provider/azurerm: Add support for elastic_pool_name to sql_database

Fixes: #12673

Unfortunately, this ElasticPool has to actually be created so we need to
implement the ElasticPool resource

builtin/providers/azurerm/resource_arm_sql_database.go

@@ -158,6 +158,10 @@ func resourceArmSqlDatabaseCreate(d *schema.ResourceData, meta interface{}) erro
 		command.RequestedServiceObjectiveID = azure.String(v.(string))
 	}
 
+	if v, ok := d.GetOk("elastic_pool_name"); ok {
+		command.ElasticPoolName = azure.String(v.(string))
+	}
+
 	if v, ok := d.GetOk("requested_service_objective_name"); ok {
 		command.RequestedServiceObjectiveName = azure.String(v.(string))
 	}
@@ -216,6 +220,7 @@ func resourceArmSqlDatabaseRead(d *schema.ResourceData, meta interface{}) error
 	d.Set("name", resp.Name)
 	d.Set("creation_date", resp.CreationDate)
 	d.Set("default_secondary_location", resp.DefaultSecondaryLocation)
+	d.Set("elastic_pool_name", resp.ElasticPoolName)
 
 	flattenAndSetTags(d, resp.Tags)
 

builtin/providers/azurerm/resource_arm_sql_database_test.go

@@ -65,6 +65,26 @@ func TestAccAzureRMSqlDatabase_basic(t *testing.T) {
 	})
 }
 
+func TestAccAzureRMSqlDatabase_elasticPool(t *testing.T) {
+	ri := acctest.RandInt()
+	config := fmt.Sprintf(testAccAzureRMSqlDatabase_elasticPool, ri, ri, ri)
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testCheckAzureRMSqlDatabaseDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: config,
+				Check: resource.ComposeTestCheckFunc(
+					testCheckAzureRMSqlDatabaseExists("azurerm_sql_database.test"),
+					resource.TestCheckResourceAttr("azurerm_sql_database.test", "elastic_pool_name", "test_ep"),
+				),
+			},
+		},
+	})
+}
+
 func TestAccAzureRMSqlDatabase_withTags(t *testing.T) {
 	ri := acctest.RandInt()
 	preConfig := fmt.Sprintf(testAccAzureRMSqlDatabase_withTags, ri, ri, ri)
@@ -163,6 +183,33 @@ func testCheckAzureRMSqlDatabaseDestroy(s *terraform.State) error {
 	return nil
 }
 
+var testAccAzureRMSqlDatabase_elasticPool = `
+resource "azurerm_resource_group" "test" {
+    name = "acctestRG_%d"
+    location = "West US"
+}
+resource "azurerm_sql_server" "test" {
+    name = "acctestsqlserver%d"
+    resource_group_name = "${azurerm_resource_group.test.name}"
+    location = "West US"
+    version = "12.0"
+    administrator_login = "mradministrator"
+    administrator_login_password = "thisIsDog11"
+}
+
+resource "azurerm_sql_database" "test" {
+    name = "acctestdb%d"
+    resource_group_name = "${azurerm_resource_group.test.name}"
+    server_name = "${azurerm_sql_server.test.name}"
+    location = "West US"
+    edition = "Standard"
+    collation = "SQL_Latin1_General_CP1_CI_AS"
+    max_size_bytes = "1073741824"
+    elastic_pool_name = "test_ep"
+    requested_service_objective_name = "ElasticPool"
+}
+`
+
 var testAccAzureRMSqlDatabase_basic = `
 resource "azurerm_resource_group" "test" {
     name = "acctestRG_%d"