siddharthteotia commented on a change in pull request #6710:
URL: https://github.com/apache/incubator-pinot/pull/6710#discussion_r603710319
##########
File path:
pinot-common/src/main/java/org/apache/pinot/common/utils/DataTable.java
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@@ -80,4 +85,88 @@
double[] getDoubleArray(int rowId, int colId);
String[] getStringArray(int rowId, int colId);
+
+ /* The MetadataKeys is used in V3, where we present metadata as
Map<MetadataKeys, String>
+ * ATTENTION:
+ * - Don't add new key which has same id/name with existing keys. Duplicate
name is not allowed.
+ * - Don't change name of existing keys.
+ * - Don't remove existing keys.
+ * - Always add new keys to the end.
+ * Otherwise, backward compatibility will be broken.
+ */
+ enum MetadataKeys {
+ UNKNOWN("unknown"),
Review comment:
No longer needed based on the comment
https://github.com/apache/incubator-pinot/pull/6710/files#r603639040
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