amrishlal commented on a change in pull request #6710: URL: https://github.com/apache/incubator-pinot/pull/6710#discussion_r605325237
########## File path: pinot-common/src/main/java/org/apache/pinot/common/utils/DataTable.java ########## @@ -80,4 +85,85 @@ double[] getDoubleArray(int rowId, int colId); String[] getStringArray(int rowId, int colId); + + /* The MetadataKey is used in V3, where we present metadata as Map<MetadataKey, String> + * ATTENTION: + * - Don't change existing keys. + * - Don't remove existing keys. + * - Always add new keys to the end. + * Otherwise, backward compatibility will be broken. + */ + enum MetadataKey { + UNKNOWN("unknown"), + TABLE("table"), // NOTE: this key is only used in PrioritySchedulerTest + NUM_DOCS_SCANNED("numDocsScanned"), + NUM_ENTRIES_SCANNED_IN_FILTER("numEntriesScannedInFilter"), + NUM_ENTRIES_SCANNED_POST_FILTER("numEntriesScannedPostFilter"), + NUM_SEGMENTS_QUERIED("numSegmentsQueried"), + NUM_SEGMENTS_PROCESSED("numSegmentsProcessed"), + NUM_SEGMENTS_MATCHED("numSegmentsMatched"), + NUM_CONSUMING_SEGMENTS_PROCESSED("numConsumingSegmentsProcessed"), + MIN_CONSUMING_FRESHNESS_TIME_MS("minConsumingFreshnessTimeMs"), + TOTAL_DOCS("totalDocs"), + NUM_GROUPS_LIMIT_REACHED("numGroupsLimitReached"), + TIME_USED_MS("timeUsedMs"), + TRACE_INFO("traceInfo"), + REQUEST_ID("requestId"), + NUM_RESIZES("numResizes"), + RESIZE_TIME_MS("resizeTimeMs"), + THREAD_CPU_TIME_NS("threadCpuTimeNs"); + + private static final Map<String, MetadataKey> _nameToEnumKeyMap = new HashMap<>(); + // _intValueMetadataKey contains all metadata keys which has value of int type. + private static final Set<MetadataKey> _intValueMetadataKey = ImmutableSet + .of(MetadataKey.NUM_SEGMENTS_QUERIED, MetadataKey.NUM_SEGMENTS_PROCESSED, MetadataKey.NUM_SEGMENTS_MATCHED, + MetadataKey.NUM_RESIZES, MetadataKey.NUM_CONSUMING_SEGMENTS_PROCESSED, MetadataKey.NUM_RESIZES); + // _longValueMetadataKey contains all metadata keys which has value of long type. Review comment: Why do we need _intValueMetadataKey and _longValueMetadataKey? Instead of maintaining two static maps to decide which parameter is long and which is int, can we add a member variable `_type` for each of the enum options? This will also allow for replacing `isIntValueMetadataKey()` and `isLongValueMetadataKey()` functions with `getType()`? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@pinot.apache.org For additional commands, e-mail: commits-h...@pinot.apache.org