#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();

src/test/java/com/avaje/ebean/dbmigration/ddlgeneration/platform/PlatformDdl_AlterColumnTest.java

@@ -19,7 +19,6 @@ public class PlatformDdl_AlterColumnTest {
   PlatformDdl oraDdl = new Oracle10Platform().getPlatformDdl();
   PlatformDdl sqlServerDdl = new MsSqlServer2005Platform().getPlatformDdl();
 
-
   AlterColumn alterNotNull() {
     AlterColumn alterColumn = new AlterColumn();
     alterColumn.setTableName("mytab");
@@ -57,7 +56,6 @@ public class PlatformDdl_AlterColumnTest {
     alterColumn.setCurrentNotnull(Boolean.TRUE);
     sql = mysqlDdl.alterColumnBaseAttributes(alterColumn);
     assertEquals("alter table mytab modify acol varchar(100) not null", sql);
-
   }
 
   @Test
@@ -93,6 +91,9 @@ public class PlatformDdl_AlterColumnTest {
 
     sql = mysqlDdl.alterColumnNotnull("mytab", "acol", true);
     assertNull(sql);
+
+    sql = sqlServerDdl.alterColumnNotnull("mytab", "acol", true);
+    assertNull(sql);
   }
 
   @Test
@@ -109,6 +110,9 @@ public class PlatformDdl_AlterColumnTest {
 
     sql = mysqlDdl.alterColumnNotnull("mytab", "acol", false);
     assertNull(sql);
+
+    sql = sqlServerDdl.alterColumnNotnull("mytab", "acol", false);
+    assertNull(sql);
   }
 
   @Test
@@ -126,6 +130,8 @@ public class PlatformDdl_AlterColumnTest {
     sql = mysqlDdl.alterColumnDefaultValue("mytab", "acol", "'hi'");
     assertEquals("alter table mytab alter acol set default 'hi'", sql);
 
+    sql = sqlServerDdl.alterColumnDefaultValue("mytab", "acol", "'hi'");
+    assertEquals("alter table mytab add default 'hi' for acol", sql);
   }
 
   @Test
@@ -143,6 +149,8 @@ public class PlatformDdl_AlterColumnTest {
     sql = mysqlDdl.alterColumnDefaultValue("mytab", "acol", "DROP DEFAULT");
     assertEquals("alter table mytab alter acol drop default", sql);
 
+    sql = sqlServerDdl.alterColumnDefaultValue("mytab", "acol", "DROP DEFAULT");
+    assertTrue(sql, sql.startsWith("-- alter"));
   }
 
 }