amrishlal commented on a change in pull request #6776:
URL: https://github.com/apache/incubator-pinot/pull/6776#discussion_r612823972
##########
File path:
pinot-core/src/main/java/org/apache/pinot/core/query/pruner/ColumnValueSegmentPruner.java
##########
@@ -238,6 +237,66 @@ private boolean pruneRangePredicate(IndexSegment segment,
RangePredicate rangePr
return false;
}
+ /**
+ * For IN predicate, segment will not be pruned if the size of values is
greater than threshold
+ * Prune the segment based on:
+ * <ul>
+ * <li>Column min/max value</li>
+ * </ul>
+ * Returns:
+ * <ul>
+ * <li> true if segment can be pruned </li>
+ * <li> false if size of values > threshold or any of the value is greater
than min value or smaller than max value of segment</li>
+ * </ul>
+ */
+ private boolean pruneInPredicate(IndexSegment segment, InPredicate
inPredicate, Map<String, DataSource> dataSourceCache) {
+ String column = inPredicate.getLhs().getIdentifier();
+ DataSource dataSource = dataSourceCache.computeIfAbsent(column,
segment::getDataSource);
+ // NOTE: Column must exist after DataSchemaSegmentPruner
+ assert dataSource != null;
+ DataSourceMetadata dataSourceMetadata = dataSource.getDataSourceMetadata();
+ List<String> values = inPredicate.getValues();
+ //check max threshold value
+ if (values.size() > _inPredicateThreshold) {
+ return false;
+ }
+
+ for (String value : values) {
+ Comparable inValue = convertValue(value,
dataSourceMetadata.getDataType());
+ if (checkMinMaxRange(dataSourceMetadata, inValue)) {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ /**
+ * Check if the comparable value is within min/max range
+ * <ul>
+ * <li>Column min/max value</li>
+ * </ul>
+ * Returns:
+ * <ul>
+ * <li> true if the value is greater than min value or value is smaller
than max value</li>
+ * <li> false if the value is smaller than min value or value is greater
than max value</li>
+ * </ul>
+ */
Review comment:
same here. A single `@return` should be sufficient and will describe
what the function is doing well.
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