Is it impossible to filter elements when retrieving over 4000 values from a PostgreSQL database through Reactive streams?

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No, it is not impossible to filter elements when retrieving over 4000 values from a PostgreSQL database through Reactive streams. Reactive streams provide operators such as filter(), map(), reduce(), and many others that allow you to manipulate the data stream by applying certain operations on it. You can use the filter() operator to select only the required elements from the data stream based on certain criteria. The reactive streams approach of processing data allows for efficient handling of large amounts of data, making it possible to filter even over 4000 values efficiently.