diff --git a/panoramix/forms.py b/panoramix/forms.py
index d9408f10b..198d77546 100644
--- a/panoramix/forms.py
+++ b/panoramix/forms.py
@@ -277,6 +277,8 @@ class FormFactory(object):
             standalone = HiddenField()
             async = HiddenField()
             json = HiddenField()
+            slice_id = HiddenField()
+            slice_name = HiddenField()
             previous_viz_type = HiddenField(default=viz.viz_type)
 
         filter_cols = datasource.filterable_column_names or ['']
diff --git a/panoramix/models.py b/panoramix/models.py
index 336e55f75..21e0381f5 100644
--- a/panoramix/models.py
+++ b/panoramix/models.py
@@ -80,20 +80,21 @@ class Slice(Model, AuditMixinNullable):
 
     @property
     def datasource_id(self):
-        datasource = self.datasource
-        return datasource.id if datasource else None
+        return self.table_id or self.druid_datasource_id
 
     @property
     def slice_url(self):
         try:
-            d = json.loads(self.params)
+            slice_params = json.loads(self.params)
         except Exception as e:
-            d = {}
+            slice_params = {}
+        slice_params['slice_id'] = self.id
+        slice_params['slice_name'] = self.slice_name
         from werkzeug.urls import Href
         href = Href(
-            "/panoramix/datasource/{self.datasource_type}/"
+            "/panoramix/explore/{self.datasource_type}/"
             "{self.datasource_id}/".format(self=self))
-        return href(d)
+        return href(slice_params)
 
     @property
     def edit_url(self):
@@ -250,7 +251,7 @@ class SqlaTable(Model, Queryable, AuditMixinNullable):
 
     @property
     def table_link(self):
-        url = "/panoramix/datasource/{self.type}/{self.id}/".format(self=self)
+        url = "/panoramix/explore/{self.type}/{self.id}/".format(self=self)
         return '<a href="{url}">{self.table_name}</a>'.format(**locals())
 
     @property
@@ -694,9 +695,7 @@ class Datasource(Model, AuditMixinNullable, Queryable):
 
     @property
     def datasource_link(self):
-        url = (
-            "/panoramix/datasource/"
-            "{self.type}/{self.id}/").format(self=self)
+        url = "/panoramix/explore/{self.type}/{self.id}/".format(self=self)
         return '<a href="{url}">{self.datasource_name}</a>'.format(**locals())
 
     def get_metric_obj(self, metric_name):
diff --git a/panoramix/static/panoramix.js b/panoramix/static/panoramix.js
index 79a989307..69903244f 100644
--- a/panoramix/static/panoramix.js
+++ b/panoramix/static/panoramix.js
@@ -78,14 +78,21 @@ function initializeDatasourceView() {
   }
 
   $("#plus").click(add_filter);
-  $("#save").click(function () {
+  $("#btn_save").click(function () {
     var slice_name = prompt("Name your slice!");
     if (slice_name != "" && slice_name != null) {
       $("#slice_name").val(slice_name);
       $("#action").val("save");
       druidify();
     }
-  })
+  });
+  $("#btn_overwrite").click(function () {
+    var flag = confirm("Overwrite slice [" + $("#slice_name").val() + "] !?");
+    if (flag) {
+      $("#action").val("overwrite");
+      druidify();
+    }
+  });
   add_filter();
   $(".druidify").click(druidify);
 
diff --git a/panoramix/templates/panoramix/datasource.html b/panoramix/templates/panoramix/explore.html
similarity index 92%
rename from panoramix/templates/panoramix/datasource.html
rename to panoramix/templates/panoramix/explore.html
index f94316695..dedad101e 100644
--- a/panoramix/templates/panoramix/datasource.html
+++ b/panoramix/templates/panoramix/explore.html
@@ -77,14 +77,21 @@
           <i class="fa fa-bolt"></i>
           Slice!
         </button>
-        <button type="button" class="btn btn-default" id="save">
-          <i class="fa fa-save"></i>
-          Save as Slice
+        {% if viz.form_data.slice_id %}
+          <button type="button" class="btn btn-default" id="btn_overwrite">
+            <i class="fa fa-save"></i>
+            Overwrite
+          </button>
+        {% endif %}
+        <button type="button" class="btn btn-default" id="btn_save">
+          <i class="fa fa-plus-circle"></i>
+          Save as
         </button>
         <hr style="margin-bottom: 0px;">
         <img src="{{ url_for("static", filename="img/tux_panoramix.png") }}" width=250>
-        <input type="hidden" id="slice_name" name="slice_name" value="TEST">
-        <input type="hidden" id="action" name="action" value="">
+        {{ form.slice_id() }}
+        {{ form.slice_name() }}
+        <input type="hidden" name="action" id="action" value="">
         <input type="hidden" name="datasource_name" value="{{ datasource.name }}">
         <input type="hidden" name="datasource_id" value="{{ datasource.id }}">
         <input type="hidden" name="datasource_type" value="{{ datasource.type }}">
diff --git a/panoramix/templates/panoramix/viz.html b/panoramix/templates/panoramix/viz.html
index e6872894d..61f7bce7e 100644
--- a/panoramix/templates/panoramix/viz.html
+++ b/panoramix/templates/panoramix/viz.html
@@ -6,7 +6,7 @@
   {% if viz.request.args.get("standalone") == "true" %}
     {% extends 'panoramix/viz_standalone.html' %}
   {% else %}
-    {% extends 'panoramix/datasource.html' %}
+    {% extends 'panoramix/explore.html' %}
   {% endif %}
 
 
diff --git a/panoramix/views.py b/panoramix/views.py
index 16cb5b295..ddfa4c881 100644
--- a/panoramix/views.py
+++ b/panoramix/views.py
@@ -274,9 +274,11 @@ def ping():
 
 
 class Panoramix(BaseView):
+
     @has_access
-    @expose("/datasource/<datasource_type>/<datasource_id>/")
-    def datasource(self, datasource_type, datasource_id):
+    @expose("/explore/<datasource_type>/<datasource_id>/")
+    @expose("/datasource/<datasource_type>/<datasource_id>/")  # Legacy url
+    def explore(self, datasource_type, datasource_id):
         if datasource_type == "table":
             datasource = (
                 db.session
@@ -302,7 +304,7 @@ class Panoramix(BaseView):
                     "danger")
                 return redirect('/slicemodelview/list/')
         action = request.args.get('action')
-        if action == 'save':
+        if action in ('save', 'overwrite'):
             session = db.session()
 
             # TODO use form processing form wtforms
@@ -326,19 +328,29 @@ class Panoramix(BaseView):
 
             slice_name = request.args.get('slice_name')
 
-            obj = models.Slice(
-                params=json.dumps(d, indent=4, sort_keys=True),
-                viz_type=request.args.get('viz_type'),
-                datasource_name=request.args.get('datasource_name'),
-                druid_datasource_id=druid_datasource_id,
-                table_id=table_id,
-                datasource_type=datasource_type,
-                slice_name=slice_name,
-            )
-            session.add(obj)
+            if action == "save":
+                slc = models.Slice()
+                msg = "Slice [{}] has been saved".format(slice_name)
+            elif action == "overwrite":
+                slc = (
+                    session.query(models.Slice)
+                    .filter_by(id=request.args.get("slice_id"))
+                    .first()
+                )
+                msg = "Slice [{}] has been overwritten".format(slice_name)
+
+            slc.params = json.dumps(d, indent=4, sort_keys=True)
+            slc.datasource_name = request.args.get('datasource_name')
+            slc.viz_type = request.args.get('viz_type')
+            slc.druid_datasource_id = druid_datasource_id
+            slc.table_id = table_id
+            slc.datasource_type = datasource_type
+            slc.slice_name = slice_name
+
+            session.merge(slc)
             session.commit()
-            flash("Slice <{}> has been added to the pie".format(slice_name), "info")
-            return redirect(obj.slice_url)
+            flash(msg, "info")
+            return redirect(slc.slice_url)
 
 
         if not datasource:
diff --git a/panoramix/viz.py b/panoramix/viz.py
index 78ff03fed..2fd575b3d 100644
--- a/panoramix/viz.py
+++ b/panoramix/viz.py
@@ -93,7 +93,7 @@ class BaseViz(object):
             if d[key] == False:
                 del d[key]
         href = Href(
-            '/panoramix/datasource/{self.datasource.type}/'
+            '/panoramix/explore/{self.datasource.type}/'
             '{self.datasource.id}/'.format(**locals()))
         return href(d)