Fix Terraform updates for instances with Google ML Integration enabled (#10411) (#17878)

[upstream:2faba8433361d680285cc3282f8ce9a62f883000]

Signed-off-by: Modular Magician <magic-modules@google.com>

Author: modular-magician

.changelog/10411.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+sql: fixed issues with updating the `enable_google_ml_integration` field in `google_sql_database_instance` resource
+```

google/services/sql/resource_sql_database_instance.go

@@ -1938,8 +1938,8 @@ func resourceSqlDatabaseInstanceUpdate(d *schema.ResourceData, meta interface{})
 		instance.InstanceType = d.Get("instance_type").(string)
 	}
 
-	// Database Version is required for enabling Google ML integration.
-	if d.HasChange("settings.0.enable_google_ml_integration") {
+	// Database Version is required for all calls with Google ML integration enabled or it will be rejected by the API.
+	if d.Get("settings.0.enable_google_ml_integration").(bool) {
 		instance.DatabaseVersion = databaseVersion
 	}
 

google/services/sql/resource_sql_database_instance_test.go

@@ -1366,16 +1366,26 @@ func TestAccSqlDatabaseInstance_EnableGoogleMlIntegration(t *testing.T) {
 		CheckDestroy:             testAccSqlDatabaseInstanceDestroyProducer(t),
 		Steps: []resource.TestStep{
 			{
-				Config: testGoogleSqlDatabaseInstance_EnableGoogleMlIntegration(masterID, true, "POSTGRES_14"),
+				Config: testGoogleSqlDatabaseInstance_EnableGoogleMlIntegration(masterID, true, "POSTGRES_14", "db-custom-2-13312"),
 			},
 			{
 				ResourceName:            "google_sql_database_instance.instance",
 				ImportState:             true,
 				ImportStateVerify:       true,
 				ImportStateVerifyIgnore: []string{"deletion_protection", "root_password"},
 			},
+			// Test that updates to other settings work after google-ml-integration is enabled
 			{
-				Config: testGoogleSqlDatabaseInstance_EnableGoogleMlIntegration(masterID, false, "POSTGRES_14"),
+				Config: testGoogleSqlDatabaseInstance_EnableGoogleMlIntegration(masterID, true, "POSTGRES_14", "db-custom-2-10240"),
+			},
+			{
+				ResourceName:            "google_sql_database_instance.instance",
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"deletion_protection", "root_password"},
+			},
+			{
+				Config: testGoogleSqlDatabaseInstance_EnableGoogleMlIntegration(masterID, false, "POSTGRES_14", "db-custom-2-10240"),
 			},
 			{
 				ResourceName:            "google_sql_database_instance.instance",
@@ -3891,7 +3901,7 @@ resource "google_sql_database_instance" "instance" {
 `, masterID, dbVersion, masterID, pointInTimeRecoveryEnabled)
 }
 
-func testGoogleSqlDatabaseInstance_EnableGoogleMlIntegration(masterID int, enableGoogleMlIntegration bool, dbVersion string) string {
+func testGoogleSqlDatabaseInstance_EnableGoogleMlIntegration(masterID int, enableGoogleMlIntegration bool, dbVersion string, tier string) string {
 	return fmt.Sprintf(`
 resource "google_sql_database_instance" "instance" {
   name                = "tf-test-%d"
@@ -3900,11 +3910,11 @@ resource "google_sql_database_instance" "instance" {
   deletion_protection = false
   root_password		  = "rand-pwd-%d"
   settings {
-    tier = "db-custom-2-13312"
+    tier = "%s"
 	enable_google_ml_integration = %t
   }
 }
-`, masterID, dbVersion, masterID, enableGoogleMlIntegration)
+`, masterID, dbVersion, masterID, tier, enableGoogleMlIntegration)
 }
 
 func testGoogleSqlDatabaseInstance_BackupRetention(masterID int) string {