first commit

scripts/verify_schema.sql

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+-- Reports what actually exists in the application schema.
+-- Read-only. Uses information_schema and pg_indexes, both standard views;
+-- no system catalog is written and no object is modified.
+
+\echo '── Applied migration ─────────────────────────────────────────────────'
+SELECT version, dirty FROM schema_migrations;
+
+\echo ''
+\echo '── Tables in the application schema ──────────────────────────────────'
+SELECT table_name
+FROM information_schema.tables
+WHERE table_schema = current_schema() AND table_type = 'BASE TABLE'
+  AND table_name <> 'schema_migrations'
+ORDER BY table_name;
+
+\echo ''
+\echo '── Enum types and their values ───────────────────────────────────────'
+SELECT t.typname AS enum_type,
+       string_agg(e.enumlabel, ', ' ORDER BY e.enumsortorder) AS values
+FROM pg_type t
+JOIN pg_enum e ON e.enumtypid = t.oid
+JOIN pg_namespace n ON n.oid = t.typnamespace
+WHERE n.nspname = current_schema()
+GROUP BY t.typname
+ORDER BY t.typname;
+
+\echo ''
+\echo '── Constraint counts by type ─────────────────────────────────────────'
+SELECT CASE contype
+         WHEN 'p' THEN 'primary key'
+         WHEN 'f' THEN 'foreign key'
+         WHEN 'u' THEN 'unique'
+         WHEN 'c' THEN 'check'
+       END AS constraint_type,
+       count(*) AS total
+FROM pg_constraint c
+JOIN pg_namespace n ON n.oid = c.connamespace
+WHERE n.nspname = current_schema() AND contype IN ('p','f','u','c')
+GROUP BY contype
+ORDER BY contype;
+
+\echo ''
+\echo '── Foreign keys ──────────────────────────────────────────────────────'
+SELECT conrelid::regclass::text AS child,
+       confrelid::regclass::text AS parent,
+       conname AS constraint_name
+FROM pg_constraint c
+JOIN pg_namespace n ON n.oid = c.connamespace
+WHERE n.nspname = current_schema() AND contype = 'f'
+ORDER BY child, parent, conname;
+
+\echo ''
+\echo '── Indexes ───────────────────────────────────────────────────────────'
+SELECT tablename, indexname
+FROM pg_indexes
+WHERE schemaname = current_schema() AND tablename <> 'schema_migrations'
+ORDER BY tablename, indexname;
+
+\echo ''
+\echo '── Objects outside the application schema created by this migration ──'
+\echo '(expected: zero rows)'
+SELECT n.nspname AS schema, c.relname AS object
+FROM pg_class c
+JOIN pg_namespace n ON n.oid = c.relnamespace
+WHERE n.nspname NOT IN ('pg_catalog','information_schema','pg_toast', current_schema())
+  AND c.relkind IN ('r','i','S');