diff --git a/lib/cartodb/models/dataview/base.js b/lib/cartodb/models/dataview/base.js
index cacfaa77..bc7d13bd 100644
--- a/lib/cartodb/models/dataview/base.js
+++ b/lib/cartodb/models/dataview/base.js
@@ -1,60 +1,16 @@
-function BaseDataview() {}
-
-module.exports = BaseDataview;
-
-BaseDataview.prototype.getResult = function(psql, override, callback) {
-    var self = this;
-    this.sql(psql, override, function(err, query) {
-        if (err) {
-            return callback(err);
-        }
-
-        psql.query(query, function(err, result) {
-            if (err) {
-                return callback(err, result);
-            }
-
-            result = self.format(result, override);
-            result.type = self.getType();
-
-            return callback(null, result);
-
-        }, true); // use read-only transaction
-    });
-
-};
-
-BaseDataview.prototype.search = function(psql, userQuery, callback) {
-    return callback(null, this.format({ rows: [] }));
-};
-
-var FLOAT_OIDS = {
+const FLOAT_OIDS = {
     700: true,
     701: true,
     1700: true
 };
 
-var DATE_OIDS = {
+const DATE_OIDS = {
     1082: true,
     1114: true,
     1184: true
 };
 
-var columnTypeQueryTpl = ctx => `SELECT pg_typeof(${ctx.column})::oid FROM (${ctx.query}) _cdb_column_type limit 1`;
-
-BaseDataview.prototype.getColumnType = function (psql, column, query, callback) {
-    var readOnlyTransaction = true;
-
-    var columnTypeQuery = columnTypeQueryTpl({ column, query });
-
-    psql.query(columnTypeQuery, function(err, result) {
-        if (err) {
-            return callback(err);
-        }
-        var pgType = result.rows[0].pg_typeof;
-        callback(null, getPGTypeName(pgType));
-    }, readOnlyTransaction);
-};
+const columnTypeQueryTpl = ctx => `SELECT pg_typeof(${ctx.column})::oid FROM (${ctx.query}) _cdb_column_type limit 1`;
 
 function getPGTypeName (pgType) {
     return {
@@ -62,3 +18,44 @@ function getPGTypeName (pgType) {
         date: DATE_OIDS.hasOwnProperty(pgType)
     };
 }
+
+module.exports = class BaseDataview {
+    getResult (psql, override, callback) {
+        const self = this;
+        this.sql(psql, override, function(err, query) {
+            if (err) {
+                return callback(err);
+            }
+
+            psql.query(query, function(err, result) {
+                if (err) {
+                    return callback(err, result);
+                }
+
+                result = self.format(result, override);
+                result.type = self.getType();
+
+                return callback(null, result);
+
+            }, true); // use read-only transaction
+        });
+    }
+
+    search (psql, userQuery, callback) {
+        return callback(null, this.format({ rows: [] }));
+    };
+
+    getColumnType (psql, column, query, callback) {
+        const readOnlyTransaction = true;
+
+        const columnTypeQuery = columnTypeQueryTpl({ column, query });
+
+        psql.query(columnTypeQuery, function(err, result) {
+            if (err) {
+                return callback(err);
+            }
+            const pgType = result.rows[0].pg_typeof;
+            callback(null, getPGTypeName(pgType));
+        }, readOnlyTransaction);
+    }
+};