-- pg_tre 1.7.0 -> 1.8.0 upgrade.
--
-- No SQL-catalog changes; same on-disk format (v6); no REINDEX
-- required.  1.8.0 rewrites the index BUILD to sort trigram tuples
-- with PostgreSQL's tuplesort, so peak build memory is bounded by
-- maintenance_work_mem (disk-spilled) instead of growing with the
-- corpus -- the field-report OOM is structurally fixed.  The
-- pg_tre.build_max_entries_mb GUC now defaults to 0 (disabled); it
-- remains an optional temp-disk safety valve.
--
--     ALTER EXTENSION pg_tre UPDATE TO '1.8.0';
--
-- after installing the new shared library.  Intentionally empty.