readyapi Database connection

in our project, when I add a datasource step and try to add, and choose JDBC as Data Source, and try to add connection I get a pop that says "Connection properties have changed. Do you want to build a query?", I choose Yes to see table like the screenshot below, since I want to select visually database and fields, but it takes very long time like 7 mins to see all databases, is this something expected to take that long, or is there any other solution for that? It is large database, so is there anyway maybe that readyapi does caching?? or any other solutions for large database.