HTML5 webSQL查看表结构

var db = openDatabase('mydb14','1.0','Test DB',6 * 1024 * 1024);
db.transaction(function (tx) {
	//开发测试
	var IsDropQLGXRW='select sql from sqlite_master where type="table" and name="QLGXRW"';
	tx.executesql(IsDropQLGXRW,[],function (tx,results) {
		var isdrop=results.rows.item(0).sql;
		var dropflag=isdrop.indexOf("QLGXRWNumber");
		if(dropflag==-1){
			//不包含
			console.log("删除QLGXRW...");
			tx.executesql('DROP TABLE IF EXISTS QLGXRW');
		}
	},null);
	//开发测试
});