1. In a computing environment, a method performed at least in part on at least one processor, comprising, simulating query execution to provide incremental visualization for a global data set, including, processing parameter data for controlling incremental visualization of query execution on the global data set, executing operations on at least a portion of the global data set, providing partial results in accordance with the parameter data, and providing statistical information including uncertainty information, corresponding to using the partial results as a credible estimate of full query results on the global data set.