverseVisitor); pruneCondition = pruneCondition.accept(reverseVisitor); - RelNode inputRel = descriptor.createTableScan(newPartitions); + String cacheFileRoot = null; + if (checkForSingle && isSinglePartition) { + // if metadata cache file could potentially be used, then assign a proper cacheFileRoot + String path = ""; + for (int j = 0; j <= maxIndex; j++) { + path += "/" + spInfo[j]; --- End diff -- Related to Line 313, here we do not check spInfo[j] == null ?
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