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PostgreSQL's multirange types (available since version 14) can dramatically simplify complex booking and availability logic by treating time constraints as mathematical set operations. A case study from RIZAP Technologies demonstrates how chocoZAP's flexible reservation system—which allows arbitrary time intervals instead of fixed slots—uses multirange to compute availability through set difference operations. The approach involves aggregating unavailable periods into multiranges, performing subtraction in SQL, and exposing results through Rails views, eliminating tangled conditional logic while improving performance and maintainability.

Range on Rails: How PostgreSQL Multirange Turned Complex Booking Logic into Elegant Simplicity

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