Abstract: Disclosed are some implementations of systems, apparatus, methods and computer program products for implementing a push strategy in a database system. A filtered subscription associated with a topic channel is received from a client subscriber, where the topic channel is associated with one or more topics, and where the filtered subscription can include a query that indicates values of one or more database fields for which database record data is requested. Database records associated with the topic channel are identified from a transaction log. The database records are further filtered according to the filtered subscription such that a set of filtered database records are obtained. The filtered database records are transmitted via a publisher to the subscriber without receiving a request from the subscriber.

Abstract: Disclosed are some implementations of systems, apparatus, methods and computer program products for implementing a polling command strategy in a database system. A subscriber transmits, to a database system, a subscription to an event. When the database system detects the event, a publisher transmits a message notifying the subscriber of the occurrence of the event. The subscriber processes the message received from the publisher. Responsive to processing the message, the subscriber waits a predefined period of time. After waiting the predefined period of time, the subscriber sends a polling message to the database system. Responsive to the polling message, the subscriber obtains data satisfying the subscription from the database system and the subscriber processes the data.