diff --git a/lib/cartodb/backends/dataview.js b/lib/cartodb/backends/dataview.js
index 82b8f438..18ff2fb2 100644
--- a/lib/cartodb/backends/dataview.js
+++ b/lib/cartodb/backends/dataview.js
@@ -49,42 +49,14 @@ DataviewBackend.prototype.getDataview = function (mapConfigProvider, user, param
                 query = bboxFilter.sql(query);
             }
 
-            var sourceId =  dataviewDefinition.source.id; // node.id
-            var layer = _.find(mapConfig.obj().layers, function(l) {
-                return l.options.source && (l.options.source.id === sourceId);
-            });
-            var queryRewriteData = layer && layer.options.query_rewrite_data;
-            if (queryRewriteData && dataviewDefinition.node.type === 'source') {
-                queryRewriteData = _.extend({}, queryRewriteData, {
-                    filters: dataviewDefinition.node.filters,
-                    unfiltered_query: dataviewDefinition.sql.own_filter_on
-                });
-            }
-
-            if (params.bbox) {
-                if ( queryRewriteData ) {
-                    var bbox_filter_definition = {
-                        type: 'bbox',
-                        options: {
-                            column: 'the_geom_webmercator',
-                            srid: 3857
-                        },
-                        params: {
-                            bbox: params.bbox
-                        }
-                    };
-                    queryRewriteData = _.extend(queryRewriteData, { bbox_filter: bbox_filter_definition });
-                }
-            }
+            var queryRewriteData = getQueryRewriteData(mapConfig, dataviewDefinition, params);
 
             var dataviewFactory = DataviewFactoryWithOverviews.getFactory(
                 overviewsQueryRewriter, queryRewriteData, { bbox: params.bbox }
             );
 
-            var overrideParams = getOverrideParams(params, ownFilter);
-
             var dataview = dataviewFactory.getDataview(query, dataviewDefinition);
-            dataview.getResult(pg, overrideParams, this);
+            dataview.getResult(pg, getOverrideParams(params, ownFilter), this);
         },
         function returnCallback(err, result) {
             return callback(err, result);
@@ -92,6 +64,38 @@ DataviewBackend.prototype.getDataview = function (mapConfigProvider, user, param
     );
 };
 
+function getQueryRewriteData(mapConfig, dataviewDefinition, params) {
+    var sourceId = dataviewDefinition.source.id; // node.id
+    var layer = _.find(mapConfig.obj().layers, function(l) {
+        return l.options.source && (l.options.source.id === sourceId);
+    });
+    var queryRewriteData = layer && layer.options.query_rewrite_data;
+    if (queryRewriteData && dataviewDefinition.node.type === 'source') {
+        queryRewriteData = _.extend({}, queryRewriteData, {
+            filters: dataviewDefinition.node.filters,
+            unfiltered_query: dataviewDefinition.sql.own_filter_on
+        });
+    }
+
+    if (params.bbox) {
+        if ( queryRewriteData ) {
+            var bbox_filter_definition = {
+                type: 'bbox',
+                options: {
+                    column: 'the_geom_webmercator',
+                    srid: 3857
+                },
+                params: {
+                    bbox: params.bbox
+                }
+            };
+            queryRewriteData = _.extend(queryRewriteData, { bbox_filter: bbox_filter_definition });
+        }
+    }
+
+    return queryRewriteData;
+}
+
 function getOverrideParams(params, ownFilter) {
     return _.reduce(_.pick(params, 'start', 'end', 'bins'),
         function castNumbers(overrides, val, k) {