Quick db abstract for working with cordova / AngularJS

services.js

/* Services */

var myApp = angular.module('myApp.services', []);
myApp.service('DB', function($window) {
    //var query = 'SELECT DISTINCT(prod_category) FROM prod_master';
    var dbConn = $window.sqlitePlugin.openDatabase({
        name: "hd_app.sqlite"
    });
    var chewer = function(tx, res, callback) {

        var resultSet = [];
        for (var i = 0; i < res.rows.length; i++) {
            var objPush = {
                prodcategory: res.rows.item(i).prod_category
            };
            resultSet.push(objPush);
        };
        callback(resultSet);
    };

    return{
        query: function(query, callback){
            dbConn.transaction(function(tx){
                tx.executeSql(query, [], function(tx, res){
                    chewer(tx, res, callback);
                });
            }, function(e) {
                console.log("ERROR: " + e.message);
            });
        }
    }
});