master
pg_plan_advice: Invent DO_NOT_SCAN(relation_identifier).
Add pg_plan_advice contrib module.
pg_plan_advice: Fix multiple copy-and-paste-errors in test case.
pg_plan_advice: Handle non-repeatable TABLESAMPLE scans.
pg_plan_advice: Fix another unique-semijoin bug.
Fix parsing of underscores in pg_plan_advice occurrence numbers