Flex Database Select Statement doesnot respond - database

Question

I am trying to retrieve data in flex database (AIR APPLICATION), below is code. everything is working properly except i am not able to retrieve data. ie.,when select statement is executed result handler is not called after execution
package
{
import flash.data.SQLConnection;
import flash.data.SQLMode;
import flash.data.SQLResult;
import flash.data.SQLSchemaResult;
import flash.data.SQLStatement;
import flash.data.SQLTableSchema;
import flash.errors.SQLError;
import flash.events.SQLErrorEvent;
import flash.events.SQLEvent;
import flash.events.TimerEvent;
import flash.filesystem.File;
import flash.utils.Timer;
import mx.core.FlexGlobals;
public class DB
{
public var conn:SQLConnection;
private var myTimer:Timer
private var selectStmt:SQLStatement;
private var insertStmt:SQLStatement;
public function DB()
{
conn = new SQLConnection();
var dbFile:File = File.applicationStorageDirectory.resolvePath("DBSample1.db");
try
{
conn.openAsync(dbFile);
myTimer = new Timer(1000, 1);
myTimer.addEventListener(TimerEvent.TIMER, timerHandler);
myTimer.start();
trace("the database was created successfully");
}
catch (error:SQLError)
{
trace("1 Error message:", error.message);
trace("Details:", error.details);
}
}
private function timerHandler(e:TimerEvent):void{
if(!doesTableExist(conn,"employee")){
createTable();
}
}
public function updateTrack():void{
insertStmt = new SQLStatement();
insertStmt.sqlConnection = conn;
var sql:String =
"INSERT INTO employee (name, tid) " +
"VALUES ('foo',2)";
insertStmt.text = sql;
insertStmt.addEventListener(SQLEvent.RESULT, insertResult);
insertStmt.addEventListener(SQLErrorEvent.ERROR, insertError);
insertStmt.execute();
}
public function getTracklist():void{
trace("excuting select");
selectStmt = new SQLStatement();
selectStmt.sqlConnection = conn;
selectStmt.text = "SELECT * FROM employee";
selectStmt.addEventListener(SQLEvent.RESULT, resultHandlernew);
selectStmt.addEventListener(SQLErrorEvent.ERROR, errorHandler);
selectStmt.execute();
}
private function resultHandlernew(e:SQLResult):void{
var result:SQLResult = selectStmt.getResult();
var numResults = result.data.length;
trace(numResults);
}
private function createTable():void{
var createStmt:SQLStatement = new SQLStatement();
createStmt.sqlConnection = conn;
var sql:String =
"CREATE TABLE IF NOT EXISTS employee (" +
" id INTEGER PRIMARY KEY AUTOINCREMENT, " +
" name TEXT, " +
" tid INTEGER " +
")";
createStmt.text = sql;
createStmt.addEventListener(SQLEvent.RESULT, createResult);
createStmt.addEventListener(SQLErrorEvent.ERROR, createError);
createStmt.execute();
}
function insertResult(event:SQLEvent):void
{
trace("INSERT statement succeeded");
var result:SQLResult = insertStmt.getResult();
var primaryKey:Number = result.lastInsertRowID;
trace("primaryKey:"+primaryKey);
getTracklist();
}
function insertError(event:SQLErrorEvent):void
{
trace("3 Error message:", event.error.message);
trace("Details:", event.error.details);
}
public function doesTableExist(connection:SQLConnection, tableName:String):Boolean
{
var r:Boolean;
try{
connection.loadSchema();
var schema:SQLSchemaResult = connection.getSchemaResult();
for each (var table:SQLTableSchema in schema.tables)
{
if (table.name.toLowerCase() == tableName.toLowerCase())
{
r= true;
}
}
r = false;
}catch(e){
r = false;
}
return r;
}
private function createResult(event:SQLEvent):void
{
trace("Table created");
updateTrack();
}
private function createError(event:SQLErrorEvent):void
{
trace("2 Error message:", event.error.message);
trace("Details:", event.error.details);
}
private function openHandler(event:SQLEvent):void
{
trace("the database opened successfully");
}
private function errorHandler(event:SQLErrorEvent):void
{
trace("3 Error message:", event.error.message);
trace("Details:", event.error.details);
}
}
}