1 files changed, 44 insertions, 4 deletions

diff --git a/odb/semantics/relational/index.hxx b/odb/semantics/relational/index.hxx
index 621f36a..500c341 100644
--- a/odb/semantics/relational/index.hxx
+++ b/odb/semantics/relational/index.hxx
@@ -31,10 +31,7 @@ namespace semantics
              string const& t = string (),
              string const& m = string (),
              string const& o = string ())
-          : key (id), type_ (t), method_ (m), options_ (o)
-      {
-      }
-
+          : key (id), type_ (t), method_ (m), options_ (o) {}
       index (index const&, uscope&, graph&);
       index (xml::parser&, uscope&, graph&);
 
@@ -50,11 +47,54 @@ namespace semantics
       virtual void
       serialize (xml::serializer&) const;
 
+    protected:
+      void
+      serialize_attributes (xml::serializer&) const;
+
     private:
       string type_;    // E.g., "UNIQUE", etc.
       string method_;  // E.g., "BTREE", etc.
       string options_; // Database-specific index options.
     };
+
+    class add_index: public index
+    {
+    public:
+      add_index (string const& id,
+                 string const& t = string (),
+                 string const& m = string (),
+                 string const& o = string ())
+          : index (id, t, m, o) {}
+      add_index (index const& i, uscope& s, graph& g): index (i, s, g) {}
+      add_index (xml::parser& p, uscope& s, graph& g): index (p, s, g) {}
+
+      virtual add_index&
+      clone (uscope&, graph&) const;
+
+      virtual string
+      kind () const {return "add index";}
+
+      virtual void
+      serialize (xml::serializer&) const;
+    };
+
+    class drop_index: public unameable
+    {
+    public:
+      drop_index (string const& id): unameable (id) {}
+      drop_index (drop_index const& di, uscope&, graph& g)
+          : unameable (di, g) {}
+      drop_index (xml::parser&, uscope&, graph&);
+
+      virtual drop_index&
+      clone (uscope&, graph&) const;
+
+      virtual string
+      kind () const {return "drop index";}
+
+      virtual void
+      serialize (xml::serializer&) const;
+    };
   }
 }