Описание изменений

backend/db/migrations/003_user_identities.sql

@@ -0,0 +1,28 @@
+CREATE TABLE IF NOT EXISTS user_identities (
+  id SERIAL PRIMARY KEY,
+  user_id INTEGER REFERENCES users(id) ON DELETE CASCADE,
+  provider VARCHAR(50) NOT NULL,
+  provider_id VARCHAR(255) NOT NULL,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  UNIQUE(provider, provider_id)
+);
+
+-- Создаем индексы после создания таблицы
+DO $$ 
+BEGIN 
+  -- Индекс для user_id
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_indexes 
+    WHERE tablename = 'user_identities' AND indexname = 'idx_user_identities_user_id'
+  ) THEN
+    CREATE INDEX idx_user_identities_user_id ON user_identities(user_id);
+  END IF;
+
+  -- Индекс для provider и provider_id
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_indexes 
+    WHERE tablename = 'user_identities' AND indexname = 'idx_user_identities_type_value'
+  ) THEN
+    CREATE INDEX idx_user_identities_type_value ON user_identities(provider, provider_id);
+  END IF;
+END $$;