How do I get column names of a table?

Hi, I want to get the column names of a table.  This is what I'm doing now:

``` javascript
var selectQuery = 'SELECT * FROM "' + tableName + '" LIMIT 1';
pgClient.query(selectQuery, function(err, result){
    var columns = _.pluck(result.fields, 'name');
})
```

Wondering if there's a better way.  Thanks!
