Help Required For Approach To Load Data Into Tables

Hi , I am loading the Data into the Tables with the constraints on and redirecting the error rows into a seperate table is there a way to capture the error rows from a execute sql task by directly loading data without constraints and later adding them with the execute sql task and redirecting them to error table as this approach would make the loads quicker. the approach now that i am using is on a row by row basis ..... and if i drop constraints and load data and then add constraints will this deposit the same error rows as in case of the current approach please send me ur suggestions