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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 its 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 rowsAffected
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) { console.log("Returned rows = " + results.rows.length); // this will be true since it was a select statement and so rowsAffected was 0 if (!resultSet.rowsAffected) { console.log('No rows affected!'); return false; } // for an insert statement, this property will return the ID of the last inserted row console.log("Last inserted row ID = " + results.insertId); } function errorCB(err) { alert("Error processing SQL: "+err.code); } var db = window.openDatabase("Database", "1.0", "Cordova Demo", 200000); db.transaction(queryDB, errorCB);
<!DOCTYPE html> <html> <head> <title>Storage Example</title> <script type="text/javascript" charset="utf-8" src="cordova-1.9.0.js"></script> <script type="text/javascript" charset="utf-8"> // Wait for Cordova 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) { console.log("Returned rows = " + results.rows.length); // this will be true since it was a select statement and so rowsAffected was 0 if (!results.rowsAffected) { console.log('No rows affected!'); return false; } // for an insert statement, this property will return the ID of the last inserted row console.log("Last inserted row ID = " + results.insertId); } // 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", "Cordova Demo", 200000); db.transaction(queryDB, errorCB); } // Cordova is ready // function onDeviceReady() { var db = window.openDatabase("Database", "1.0", "Cordova Demo", 200000); db.transaction(populateDB, errorCB, successCB); } </script> </head> <body> <h1>Example</h1> <p>Database</p> </body> </html>