trying to rework database migrations

migrations/20250101000008_worker_notification.sql

@@ -0,0 +1,75 @@
+-- Migration: Supporting Tables and Indexes
+-- Description: Creates notification and artifact tables plus performance optimization indexes
+-- Version: 20250101000005
+
+
+-- ============================================================================
+-- NOTIFICATION TABLE
+-- ============================================================================
+
+CREATE TABLE notification (
+    id BIGSERIAL PRIMARY KEY,
+    channel TEXT NOT NULL,
+    entity_type TEXT NOT NULL,
+    entity TEXT NOT NULL,
+    activity TEXT NOT NULL,
+    state notification_status_enum NOT NULL DEFAULT 'created',
+    content JSONB,
+    created TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+-- Indexes
+CREATE INDEX idx_notification_channel ON notification(channel);
+CREATE INDEX idx_notification_entity_type ON notification(entity_type);
+CREATE INDEX idx_notification_entity ON notification(entity);
+CREATE INDEX idx_notification_state ON notification(state);
+CREATE INDEX idx_notification_created ON notification(created DESC);
+CREATE INDEX idx_notification_channel_state ON notification(channel, state);
+CREATE INDEX idx_notification_entity_type_entity ON notification(entity_type, entity);
+CREATE INDEX idx_notification_state_created ON notification(state, created DESC);
+CREATE INDEX idx_notification_content_gin ON notification USING GIN (content);
+
+-- Trigger
+CREATE TRIGGER update_notification_updated
+    BEFORE UPDATE ON notification
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_column();
+
+-- Function for pg_notify on notification insert
+CREATE OR REPLACE FUNCTION notify_on_insert()
+RETURNS TRIGGER AS $$
+DECLARE
+    payload TEXT;
+BEGIN
+    -- Build JSON payload with id, entity, and activity
+    payload := json_build_object(
+        'id', NEW.id,
+        'entity_type', NEW.entity_type,
+        'entity', NEW.entity,
+        'activity', NEW.activity
+    )::text;
+
+    -- Send notification to the specified channel
+    PERFORM pg_notify(NEW.channel, payload);
+
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- Trigger to send pg_notify on notification insert
+CREATE TRIGGER notify_on_notification_insert
+    AFTER INSERT ON notification
+    FOR EACH ROW
+    EXECUTE FUNCTION notify_on_insert();
+
+-- Comments
+COMMENT ON TABLE notification IS 'System notifications about entity changes for real-time updates';
+COMMENT ON COLUMN notification.channel IS 'Notification channel (typically table name)';
+COMMENT ON COLUMN notification.entity_type IS 'Type of entity (table name)';
+COMMENT ON COLUMN notification.entity IS 'Entity identifier (typically ID or ref)';
+COMMENT ON COLUMN notification.activity IS 'Activity type (e.g., "created", "updated", "completed")';
+COMMENT ON COLUMN notification.state IS 'Processing state of notification';
+COMMENT ON COLUMN notification.content IS 'Optional notification payload data';
+
+-- ============================================================================