KanakaKumar commented on a change in pull request #3209: [CARBONDATA-3373] Optimize scenes with in numbers in SQL
URL:
https://github.com/apache/carbondata/pull/3209#discussion_r281922869
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File path: core/src/main/java/org/apache/carbondata/core/scan/filter/executer/IncludeFilterExecuterImpl.java
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@@ -272,29 +273,21 @@ private BitSet getFilteredIndexesForMeasures(ColumnPage columnPage,
// Get the measure values from the chunk. compare sequentially with the
// the filter values. The one that matches sets it Bitset.
BitSet bitSet = new BitSet(rowsInPage);
- Object[] filterValues = msrColumnExecutorInfo.getFilterKeys();
-
- SerializableComparator comparator = Comparator.getComparatorByDataTypeForMeasure(msrType);
+ Set filterValuesSet = msrColumnExecutorInfo.getFilterKeysSet();
BitSet nullBitSet = columnPage.getNullBits();
- for (int i = 0; i < filterValues.length; i++) {
- if (filterValues[i] == null) {
- for (int j = nullBitSet.nextSetBit(0); j >= 0; j = nullBitSet.nextSetBit(j + 1)) {
- bitSet.set(j);
- }
- continue;
- }
- for (int startIndex = 0; startIndex < rowsInPage; startIndex++) {
- if (!nullBitSet.get(startIndex)) {
- // Check if filterValue[i] matches with measure Values.
- Object msrValue = DataTypeUtil
- .getMeasureObjectBasedOnDataType(columnPage, startIndex,
- msrType, msrColumnEvaluatorInfo.getMeasure());
-
- if (comparator.compare(msrValue, filterValues[i]) == 0) {
- // This is a match.
- bitSet.set(startIndex);
- }
+ for (int startIndex = 0; startIndex < rowsInPage; startIndex++) {
+ if (!nullBitSet.get(startIndex)) {
+ // Check if filterValue[i] matches with measure Values.
+ Object msrValue = DataTypeUtil
+ .getMeasureObjectBasedOnDataType(columnPage, startIndex,
+ msrType, msrColumnEvaluatorInfo.getMeasure());
+
+ if (filterValuesSet.contains(msrValue)) {
Review comment:
HashSet/Map lookup depends on hashcode . I think this may not match incase of decimal & float value Example. 123.000 & 123.0 comparison with equals would work but hashcode would be different.
I think the optimal approach would be to use TreeMap with comparator by data type [TreeMap(Comparator<? super K> comparator)] which does binary search or sorted filter values.
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