When the executeSql method of a SQLTransaction is called it will invoke it's callback with a SQLResultSet.
When you call the SQLTransaction executeSql method it's callback methods will be called with a SQLResultSet object. The result object has three properties. The first is the insertId
which will return the row number of a success SQL insert statement. If the SQL statement is not an insert then the insertId
is not set. The rowAffected
is always 0 for a SQL select statement. For insert or update statements it returns the number of rows that have been modified. The final property is of type SQLResultSetList and it contains the data returned from a SQL select statement.
function queryDB(tx) { tx.executeSql('SELECT * FROM DEMO', [], querySuccess, errorCB); } function querySuccess(tx, results) { // this will be empty since no rows were inserted. console.log("Insert ID = " + results.insertId); // this will be 0 since it is a select statement console.log("Rows Affected = " + results.rowAffected); // the number of rows returned by the select statement console.log("Insert ID = " + results.rows.length); } function errorCB(err) { alert("Error processing SQL: "+err.code); } var db = window.openDatabase("Database", "1.0", "PhoneGap Demo", 200000); db.transaction(queryDB, errorCB);
<!DOCTYPE html> <html> <head> <title>Contact Example</title> <script type="text/javascript" charset="utf-8" src="phonegap.js"></script> <script type="text/javascript" charset="utf-8"> // Wait for PhoneGap to load // document.addEventListener("deviceready", onDeviceReady, false); // 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")'); } // Query the database // function queryDB(tx) { tx.executeSql('SELECT * FROM DEMO', [], querySuccess, errorCB); } // Query the success callback // function querySuccess(tx, results) { // this will be empty since no rows were inserted. console.log("Insert ID = " + results.insertId); // this will be 0 since it is a select statement console.log("Rows Affected = " + results.rowAffected); // the number of rows returned by the select statement console.log("Insert ID = " + results.rows.length); } // Transaction error callback // function errorCB(err) { console.log("Error processing SQL: "+err.code); } // Transaction success callback // function successCB() { var db = window.openDatabase("Database", "1.0", "PhoneGap Demo", 200000); db.transaction(queryDB, errorCB); } // PhoneGap is ready // function onDeviceReady() { var db = window.openDatabase("Database", "1.0", "PhoneGap Demo", 200000); db.transaction(populateDB, errorCB, successCB); } </script> </head> <body> <h1>Example</h1> <p>Database</p> </body> </html>