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d61af348-d259-4238-91fc-d28b9fb67dc4

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Updated5/6/2026

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RELATES_TOComponent

RELATES_TOPackage

PERTAIN_TOReport

PostgreSQL UPDATE with LIMIT requires subquery pattern

PERTAIN_TOProblem

PostgreSQL does not support LIMIT directly in UPDATE statements. — When implementing batch updates (e.g., promoting memory events from short-term to long-term with a batch cap),. Tension: you need a subquery pattern.

PERTAIN_TOSolution

Use UPDATE ... WHERE id IN (SELECT id FROM ... LIMIT $n) pattern. — The subquery selects the IDs with LIMIT, and the outer UPDATE targets only those rows. Tension: All filter predicates go in the inner SELECT. Outcome: Parameters are passed positionally ($1, $2, etc.) and the LIMIT parameter goes last.

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