[GitHub] arina-ielchiieva commented on a change in pull request #1552: DRILL-6865: Query returns wrong result when filter pruning happens

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arina-ielchiieva commented on a change in pull request #1552:  DRILL-6865: Query returns wrong result when filter pruning happens
URL: https://github.com/apache/drill/pull/1552#discussion_r235949907
 
 

 ##########
 File path: exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/ParquetPushDownFilter.java
 ##########
 @@ -172,14 +170,30 @@ protected void doOnMatch(RelOptRuleCall call, FilterPrel filter, ProjectPrel pro
 
 
     Stopwatch timer = logger.isDebugEnabled() ? Stopwatch.createStarted() : null;
-    final GroupScan newGroupScan = groupScan.applyFilter(conditionExp, optimizerContext,
+    AbstractParquetGroupScan newGroupScan = groupScan.applyFilter(conditionExp, optimizerContext,
         optimizerContext.getFunctionRegistry(), optimizerContext.getPlannerSettings().getOptions());
     if (timer != null) {
       logger.debug("Took {} ms to apply filter on parquet row groups. ", timer.elapsed(TimeUnit.MILLISECONDS));
       timer.stop();
     }
 
-    if (newGroupScan == null ) {
+    if (newGroupScan == null) {
+      if (groupScan.isMatchAllRowGroups()) {
+        RelNode child = project == null ? scan : project;
+        // if current row group fully matches filter,
+        // but row group pruning wasn't happened, removes filter.
 
 Review comment:
   did not happen, remove the filter

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