maytasm commented on a change in pull request #11227:
URL: https://github.com/apache/druid/pull/11227#discussion_r629618963



##########
File path: 
server/src/main/java/org/apache/druid/metadata/IndexerSQLMetadataStorageCoordinator.java
##########
@@ -1423,4 +1424,40 @@ public boolean insertDataSourceMetadata(String 
dataSource, DataSourceMetadata me
             .execute()
     );
   }
+
+  @Override
+  public int removeDataSourceMetadataOlderThan(long timestamp, @Nullable 
Set<String> excludeDatasources)
+  {
+    DateTime dateTime = DateTimes.utc(timestamp);
+    List<String> datasources = connector.getDBI().withHandle(
+        handle -> handle
+            .createQuery(
+                StringUtils.format(
+                    "SELECT dataSource FROM %1$s WHERE created_date < '%2$s'",
+                    dbTables.getDataSourceTable(),
+                    dateTime.toString()
+                )
+            )
+            .mapTo(String.class)
+            .list()
+    );
+    return connector.getDBI().withHandle(

Review comment:
       Added try catch block




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