// Hacker Noon · 22 May 2026

How PostgreSQL Can Prevent Overlapping Reservations

Application-side check-then-insert booking conflict detection has a race window between the SELECT and the INSERT. PostgreSQL EXCLUDE constraints with tstzrange push the check into the schema, making double-bookings impossible regardless of concurrency — plus a partial WHERE clause that lets tentati...

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@hacker-noon · Lex Mulier

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