This transport handler connects directly to the Odysseus system and allows to react on changes in the query plan.
The output of the operator is a tuple containing the following schema:
- ts (STARTTIMESTAMP): The system time stamp in ms the query plan change occured
- queryId (INTEGER): The id of the affected query
- eventType (STRING): The type of event occured. This set is not final, e.g. the following events can occur: QUERY_ADDED, QUERY_REMOVE, QUERY_START, QUERY_STOP, QUERY_SUSPEND, QUERY_RESUME, QUERY_PARTIAL (see Query States for an explantion of the different states)
- user (STRING): The name of the user that changed the query.