Github user zuyu commented on a diff in the pull request:
https://github.com/apache/incubator-quickstep/pull/185#discussion_r100369492
--- Diff: relational_operators/WorkOrder.proto ---
@@ -44,6 +44,7 @@ enum WorkOrderType {
UPDATE = 20;
WINDOW_AGGREGATION = 21;
DESTROY_AGGREGATION_STATE = 22;
+ BUILD_AGGREGATION_EXISTENCE_MAP = 23;
--- End diff --
Please sort the type in the alphabet order (similarly to
`BuildAggregationExistenceMapWorkOrder` below), and add the following comment
above `enum WorkOrderType {`:
```
// Next tag: 24.
enum WorkOrderType {
```
Recall that this is how Google deals with changing proto definitions. And
`Next tag` is the next available number to assign to a new type. After adding
the new type, we need to increase `Next tag` by one.
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