clean up

Signed-off-by: bowenlan-amzn <[email protected]>

server/src/main/java/org/opensearch/search/aggregations/bucket/FastFilterRewriteHelper.java

@@ -272,7 +272,7 @@ public void setAggregationType(AggregationType aggregationType) {
         }
 
         public boolean isRewriteable(final Object parent, final int subAggLength) {
-            if (context.maxAggRewriteFilters() == 0) return false;
+            // if (context.maxAggRewriteFilters() == 0) return false;
 
             boolean rewriteable = aggregationType.isRewriteable(parent, subAggLength);
             logger.debug("Fast filter rewriteable: {} for shard {}", rewriteable, context.indexShard().shardId());

server/src/main/java/org/opensearch/search/aggregations/bucket/composite/CompositeAggregator.java

@@ -171,6 +171,7 @@ final class CompositeAggregator extends BucketsAggregator {
             // bucketOrds is used for saving date histogram results
             bucketOrds = LongKeyedBucketOrds.build(context.bigArrays(), CardinalityUpperBound.ONE);
             preparedRounding = ((CompositeAggregationType) fastFilterContext.getAggregationType()).getRoundingPrepared();
+            fastFilterContext.setFieldName(sourceConfigs[0].name());
             fastFilterContext.buildRanges();
         }
     }

server/src/main/java/org/opensearch/search/aggregations/bucket/histogram/AutoDateHistogramAggregator.java

@@ -166,6 +166,7 @@ private AutoDateHistogramAggregator(
             )
         );
         if (fastFilterContext.isRewriteable(parent, subAggregators.length)) {
+            fastFilterContext.setFieldName(valuesSourceConfig.fieldType().name());
             fastFilterContext.buildRanges();
         }
     }

server/src/test/java/org/opensearch/search/aggregations/bucket/histogram/DateHistogramAggregatorTests.java

@@ -822,7 +822,6 @@ public void testNanosIntervalSecond() throws IOException {
             aggregation -> aggregation.calendarInterval(DateHistogramInterval.SECOND).field(AGGREGABLE_DATE).minDocCount(1L),
             histogram -> {
                 List<? extends Histogram.Bucket> buckets = histogram.getBuckets();
-                System.out.println(buckets);
                 assertEquals(3, buckets.size());
 
                 Histogram.Bucket bucket = buckets.get(0);