public String getUpdateEventExecutionStatement() {
        return QueryBuilder.update(keyspace, TABLE_EVENT_EXECUTIONS)
                .using(QueryBuilder.ttl(bindMarker()))
                .with(set(PAYLOAD_KEY, bindMarker()))
                .where(eq(MESSAGE_ID_KEY, bindMarker()))
                .and(eq(EVENT_HANDLER_NAME_KEY, bindMarker()))
                .and(eq(EVENT_EXECUTION_ID_KEY, bindMarker()))
                .getQueryString();
    }
@return cql query statement to update an event execution in the "event_executions" table
cassandra-persistence/src/main/java/com/netflix/conductor/cassandra/util/Statements.java