web-sql

问题 I've been trying to use web sql database api in webkit based browsers. I have been using the async api in the main ui thread and a web worker . Both threads access the same database (which as you know is sqlite underthehood) Everything behaves fine but occassionally transactions are lost or one transaction fails and it seems to be a timing/race condition. It appears access to the underlying sqlite database is not thread-safe. A bit more background. My web worker is simply executing a query

问题 I am working with sencha touch application to handle small database I have used local storage. But, now I want to handle larger amount of database with SQL queries. Can anyone suggest how to use a database system like Websql or any other database system with sencha touch? Any help will be appreciated. 回答1: Try using Ext.data.proxy.Sql Refer these links http://docs.sencha.com/touch/2.1.1/#!/api/Ext.data.proxy.Sql http://senchatouchdev.com/wordpress/2013/04/19/sencha-touch-clarifying-websql

问题 I am working with sencha touch application to handle small database I have used local storage. But, now I want to handle larger amount of database with SQL queries. Can anyone suggest how to use a database system like Websql or any other database system with sencha touch? Any help will be appreciated. 回答1: Try using Ext.data.proxy.Sql Refer these links http://docs.sencha.com/touch/2.1.1/#!/api/Ext.data.proxy.Sql http://senchatouchdev.com/wordpress/2013/04/19/sencha-touch-clarifying-websql

问题 I am writing an app in electron using angular 4. I need a database and want to use websql but I cannot find a way to import websql typings. I added @types/websql. In my IDE, there is no compil error when i do : const db: Database = window.openDatabase('foo', '1.0', 'foo', 2 * 1024 * 1024); but ng serve gives me : Property 'openDatabase' does not exist on type 'Window' I do not have any import specific to @types/websql . As it is not a module, I don't know how to import it. Does anyone have

问题 we are in process of developing google chrome extension, in which we need to store all the video information from a particular website. so we are considering the option of webdb. and now we are getting confused between to use webdb or indexdb.. As of now i think that, indexdb is still experimental, is that correct? and, if we use indexdb, the db even will not show up in dev. tools db section, where as webdb will show up, so that we can do query stuff in there.. please shed some light and put

问题 I'm trying to create a Multi-device hybrid app that uses Typescript, WinJS, and a persistent local database. I've got it working to the point of rendering WinJS controls. However, when I attempt to add WebSQL functionality according to the instructions for adding a Cordova plugin (go to config.xml file--> under plugins tab, check WebSQL Polyfill), it will no longer compile. The compiler error is C:\Program Files (x86)\MSBuild\12.0\bin\amd64\Microsoft.Common.CurrentVersion.targets(1886,5):

问题 I want to return the number of rows in a particular table in a database in WebSQL inside a javascript function. Below is my code. function getCustomerCount(){ var count = 0; db.transaction(function(tx) { tx.executeSql('SELECT * FROM contacts', [], function(tx, results) { count = results.rows.length; }); }); return count; } I am new to WebSQL and rather unfamiliar with javascript also. Any suggestions? 回答1: Another way is to use promises, here is an example with the Jquery deferred object

问题 I want to return the number of rows in a particular table in a database in WebSQL inside a javascript function. Below is my code. function getCustomerCount(){ var count = 0; db.transaction(function(tx) { tx.executeSql('SELECT * FROM contacts', [], function(tx, results) { count = results.rows.length; }); }); return count; } I am new to WebSQL and rather unfamiliar with javascript also. Any suggestions? 回答1: Another way is to use promises, here is an example with the Jquery deferred object

问题 I am calling a function db.transaction with following code: db.transaction(createSheetDB, function(){alert("Sheet creation error!")}, function(){alert("Sheet created!")}); The function createSheetDB is a callback function which is implicitly called by db.transaction() which also passes it a parameter tx. I have implemented function createSheetDB(tx) like this: function createSheetDB(tx) { var nextId = getNextId(); tx.executeSql("INSERT INTO SHEET(id, name, desc) VALUES("+nextId+",'"+sheetName

问题 I'm trying to learn about openDatabase, and I think I'm getting it to INSERT INTO TABLE1, but I can't verify that the SELECT * FROM TABLE1 is working. <html> <head> <script src="http://www.google.com/jsapi"></script> <script type="text/javascript"> google.load("jquery", "1"); </script> <script type="text/javascript"> var db; $(function(){ db = openDatabase('HelloWorld'); db.transaction( function(transaction) { transaction.executeSql( 'CREATE TABLE IF NOT EXISTS Table1 ' + ' (TableID INTEGER