jbimbert commented on a change in pull request #1298: DRILL-5796: Filter 
pruning for multi rowgroup parquet file
URL: https://github.com/apache/drill/pull/1298#discussion_r203966305
 
 

 ##########
 File path: 
exec/java-exec/src/main/java/org/apache/drill/exec/expr/stat/ParquetIsPredicate.java
 ##########
 @@ -114,8 +115,7 @@ public boolean canDrop(RangeExprEvaluator<C> evaluator) {
    */
   private static LogicalExpression createIsTruePredicate(LogicalExpression 
expr) {
     return new ParquetIsPredicate<Boolean>(expr, (exprStat, evaluator) ->
-        //if max value is not true or if there are all nulls  -> canDrop
-        isAllNulls(exprStat, evaluator.getRowCount()) || 
exprStat.hasNonNullValue() && !((BooleanStatistics) exprStat).getMax()
+      exprStat.hasNonNullValue() && !((BooleanStatistics) exprStat).getMax() 
|| isAllNulls(exprStat, evaluator.getRowCount()) ? RowsMatch.NONE : 
checkNull(exprStat)
 
 Review comment:
   OK. Reversed.

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