Null Filter
The statement object includes a nullFilter() method for convenience, just so you don't have to type out the whole filter method. The nullFilter() method includes two arguments - column name and nullability (default is true).
Example:
<cfscript>
// get the datasource
ds = request.DataFaucet.getDatasource();
// get a select statement for the product table
stmt = ds.getSelect("*","tblProduct");
// find products with no category id
stmt.filter(column="productCategoryID",comparison="IS NULL");
// or you can use the nullFilter method
stmt.nullFilter("procutCategoryID");
// or get products that have recall dates (not null)
stmt.nullFilter("productRecallDate",false);
// get the query
query = stmt.execute();
</cfscript>