Ajax Autocomplete TextBox from PostgreSQL Not getting Data - php

Question

I am trying to us Ajax to call a php script which gets data from my PostgreSQL In php, my code is:
<?php
# Includes
require("database.inc.php");
require("json.inc.php");
# Retrive URL arguments
$table = $_REQUEST['table'];
$fields = isset($_REQUEST['fields']) ? $_REQUEST['fields'] : '*';
$parameters = isset($_REQUEST['parameters']) ? " where " . $_REQUEST['parameters'] : '';
$order = isset($_REQUEST['order']) ? " order by " . $_REQUEST['order'] : '';
$limit = isset($_REQUEST['limit']) ? " limit " . $_REQUEST['limit'] : '';
# Perform the query
$sql = "select " . $fields . " from " . $table . $parameters . $order . $limit;
$db = pgConnection();
$statement=$db->prepare( $sql );
$statement->execute();
# send JSON or JSONP results
sendJSON($statement);
?>
and here is my Ajax:
$.ajax({
url: "ws_geo_attributequery.php",
//table:'address',
//fields:'file_as_na',
type:'GET',
dataType: "jsonp",
data: {
'table:':'address',
'fields':'file_as_na',
id: 1
},
success: function(response){
var data = $(response).map(function(){
return {value: this.file_as_na, id: this.id};
}).get();
$('#name').autocomplete({
source: data,
minLength: 0,
select: function(event,ui){
$('input#id').val(ui.item.id);
}
});
}
});
I am not getting any result from my Db. I am sure the Problem in my ajax request.
I do appreciate any help.