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_r202062367
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/expr/stat/ParquetBooleanPredicate.java
##########
@@ -46,15 +46,29 @@ private ParquetBooleanPredicate(String name,
List<LogicalExpression> args, Expre
ExpressionPosition pos
) {
return new ParquetBooleanPredicate<C>(name, args, pos) {
+ /**
+ * Evaluates a compound "AND" filter on the statistics of a RowGroup
(the filter reads "filterA and filterB").
+ * Return value :<ul>
+ * <li>ALL : only if all filters return ALL
+ * <li>NONE : if one filter at least returns NONE
+ * <li>SOME : all other cases
+ * </ul>
+ */
@Override
- public boolean canDrop(RangeExprEvaluator<C> evaluator) {
- // "and" : as long as one branch is OK to drop, we can drop it.
+ public RowsMatch matches(RangeExprEvaluator<C> evaluator) {
+ RowsMatch resultMatch = RowsMatch.ALL;
for (LogicalExpression child : this) {
- if (child instanceof ParquetFilterPredicate &&
((ParquetFilterPredicate)child).canDrop(evaluator)) {
- return true;
+ if (child instanceof ParquetFilterPredicate) {
+ switch(((ParquetFilterPredicate) child).matches(evaluator)) {
Review comment:
Done. Checked other occurrences.
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