refactor: consolidate uk test case

testdata/diff/create_table/add_uk/diff.sql

@@ -0,0 +1,11 @@
+ALTER TABLE orders
+ADD COLUMN id serial CONSTRAINT orders_id_key UNIQUE;
+
+ALTER TABLE products
+ADD COLUMN id integer GENERATED ALWAYS AS IDENTITY CONSTRAINT products_id_key UNIQUE;
+
+ALTER TABLE user_permissions
+ADD CONSTRAINT user_permissions_user_id_resource_id_permission_type_key UNIQUE (user_id, resource_id, permission_type);
+
+ALTER TABLE users
+ADD COLUMN id integer CONSTRAINT users_id_key UNIQUE;

testdata/diff/create_table/add_uk/new.sql

@@ -0,0 +1,32 @@
+-- Basic single column case
+CREATE TABLE public.users (
+    id integer,
+    username text NOT NULL,
+    email text,
+    CONSTRAINT users_id_key UNIQUE (id)
+);
+
+-- Composite UK case
+CREATE TABLE public.user_permissions (
+    user_id integer NOT NULL,
+    resource_id integer NOT NULL,
+    permission_type text NOT NULL,
+    granted_at timestamp with time zone DEFAULT now(),
+    UNIQUE (user_id, resource_id, permission_type)
+);
+
+-- Identity column case
+CREATE TABLE public.products (
+    id integer GENERATED ALWAYS AS IDENTITY,
+    name text NOT NULL,
+    price numeric(10,2),
+    CONSTRAINT products_id_key UNIQUE (id)
+);
+
+-- Serial column case
+CREATE TABLE public.orders (
+    id serial,
+    customer_id integer NOT NULL,
+    order_date date DEFAULT CURRENT_DATE,
+    CONSTRAINT orders_id_key UNIQUE (id)
+);

testdata/diff/create_table/add_uk/old.sql

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+-- Basic single column case
+CREATE TABLE public.users (
+    username text NOT NULL,
+    email text
+);
+
+-- Composite UK case
+CREATE TABLE public.user_permissions (
+    user_id integer NOT NULL,
+    resource_id integer NOT NULL,
+    permission_type text NOT NULL,
+    granted_at timestamp with time zone DEFAULT now()
+);
+
+-- Identity column case
+CREATE TABLE public.products (
+    name text NOT NULL,
+    price numeric(10,2)
+);
+
+-- Serial column case
+CREATE TABLE public.orders (
+    customer_id integer NOT NULL,
+    order_date date DEFAULT CURRENT_DATE
+);

testdata/diff/create_table/add_uk/plan.json

@@ -0,0 +1,38 @@
+{
+  "version": "1.0.0",
+  "pgschema_version": "1.4.2",
+  "created_at": "1970-01-01T00:00:00Z",
+  "source_fingerprint": {
+    "hash": "a84b1200ad93167b75cad55c9676d78ea09b64430af7d0751b0ace9773199fdb"
+  },
+  "groups": [
+    {
+      "steps": [
+        {
+          "sql": "ALTER TABLE orders\nADD COLUMN id serial CONSTRAINT orders_id_key UNIQUE;",
+          "type": "table.column",
+          "operation": "create",
+          "path": "public.orders.id"
+        },
+        {
+          "sql": "ALTER TABLE products\nADD COLUMN id integer GENERATED ALWAYS AS IDENTITY CONSTRAINT products_id_key UNIQUE;",
+          "type": "table.column",
+          "operation": "create",
+          "path": "public.products.id"
+        },
+        {
+          "sql": "ALTER TABLE user_permissions\nADD CONSTRAINT user_permissions_user_id_resource_id_permission_type_key UNIQUE (user_id, resource_id, permission_type);",
+          "type": "table.constraint",
+          "operation": "create",
+          "path": "public.user_permissions.user_permissions_user_id_resource_id_permission_type_key"
+        },
+        {
+          "sql": "ALTER TABLE users\nADD COLUMN id integer CONSTRAINT users_id_key UNIQUE;",
+          "type": "table.column",
+          "operation": "create",
+          "path": "public.users.id"
+        }
+      ]
+    }
+  ]
+}

testdata/diff/create_table/add_uk/plan.sql

@@ -0,0 +1,11 @@
+ALTER TABLE orders
+ADD COLUMN id serial CONSTRAINT orders_id_key UNIQUE;
+
+ALTER TABLE products
+ADD COLUMN id integer GENERATED ALWAYS AS IDENTITY CONSTRAINT products_id_key UNIQUE;
+
+ALTER TABLE user_permissions
+ADD CONSTRAINT user_permissions_user_id_resource_id_permission_type_key UNIQUE (user_id, resource_id, permission_type);
+
+ALTER TABLE users
+ADD COLUMN id integer CONSTRAINT users_id_key UNIQUE;

testdata/diff/create_table/add_uk/plan.txt

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+Plan: 4 to modify.
+
+Summary by type:
+  tables: 4 to modify
+
+Tables:
+  ~ orders
+    + id (column)
+  ~ products
+    + id (column)
+  ~ user_permissions
+    + user_permissions_user_id_resource_id_permission_type_key (constraint)
+  ~ users
+    + id (column)
+
+DDL to be executed:
+--------------------------------------------------
+
+ALTER TABLE orders
+ADD COLUMN id serial CONSTRAINT orders_id_key UNIQUE;
+
+ALTER TABLE products
+ADD COLUMN id integer GENERATED ALWAYS AS IDENTITY CONSTRAINT products_id_key UNIQUE;
+
+ALTER TABLE user_permissions
+ADD CONSTRAINT user_permissions_user_id_resource_id_permission_type_key UNIQUE (user_id, resource_id, permission_type);
+
+ALTER TABLE users
+ADD COLUMN id integer CONSTRAINT users_id_key UNIQUE;