jackjlli commented on a change in pull request #3336: Add metadata info and
metric when querying non-existing columns
URL: https://github.com/apache/incubator-pinot/pull/3336#discussion_r237222545
##########
File path:
pinot-core/src/main/java/com/linkedin/pinot/core/query/executor/ServerQueryExecutorV1Impl.java
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@@ -143,6 +147,22 @@ public DataTable processQuery(ServerQueryRequest
queryRequest, ExecutorService e
metadata.put(DataTable.NUM_ENTRIES_SCANNED_POST_FILTER_METADATA_KEY,
"0");
metadata.put(DataTable.NUM_SEGMENTS_PROCESSED, "0");
metadata.put(DataTable.NUM_SEGMENTS_MATCHED, "0");
+
+ // adds pruning reasons to metadata.
+ StringBuilder pruningReasons = new StringBuilder();
+ for (SegmentPruner segmentPruner : matchedSegmentPruners) {
+ // emits metric when querying non-existing columns.
+ if ("DataSchemaSegmentPruner".equals(segmentPruner.toString())) {
Review comment:
Yeah, putting the check to broker side seems to be the right place.
In that case, `DataSchemaSegmentPruner` would be useless.
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