PostgreSQL Query Rewriting Techniques

PostgreSQL Query Rewriting Techniques The previous articles in this series covered performance problems you fix by adding indexes, restructuring joins, or tuning memory. This one is about the queries where the plan is "fine" — every node is doing something reasonable — but the query itself is asking the wrong question, producing unnecessarily large intermediate results or forcing the planner down a path that a different SQL shape would avoid. These rewrites don't change what the query returns. T