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Add inverted-index-based distinct operator with runtime cost heuristic #17872

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Add inverted-index-based distinct operator with runtime cost heuristic #17872

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955e3fc
Add inverted-index-based distinct operator with runtime cost heuristic
xiangfu0 Mar 13, 2026
a0555ca
Simplify DistinctOperator to single constructor with internal eligibi…
xiangfu0 Mar 13, 2026
a07cedf
Fix CI failures: eagerly create ProjectOperator when inverted index i…
xiangfu0 Mar 13, 2026
a1219f4
Separate InvertedIndexDistinctOperator from DistinctOperator for back…
xiangfu0 Mar 13, 2026
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17 changes: 17 additions & 0 deletions pinot-common/src/main/java/org/apache/pinot/common/utils/config/QueryOptionsUtils.java
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Original file line number Diff line number Diff line change
Expand Up @@ -165,6 +165,23 @@ public static boolean isSkipStarTree(Map<String, String> queryOptions) {
return "false".equalsIgnoreCase(queryOptions.get(QueryOptionKey.USE_STAR_TREE));
}

/**
* Returns true if the inverted-index-based distinct operator should be used.
*/
public static boolean isUseInvertedIndexDistinct(Map<String, String> queryOptions) {
return Boolean.parseBoolean(queryOptions.get(QueryOptionKey.USE_INVERTED_INDEX_DISTINCT));
}

/**
* Returns the cost ratio for the inverted-index-based distinct heuristic, or null if not set.
* The inverted index path is chosen when dictionaryCardinality * costRatio <= filteredDocCount.
*/
@Nullable
public static Integer getInvertedIndexDistinctCostRatio(Map<String, String> queryOptions) {
return checkedParseIntPositive("invertedIndexDistinctCostRatio",
queryOptions.get(QueryOptionKey.INVERTED_INDEX_DISTINCT_COST_RATIO));
}

public static boolean isSkipScanFilterReorder(Map<String, String> queryOptions) {
return "false".equalsIgnoreCase(queryOptions.get(QueryOptionKey.USE_SCAN_REORDER_OPTIMIZATION));
}
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