i have this code to make a sqlite query:

db.transaction(function (tx))
{
   tx.executeSql("Select * from DatosRemito where idoperador like " + obj.vac_user_id, [], OnSucess, OnError)
});

i have this error Message in my OnError Function when i try to execute my query:

the first line shows me the content in "obj.vac_user_id" variable

what do i am doing bad?