raghavyadav01 commented on code in PR #18637:
URL: https://github.com/apache/pinot/pull/18637#discussion_r3336469194
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/segment/readers/PinotSegmentColumnReader.java:
##########
@@ -92,7 +96,34 @@ public Dictionary getDictionary() {
}
public int getDictId(int docId) {
- return _forwardIndexReader.getDictId(docId, _forwardIndexReaderContext);
+ if (_forwardIndexReader.isDictionaryEncoded()) {
+ return _forwardIndexReader.getDictId(docId, _forwardIndexReaderContext);
+ }
+ if (_dictionary == null) {
+ throw new UnsupportedOperationException(
+ "Cannot resolve dictId: forward index is raw and no dictionary is
materialized for column: " + (
+ _columnName != null ? _columnName : "<unknown>"));
+ }
+ // If we have separate dictionary on a RAW forward index column, use that
dictionary.
+ switch (_valueType.getStoredType()) {
+ case INT:
+ return _dictionary.indexOf(_forwardIndexReader.getInt(docId,
_forwardIndexReaderContext));
+ case LONG:
+ return _dictionary.indexOf(_forwardIndexReader.getLong(docId,
_forwardIndexReaderContext));
+ case FLOAT:
+ return _dictionary.indexOf(_forwardIndexReader.getFloat(docId,
_forwardIndexReaderContext));
+ case DOUBLE:
+ return _dictionary.indexOf(_forwardIndexReader.getDouble(docId,
_forwardIndexReaderContext));
+ case BIG_DECIMAL:
+ return _dictionary.indexOf(_forwardIndexReader.getBigDecimal(docId,
_forwardIndexReaderContext));
+ case STRING:
+ return _dictionary.indexOf(_forwardIndexReader.getString(docId,
_forwardIndexReaderContext));
+ case BYTES:
+ return _dictionary.indexOf(new
ByteArray(_forwardIndexReader.getBytes(docId, _forwardIndexReaderContext)));
Review Comment:
Perf question: this branch allocates a fresh `byte[]` + `ByteArray` wrapper
per row during the star-tree build (`numDocs × numBytesDims` allocations
total). Have you measured the build-time cost of this path on a representative
segment? Can we optimize?
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