#374 - ms sql server ... alter column default values

src/main/java/com/avaje/ebean/dbmigration/ddlgeneration/platform/MsSqlServerDdl.java

@@ -14,6 +14,7 @@ public class MsSqlServerDdl extends PlatformDdl {
     this.identitySuffix = " identity(1,1)";
     this.foreignKeyRestrict = "";
     this.inlineUniqueOneToOne = false;
+    this.columnSetDefault = "add default";
   }
 
   @Override
@@ -49,6 +50,17 @@ public class MsSqlServerDdl extends PlatformDdl {
     return sb.toString();
   }
 
+
+  @Override
+  public String alterColumnDefaultValue(String tableName, String columnName, String defaultValue) {
+
+    if (isDropDefault(defaultValue)) {
+      return "-- alter table " + tableName + " drop constraint <unknown>  -- find the appropriate constraint for default value on column " + columnName;
+    } else {
+      return "alter table " + tableName + " add default " + defaultValue + " for " + columnName;
+    }
+  }
+
   public String alterColumnBaseAttributes(AlterColumn alter) {
 
     String tableName = alter.getTableName();