-- Tests for the hint table LOAD 'pg_hint_plan'; -- Attempting to use the hint table without the extension created -- emits a WARNING. SET pg_hint_plan.enable_hint_table TO on; SELECT 1; WARNING: cannot use the hint table HINT: Run "CREATE EXTENSION pg_hint_plan" to create the hint table. ?column? ---------- 1 (1 row) SET pg_hint_plan.enable_hint_table TO off; CREATE EXTENSION pg_hint_plan; SET pg_hint_plan.enable_hint_table TO on; SELECT 1; ?column? ---------- 1 (1 row) SET pg_hint_plan.enable_hint_table TO off; DROP EXTENSION pg_hint_plan;