Add referential actions support to postgres parser

packages/dbml-core/__tests__/importer/postgres-importer/input/referential_actions.in.sql

@@ -0,0 +1,42 @@
+CREATE TABLE "orders" (
+  "id" SERIAL PRIMARY KEY,
+  "user_id" int NOT NULL,
+  "created_at" datetime DEFAULT (now())
+);
+
+CREATE TABLE "order_items" (
+  "id" SERIAL PRIMARY KEY,
+  "order_id" int NOT NULL,
+  "product_id" int DEFAULT null,
+  "quantity" int DEFAULT 1
+);
+
+CREATE TABLE "products" (
+  "id" SERIAL PRIMARY KEY,
+  "name" varchar,
+  "price" decimal(10,4),
+  "created_at" datetime DEFAULT (now())
+);
+
+CREATE TABLE "users" (
+  "id" SERIAL PRIMARY KEY,
+  "name" varchar,
+  "email" varchar UNIQUE,
+  "date_of_birth" datetime,
+  "created_at" datetime DEFAULT (now()),
+  "country_code" int NOT NULL
+);
+
+CREATE TABLE "countries" (
+  "code" int PRIMARY KEY,
+  "name" varchar,
+  "continent_name" varchar
+);
+
+ALTER TABLE "orders" ADD FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE RESTRICT;
+
+ALTER TABLE "order_items" ADD FOREIGN KEY ("order_id") REFERENCES "orders" ("id") ON DELETE CASCADE;
+
+ALTER TABLE "order_items" ADD FOREIGN KEY ("product_id") REFERENCES "products" ("id") ON DELETE SET NULL;
+
+ALTER TABLE "users" ADD FOREIGN KEY ("country_code") REFERENCES "countries" ("code") ON DELETE NO ACTION;

packages/dbml-core/__tests__/importer/postgres-importer/output/referential_actions.out.dbml

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+Table "orders" {
+  "id" int [pk, increment]
+  "user_id" int [not null]
+  "created_at" datetime [default: `now()`]
+}
+
+Table "order_items" {
+  "id" int [pk, increment]
+  "order_id" int [not null]
+  "product_id" int [default: null]
+  "quantity" int [default: 1]
+}
+
+Table "products" {
+  "id" int [pk, increment]
+  "name" varchar
+  "price" "decimal(10, 4)"
+  "created_at" datetime [default: `now()`]
+}
+
+Table "users" {
+  "id" int [pk, increment]
+  "name" varchar
+  "email" varchar [unique]
+  "date_of_birth" datetime
+  "created_at" datetime [default: `now()`]
+  "country_code" int [not null]
+}
+
+Table "countries" {
+  "code" int [pk]
+  "name" varchar
+  "continent_name" varchar
+}
+
+Ref:"users"."id" < "orders"."user_id" [delete: restrict]
+
+Ref:"orders"."id" < "order_items"."order_id" [delete: cascade]
+
+Ref:"products"."id" < "order_items"."product_id" [delete: set null]
+
+Ref:"countries"."code" < "users"."country_code" [delete: no action]

packages/dbml-core/__tests__/parser/postgres-parse/input/referential_actions.in.sql

@@ -0,0 +1,42 @@
+CREATE TABLE "orders" (
+  "id" SERIAL PRIMARY KEY,
+  "user_id" int NOT NULL,
+  "created_at" datetime DEFAULT (now())
+);
+
+CREATE TABLE "order_items" (
+  "id" SERIAL PRIMARY KEY,
+  "order_id" int NOT NULL,
+  "product_id" int DEFAULT null,
+  "quantity" int DEFAULT 1
+);
+
+CREATE TABLE "products" (
+  "id" SERIAL PRIMARY KEY,
+  "name" varchar,
+  "price" decimal(10,4),
+  "created_at" datetime DEFAULT (now())
+);
+
+CREATE TABLE "users" (
+  "id" SERIAL PRIMARY KEY,
+  "name" varchar,
+  "email" varchar UNIQUE,
+  "date_of_birth" datetime,
+  "created_at" datetime DEFAULT (now()),
+  "country_code" int NOT NULL
+);
+
+CREATE TABLE "countries" (
+  "code" int PRIMARY KEY,
+  "name" varchar,
+  "continent_name" varchar
+);
+
+ALTER TABLE "orders" ADD FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE RESTRICT;
+
+ALTER TABLE "order_items" ADD FOREIGN KEY ("order_id") REFERENCES "orders" ("id") ON DELETE CASCADE;
+
+ALTER TABLE "order_items" ADD FOREIGN KEY ("product_id") REFERENCES "products" ("id") ON DELETE SET NULL;
+
+ALTER TABLE "users" ADD FOREIGN KEY ("country_code") REFERENCES "countries" ("code") ON DELETE NO ACTION;