Fix for azurerm_mysql_database resource wants to re-create on every apply

azurerm/resource_arm_mysql_database.go

@@ -34,9 +34,10 @@ func resourceArmMySqlDatabase() *schema.Resource {
 			},
 
 			"charset": {
-				Type:     schema.TypeString,
-				Required: true,
-				ForceNew: true,
+				Type:             schema.TypeString,
+				Required:         true,
+				DiffSuppressFunc: ignoreCaseDiffSuppressFunc,
+				ForceNew:         true,
 			},
 
 			"collation": {

azurerm/resource_arm_mysql_database_test.go

@@ -30,6 +30,48 @@ func TestAccAzureRMMySQLDatabase_basic(t *testing.T) {
 	})
 }
 
+func TestAccAzureRMMySQLDatabase_charsetUppercase(t *testing.T) {
+	resourceName := "azurerm_mysql_database.test"
+	ri := acctest.RandInt()
+	config := testAccAzureRMMySQLDatabase_charsetUppercase(ri, testLocation())
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testCheckAzureRMMySQLDatabaseDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: config,
+				Check: resource.ComposeTestCheckFunc(
+					testCheckAzureRMMySQLDatabaseExists(resourceName),
+					resource.TestCheckResourceAttr(resourceName, "charset", "utf8"),
+				),
+			},
+		},
+	})
+}
+
+func TestAccAzureRMMySQLDatabase_charsetMixedcase(t *testing.T) {
+	resourceName := "azurerm_mysql_database.test"
+	ri := acctest.RandInt()
+	config := testAccAzureRMMySQLDatabase_charsetMixedcase(ri, testLocation())
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testCheckAzureRMMySQLDatabaseDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: config,
+				Check: resource.ComposeTestCheckFunc(
+					testCheckAzureRMMySQLDatabaseExists(resourceName),
+					resource.TestCheckResourceAttr(resourceName, "charset", "utf8"),
+				),
+			},
+		},
+	})
+}
+
 func testCheckAzureRMMySQLDatabaseExists(name string) resource.TestCheckFunc {
 	return func(s *terraform.State) error {
 		// Ensure we have enough information in state to look up in API
@@ -126,3 +168,85 @@ resource "azurerm_mysql_database" "test" {
 }
 `, rInt, location, rInt, rInt)
 }
+
+func testAccAzureRMMySQLDatabase_charsetUppercase(rInt int, location string) string {
+	return fmt.Sprintf(`
+resource "azurerm_resource_group" "test" {
+  name     = "acctestRG-%d"
+  location = "%s"
+}
+
+resource "azurerm_mysql_server" "test" {
+  name                = "acctestpsqlsvr-%d"
+  location            = "${azurerm_resource_group.test.location}"
+  resource_group_name = "${azurerm_resource_group.test.name}"
+
+  sku {
+    name     = "B_Gen4_2"
+    capacity = 2
+    tier     = "Basic"
+    family   = "Gen4"
+  }
+
+  storage_profile {
+    storage_mb = 51200
+    backup_retention_days = 7
+    geo_redundant_backup = "Disabled"
+  }
+
+  administrator_login          = "acctestun"
+  administrator_login_password = "H@Sh1CoR3!"
+  version                      = "5.6"
+  ssl_enforcement              = "Enabled"
+}
+
+resource "azurerm_mysql_database" "test" {
+  name                = "acctestdb_%d"
+  resource_group_name = "${azurerm_resource_group.test.name}"
+  server_name         = "${azurerm_mysql_server.test.name}"
+  charset             = "UTF8"
+  collation           = "utf8_unicode_ci"
+}
+`, rInt, location, rInt, rInt)
+}
+
+func testAccAzureRMMySQLDatabase_charsetMixedcase(rInt int, location string) string {
+	return fmt.Sprintf(`
+resource "azurerm_resource_group" "test" {
+  name     = "acctestRG-%d"
+  location = "%s"
+}
+
+resource "azurerm_mysql_server" "test" {
+  name                = "acctestpsqlsvr-%d"
+  location            = "${azurerm_resource_group.test.location}"
+  resource_group_name = "${azurerm_resource_group.test.name}"
+
+  sku {
+    name     = "B_Gen4_2"
+    capacity = 2
+    tier     = "Basic"
+    family   = "Gen4"
+  }
+
+  storage_profile {
+    storage_mb = 51200
+    backup_retention_days = 7
+    geo_redundant_backup = "Disabled"
+  }
+
+  administrator_login          = "acctestun"
+  administrator_login_password = "H@Sh1CoR3!"
+  version                      = "5.6"
+  ssl_enforcement              = "Enabled"
+}
+
+resource "azurerm_mysql_database" "test" {
+  name                = "acctestdb_%d"
+  resource_group_name = "${azurerm_resource_group.test.name}"
+  server_name         = "${azurerm_mysql_server.test.name}"
+  charset             = "Utf8"
+  collation           = "utf8_unicode_ci"
+}
+`, rInt, location, rInt, rInt)
+}