--no commit message

--no commit message

h2/src/main/org/h2/schema/Constant.java

@@ -27,6 +27,10 @@ public class Constant extends SchemaObject {
         throw Message.getInternalError();
     }
     
+    public String getDropSQL() {
+        return null;
+    }
+
     public String getCreateSQL() {
         StringBuffer buff = new StringBuffer();
         buff.append("CREATE CONSTANT ");

h2/src/main/org/h2/schema/Schema.java

@@ -46,6 +46,10 @@ public class Schema extends DbObject {
         throw Message.getInternalError();
     }
     
+    public String getDropSQL() {
+        return null;
+    }
+
     public String getCreateSQL() {
         if(system) {
             return null;

h2/src/main/org/h2/schema/Sequence.java

@@ -45,6 +45,13 @@ public class Sequence extends SchemaObject {
         this.increment = inc;
     }
     
+    public String getDropSQL() {
+        if(getBelongsToTable()) {
+            return null;
+        }
+        return "DROP SEQUENCE IF EXISTS " + getSQL();
+    }
+    
     public String getCreateSQLForCopy(Table table, String quotedName) {
         throw Message.getInternalError();
     }    

h2/src/main/org/h2/schema/TriggerObject.java

@@ -162,6 +162,10 @@ public class TriggerObject extends SchemaObject {
         return noWait;
     }
     
+    public String getDropSQL() {
+        return null;
+    }
+
     public String getCreateSQLForCopy(Table table, String quotedName) {
         StringBuffer buff = new StringBuffer();
         buff.append("CREATE TRIGGER ");