vrozov 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_r203788769
##########
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:
Please make sure to keep the original order of expressions unless it needs
to be changed for a reason. If there is a reason to change it here or *in any
other places*, please provide an explanation. I don't see why it needs to be
changed.
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