-- pg_trickle 0.2.3 -> 0.3.0 upgrade script
--
-- v0.3.0 is a correctness and hardening release with no catalog schema changes:
--
--   DVM correctness fixes (DC1-DC4):
--     - HAVING threshold-crossing differential correctness (COUNT(*) rewrite,
--       per-group rescan on upward threshold crossing)
--     - FULL OUTER JOIN differential correctness (row-id mismatch, compound
--       GROUP BY expression resolution/quoting, SUM NULL semantics, rescan CTE)
--     - Correlated EXISTS with HAVING differential correctness (parser GROUP BY
--       /HAVING handling, SemiJoin row-id, diff_project recomputation)
--     - Correlated scalar subquery differential correctness (rewrite to LEFT JOIN
--       before DVM parsing; inner table qualifier stripping)
--
--   Scheduler hardening:
--     - BGW detection uses backend_type instead of application_name (PG 18)
--     - Launcher thundering-herd prevention on DAG signal
--
--   SAST program (Phases 1-3): CodeQL, cargo-deny, Semgrep, unsafe inventory
--
--   TPC-H test suite enhancements (T1-T6): rollback, mode-comparison,
--     single-row mutations, DAG chain / multi-parent tests
--
-- No catalog tables, columns, functions, or views were added or removed.
-- ALTER EXTENSION pg_trickle UPDATE is a no-op for schema objects.

-- (intentionally empty — all changes are internal to the compiled .so)