CREATE TABLE IF NOT EXISTS "sessions" ( "id" text PRIMARY KEY NOT NULL, "user_id" text NOT NULL, "expires_at" timestamp with time zone NOT NULL ); --> statement-breakpoint CREATE TABLE IF NOT EXISTS "users" ( "id" text PRIMARY KEY NOT NULL, "age" integer, "username" text NOT NULL, "password_hash" text NOT NULL, CONSTRAINT "users_username_unique" UNIQUE("username") ); --> statement-breakpoint DO $$ BEGIN ALTER TABLE "sessions" ADD CONSTRAINT "sessions_user_id_users_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."users"("id") ON DELETE no action ON UPDATE no action; EXCEPTION WHEN duplicate_object THEN null; END $$;