buzz/scripts/reconcile-schema-after-pgschema.sql

-- Reconcile schema details that pgschema does not preserve.
--
-- pgschema reconciles DDL, but it does not execute seed DML or preserve every
-- table storage parameter from schema/schema.sql. It also currently emits
-- partition children as standalone CREATE TABLE statements. Every pgschema
-- apply caller must run this idempotent script so fresh bootstraps converge on
-- the same live database contract as migration-managed databases.

-- Function-based indexes retain pgschema's temporary schema qualifier in the
-- generated plan. Create this index after functions exist in the real schema.
CREATE INDEX IF NOT EXISTS idx_events_media_hashes
    ON events USING GIN (buzz_media_hashes(content, tags));

DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM pg_index i
        JOIN pg_class c ON c.oid = i.indexrelid
        JOIN pg_am am ON am.oid = c.relam
        WHERE i.indexrelid = 'idx_events_media_hashes'::regclass
          AND i.indrelid = 'events'::regclass AND i.indisvalid
          AND am.amname = 'gin'
          AND pg_get_expr(i.indexprs, i.indrelid) = 'buzz_media_hashes(content, tags)'
    ) THEN
        RAISE EXCEPTION 'events must index media references after pgschema apply';
    END IF;

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'events'::regclass
          AND inhrelid = 'events_p_past'::regclass
    ) THEN
        -- pgschema may copy parent triggers onto standalone children. Drop
        -- those copies before ATTACH; PostgreSQL recreates inherited parent
        -- triggers while attaching and rejects same-named child triggers.
        DROP TRIGGER IF EXISTS events_enqueue_push_match ON events_p_past;
        DROP TRIGGER IF EXISTS events_refresh_channel_ttl ON events_p_past;
        DROP TRIGGER IF EXISTS events_created_at_floor ON events_p_past;
        DROP TRIGGER IF EXISTS community_write_fence_events ON events_p_past;
        DROP TRIGGER IF EXISTS trg_events_guard_channel_roster_snapshot ON events_p_past;
        ALTER TABLE events ATTACH PARTITION events_p_past
            FOR VALUES FROM (MINVALUE) TO ('2026-01-01');
    END IF;

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'events'::regclass
          AND inhrelid = 'events_p2026_01'::regclass
    ) THEN
        DROP TRIGGER IF EXISTS events_enqueue_push_match ON events_p2026_01;
        DROP TRIGGER IF EXISTS events_refresh_channel_ttl ON events_p2026_01;
        DROP TRIGGER IF EXISTS events_created_at_floor ON events_p2026_01;
        DROP TRIGGER IF EXISTS community_write_fence_events ON events_p2026_01;
        DROP TRIGGER IF EXISTS trg_events_guard_channel_roster_snapshot ON events_p2026_01;
        ALTER TABLE events ATTACH PARTITION events_p2026_01
            FOR VALUES FROM ('2026-01-01') TO ('2026-02-01');
    END IF;

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'events'::regclass
          AND inhrelid = 'events_p2026_02'::regclass
    ) THEN
        DROP TRIGGER IF EXISTS events_enqueue_push_match ON events_p2026_02;
        DROP TRIGGER IF EXISTS events_refresh_channel_ttl ON events_p2026_02;
        DROP TRIGGER IF EXISTS events_created_at_floor ON events_p2026_02;
        DROP TRIGGER IF EXISTS community_write_fence_events ON events_p2026_02;
        DROP TRIGGER IF EXISTS trg_events_guard_channel_roster_snapshot ON events_p2026_02;
        ALTER TABLE events ATTACH PARTITION events_p2026_02
            FOR VALUES FROM ('2026-02-01') TO ('2026-03-01');
    END IF;

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'events'::regclass
          AND inhrelid = 'events_p2026_03'::regclass
    ) THEN
        DROP TRIGGER IF EXISTS events_enqueue_push_match ON events_p2026_03;
        DROP TRIGGER IF EXISTS events_refresh_channel_ttl ON events_p2026_03;
        DROP TRIGGER IF EXISTS events_created_at_floor ON events_p2026_03;
        DROP TRIGGER IF EXISTS community_write_fence_events ON events_p2026_03;
        DROP TRIGGER IF EXISTS trg_events_guard_channel_roster_snapshot ON events_p2026_03;
        ALTER TABLE events ATTACH PARTITION events_p2026_03
            FOR VALUES FROM ('2026-03-01') TO ('2026-04-01');
    END IF;

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'events'::regclass
          AND inhrelid = 'events_p2026_04'::regclass
    ) THEN
        DROP TRIGGER IF EXISTS events_enqueue_push_match ON events_p2026_04;
        DROP TRIGGER IF EXISTS events_refresh_channel_ttl ON events_p2026_04;
        DROP TRIGGER IF EXISTS events_created_at_floor ON events_p2026_04;
        DROP TRIGGER IF EXISTS community_write_fence_events ON events_p2026_04;
        DROP TRIGGER IF EXISTS trg_events_guard_channel_roster_snapshot ON events_p2026_04;
        ALTER TABLE events ATTACH PARTITION events_p2026_04
            FOR VALUES FROM ('2026-04-01') TO ('2026-05-01');
    END IF;

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'events'::regclass
          AND inhrelid = 'events_p2026_05'::regclass
    ) THEN
        DROP TRIGGER IF EXISTS events_enqueue_push_match ON events_p2026_05;
        DROP TRIGGER IF EXISTS events_refresh_channel_ttl ON events_p2026_05;
        DROP TRIGGER IF EXISTS events_created_at_floor ON events_p2026_05;
        DROP TRIGGER IF EXISTS community_write_fence_events ON events_p2026_05;
        DROP TRIGGER IF EXISTS trg_events_guard_channel_roster_snapshot ON events_p2026_05;
        ALTER TABLE events ATTACH PARTITION events_p2026_05
            FOR VALUES FROM ('2026-05-01') TO ('2026-06-01');
    END IF;

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'events'::regclass
          AND inhrelid = 'events_p2026_06'::regclass
    ) THEN
        DROP TRIGGER IF EXISTS events_enqueue_push_match ON events_p2026_06;
        DROP TRIGGER IF EXISTS events_refresh_channel_ttl ON events_p2026_06;
        DROP TRIGGER IF EXISTS events_created_at_floor ON events_p2026_06;
        DROP TRIGGER IF EXISTS community_write_fence_events ON events_p2026_06;
        DROP TRIGGER IF EXISTS trg_events_guard_channel_roster_snapshot ON events_p2026_06;
        ALTER TABLE events ATTACH PARTITION events_p2026_06
            FOR VALUES FROM ('2026-06-01') TO ('2026-07-01');
    END IF;

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'events'::regclass
          AND inhrelid = 'events_p_future'::regclass
    ) THEN
        DROP TRIGGER IF EXISTS events_enqueue_push_match ON events_p_future;
        DROP TRIGGER IF EXISTS events_refresh_channel_ttl ON events_p_future;
        DROP TRIGGER IF EXISTS events_created_at_floor ON events_p_future;
        DROP TRIGGER IF EXISTS community_write_fence_events ON events_p_future;
        DROP TRIGGER IF EXISTS trg_events_guard_channel_roster_snapshot ON events_p_future;
        ALTER TABLE events ATTACH PARTITION events_p_future
            FOR VALUES FROM ('2026-07-01') TO (MAXVALUE);
    END IF;

    -- When pgschema creates partition children as standalone tables, it also
    -- preserves the parent's identity column on delivery_log children. PostgreSQL
    -- rejects attaching a child table that has its own identity column, so each
    -- delivery_log attach path drops that standalone identity first. Raw
    -- schema-created partitions are already attached, so these branches do not
    -- run against inherited partition columns.

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'delivery_log'::regclass
          AND inhrelid = 'delivery_log_p_past'::regclass
    ) THEN
        ALTER TABLE delivery_log_p_past ALTER COLUMN id DROP IDENTITY IF EXISTS;
        DROP TRIGGER IF EXISTS community_write_fence_delivery_log ON delivery_log_p_past;
        ALTER TABLE delivery_log ATTACH PARTITION delivery_log_p_past
            FOR VALUES FROM (MINVALUE) TO ('2026-03-01');
    END IF;

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'delivery_log'::regclass
          AND inhrelid = 'delivery_log_p2026_03'::regclass
    ) THEN
        ALTER TABLE delivery_log_p2026_03 ALTER COLUMN id DROP IDENTITY IF EXISTS;
        DROP TRIGGER IF EXISTS community_write_fence_delivery_log ON delivery_log_p2026_03;
        ALTER TABLE delivery_log ATTACH PARTITION delivery_log_p2026_03
            FOR VALUES FROM ('2026-03-01') TO ('2026-04-01');
    END IF;

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'delivery_log'::regclass
          AND inhrelid = 'delivery_log_p2026_04'::regclass
    ) THEN
        ALTER TABLE delivery_log_p2026_04 ALTER COLUMN id DROP IDENTITY IF EXISTS;
        DROP TRIGGER IF EXISTS community_write_fence_delivery_log ON delivery_log_p2026_04;
        ALTER TABLE delivery_log ATTACH PARTITION delivery_log_p2026_04
            FOR VALUES FROM ('2026-04-01') TO ('2026-05-01');
    END IF;

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'delivery_log'::regclass
          AND inhrelid = 'delivery_log_p2026_05'::regclass
    ) THEN
        ALTER TABLE delivery_log_p2026_05 ALTER COLUMN id DROP IDENTITY IF EXISTS;
        DROP TRIGGER IF EXISTS community_write_fence_delivery_log ON delivery_log_p2026_05;
        ALTER TABLE delivery_log ATTACH PARTITION delivery_log_p2026_05
            FOR VALUES FROM ('2026-05-01') TO ('2026-06-01');
    END IF;

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'delivery_log'::regclass
          AND inhrelid = 'delivery_log_p2026_06'::regclass
    ) THEN
        ALTER TABLE delivery_log_p2026_06 ALTER COLUMN id DROP IDENTITY IF EXISTS;
        DROP TRIGGER IF EXISTS community_write_fence_delivery_log ON delivery_log_p2026_06;
        ALTER TABLE delivery_log ATTACH PARTITION delivery_log_p2026_06
            FOR VALUES FROM ('2026-06-01') TO ('2026-07-01');
    END IF;

    IF NOT EXISTS (
        SELECT 1 FROM pg_inherits
        WHERE inhparent = 'delivery_log'::regclass
          AND inhrelid = 'delivery_log_p_future'::regclass
    ) THEN
        ALTER TABLE delivery_log_p_future ALTER COLUMN id DROP IDENTITY IF EXISTS;
        DROP TRIGGER IF EXISTS community_write_fence_delivery_log ON delivery_log_p_future;
        ALTER TABLE delivery_log ATTACH PARTITION delivery_log_p_future
            FOR VALUES FROM ('2026-07-01') TO (MAXVALUE);
    END IF;
END $$;

-- pgschema reconciles DDL but does not apply seed DML or table storage
-- parameters from schema/schema.sql. Restore those parts of the desired-state
-- contract explicitly and fail the bootstrap if the live catalog disagrees.
ALTER TABLE replica_heartbeat SET (vacuum_truncate = false);

INSERT INTO replica_heartbeat (id) VALUES (1)
ON CONFLICT (id) DO NOTHING;

DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1
        FROM pg_class AS relation
        JOIN pg_namespace AS namespace ON namespace.oid = relation.relnamespace
        WHERE namespace.nspname = current_schema()
          AND relation.relname = 'replica_heartbeat'
          AND COALESCE(
              relation.reloptions @> ARRAY['vacuum_truncate=false']::text[],
              false
          )
    ) THEN
        RAISE EXCEPTION 'replica_heartbeat must disable vacuum truncation after pgschema apply';
    END IF;

    IF (SELECT count(*) FROM replica_heartbeat WHERE id = 1) <> 1 THEN
        RAISE EXCEPTION 'replica_heartbeat must contain its singleton row after pgschema apply';
    END IF;
END $$;