snleee commented on a change in pull request #7878:
URL: https://github.com/apache/pinot/pull/7878#discussion_r764411941



##########
File path: 
pinot-controller/src/main/java/org/apache/pinot/controller/api/resources/PinotSegmentRestletResource.java
##########
@@ -166,14 +166,16 @@
   @ApiOperation(value = "List all segments", notes = "List all segments")
   public List<Map<TableType, List<String>>> getSegments(
       @ApiParam(value = "Name of the table", required = true) 
@PathParam("tableName") String tableName,
-      @ApiParam(value = "OFFLINE|REALTIME") @QueryParam("type") String 
tableTypeStr) {
+      @ApiParam(value = "OFFLINE|REALTIME") @QueryParam("type") String 
tableTypeStr,
+      @ApiParam(value = "Whether live only segments will be returned") 
@QueryParam("liveOnly") String liveOnly) {

Review comment:
       I think that we need to add more explanation on what does it mean by 
`live segments`. 

##########
File path: 
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/PinotHelixResourceManager.java
##########
@@ -617,12 +622,21 @@ public String getCrypterClassNameFromTableConfig(String 
tableNameWithType) {
         }
       }
     }
+    return retainLiveSegments(tableNameWithType, selectedSegments);
+  }
+
+  /**
+   * Given the list of segment names, retains live segments which are queried.
+   * @param tableNameWithType table name with type
+   * @param segments list of input segment names
+   */
+  private List<String> retainLiveSegments(String tableNameWithType, 
List<String> segments) {

Review comment:
       `computeLiveSegments`? 




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