Improve input data control in test for "dp" parameter
Improve input data control in test for "dp" parameter

CartoDB/CartoDB-SQL-API,calvinmetcalf/CartoDB-SQL-API,calvinmetcalf/CartoDB-SQL-API,calvinmetcalf/CartoDB-SQL-API,calvinmetcalf/CartoDB-SQL-API,dbirchak/CartoDB-SQL-API,CartoDB/CartoDB-SQL-API,dbirchak/CartoDB-SQL-API,dbirchak/CartoDB-SQL-API,dbirchak/CartoDB-SQL-API