How to disable sorting on first column

sivabalan

I am using 1.9.4 I just want to disable sorting on first column. How to do that. I tried lot ways. But didn't work

Here is my code:

var table = $('#table_export').DataTable({
"sPaginationType": "bootstrap",
"bStateSave": true,
"columnDefs": [{ 'bSortable': false, 'targets': [0] }],
"fnStateSave": function (oSettings, oData) {
localStorage.setItem($storageName, JSON.stringify(oData) );
},
"fnStateLoad": function (oSettings) {
return JSON.parse( localStorage.getItem($storageName) );
}
})