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15 июля 2018 г., 19:01
However, in most... «Designing Data-Intensive Applications: The Big Ideas Behind Reliable, Scalable, and Maintainable Systems»
However, in most programming languages you cannot subscribe to changes in a mutable variable—you can only read it periodically. <...>
Databases have inherited this passive approach to mutable data: if you want to find out whether the content of the database has changed, often your only option is to poll (i.e., to repeat your query periodically). Subscribing to changes is only just beginning to emerge as a feature.
