From a64056156c90980c824e322fe49e2c28d6130286 Mon Sep 17 00:00:00 2001
From: Nathan McKinley <nmckinley@google.com>
Date: Wed, 20 Jun 2018 15:02:25 -0700
Subject: [PATCH] Reject disk shrinkage.

---
 google/resource_sql_database_instance.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/google/resource_sql_database_instance.go b/google/resource_sql_database_instance.go
index f92e3a8c..b892716e 100644
--- a/google/resource_sql_database_instance.go
+++ b/google/resource_sql_database_instance.go
@@ -7,6 +7,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/hashicorp/terraform/helper/customdiff"
 	"github.com/hashicorp/terraform/helper/resource"
 	"github.com/hashicorp/terraform/helper/schema"
 	"github.com/hashicorp/terraform/helper/validation"
@@ -48,6 +49,9 @@ func resourceSqlDatabaseInstance() *schema.Resource {
 			Delete: schema.DefaultTimeout(10 * time.Minute),
 		},
 
+		CustomizeDiff: customdiff.All(
+			customdiff.ForceNewIfChange("settings.0.disk_size", isDiskShrinkage)),
+
 		Schema: map[string]*schema.Schema{
 			"region": &schema.Schema{
 				Type:     schema.TypeString,