Add unique constraint to worldTravelCountries.country_code and create worldTravelCountryRegions table

migrations/0009_zippy_domino.sql

@@ -0,0 +1,11 @@
+CREATE TABLE IF NOT EXISTS "worldTravelCountryRegions" (
+	"id" serial PRIMARY KEY NOT NULL,
+	"name" text NOT NULL,
+	"country_code" text NOT NULL
+);
+--> statement-breakpoint
+DO $$ BEGIN
+ ALTER TABLE "worldTravelCountryRegions" ADD CONSTRAINT "worldTravelCountryRegions_country_code_worldTravelCountries_country_code_fk" FOREIGN KEY ("country_code") REFERENCES "worldTravelCountries"("country_code") ON DELETE no action ON UPDATE no action;
+EXCEPTION
+ WHEN duplicate_object THEN null;
+END $$;