klsince commented on a change in pull request #8035:
URL: https://github.com/apache/pinot/pull/8035#discussion_r787134366
##########
File path:
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/segment/index/loader/bloomfilter/BloomFilterHandler.java
##########
@@ -65,9 +65,25 @@ public BloomFilterHandler(SegmentMetadata segmentMetadata,
IndexLoadingConfig in
@Override
public boolean needUpdateIndices(SegmentDirectory.Reader segmentReader) {
+ String segmentName = _segmentMetadata.getName();
Set<String> columnsToAddBF = new HashSet<>(_bloomFilterConfigs.keySet());
Set<String> existingColumns =
segmentReader.toSegmentDirectory().getColumnsWithIndex(ColumnIndexType.BLOOM_FILTER);
- return !existingColumns.equals(columnsToAddBF);
+ // Check if any existing bloomfilter need to be removed.
+ for (String column : existingColumns) {
+ if (!columnsToAddBF.remove(column)) {
+ LOGGER.debug("Need to remove existing bloom filter from segment: {},
column: {}", segmentName, column);
+ return true;
+ }
+ }
+ // Check if any new bloomfilter need to be added.
+ for (String column : columnsToAddBF) {
+ ColumnMetadata columnMetadata =
_segmentMetadata.getColumnMetadataFor(column);
+ if (columnMetadata != null && columnMetadata.hasDictionary()) {
Review comment:
Excellent point!
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