buzz/scripts/attach-schema-partitions.sql

-- Attach partition child tables after pgschema apply.
--
-- pgschema currently emits existing partition children as standalone CREATE TABLE
-- statements when applying schema/schema.sql in CI. The tables exist, but they
-- are not attached to their partitioned parents, so inserts into events or
-- delivery_log fail with "no partition of relation ... found for row". Keep this
-- idempotent: raw psql/schema.sql already attaches these partitions, while
-- pgschema-created schemas need this repair step.

DO $$
BEGIN
    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
        -- (both the push-match trigger and the replica-fence floor guard).
        DROP TRIGGER IF EXISTS events_enqueue_push_match ON events_p_past;
        DROP TRIGGER IF EXISTS events_created_at_floor 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_created_at_floor 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_created_at_floor 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_created_at_floor 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_created_at_floor 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_created_at_floor 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_created_at_floor 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_created_at_floor 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;
        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;
        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;
        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;
        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;
        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;
        ALTER TABLE delivery_log ATTACH PARTITION delivery_log_p_future
            FOR VALUES FROM ('2026-07-01') TO (MAXVALUE);
    END IF;
END $$;