Database

Contains methods that allow the user to manipulate the Database

Methods

  • transaction: Runs a database transaction.
  • changeVersion: method allows scripts to atomically verify the version number and change it at the same time as doing a schema update.

Details

A Database object is returned from a call to window.openDatabase().

Supported Platforms

  • Android
  • BlackBerry WebWorks (OS 6.0 and higher)
  • iPhone
  • webOS
  • Tizen

Transaction Quick Example

function populateDB(tx) {
	 tx.executeSql('DROP TABLE IF EXISTS DEMO');
	 tx.executeSql('CREATE TABLE IF NOT EXISTS DEMO (id unique, data)');
	 tx.executeSql('INSERT INTO DEMO (id, data) VALUES (1, "First row")');
	 tx.executeSql('INSERT INTO DEMO (id, data) VALUES (2, "Second row")');
}

function errorCB(err) {
	alert("Error processing SQL: "+err.code);
}

function successCB() {
	alert("success!");
}

var db = window.openDatabase("Database", "1.0", "Cordova Demo", 200000);
db.transaction(populateDB, errorCB, successCB);

Change Version Quick Example

var db = window.openDatabase("Database", "1.0", "Cordova Demo", 200000);
db.changeVersion("1.0", "1.1");

Full Example

<!DOCTYPE html>
<html>
  <head>
    <title>Storage Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-2.1.0.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Wait for Cordova to load
    //
    document.addEventListener("deviceready", onDeviceReady, false);

    // Cordova is ready
    //
    function onDeviceReady() {
		var db = window.openDatabase("Database", "1.0", "Cordova Demo", 200000);
		db.transaction(populateDB, errorCB, successCB);
    }
	
	// Populate the database 
	//
	function populateDB(tx) {
		 tx.executeSql('DROP TABLE IF EXISTS DEMO');
		 tx.executeSql('CREATE TABLE IF NOT EXISTS DEMO (id unique, data)');
		 tx.executeSql('INSERT INTO DEMO (id, data) VALUES (1, "First row")');
		 tx.executeSql('INSERT INTO DEMO (id, data) VALUES (2, "Second row")');
	}
	
	// Transaction error callback
	//
	function errorCB(tx, err) {
		alert("Error processing SQL: "+err);
	}
	
	// Transaction success callback
	//
	function successCB() {
		alert("success!");
	}

    </script>
  </head>
  <body>
    <h1>Example</h1>
    <p>Database</p>
  </body>
</html>

Android 1.X Quirks

  • changeVersion: This method is not support by Android 1.X devices.