Are they deliberately left disabled after the loading OR is it inadvertent? Hemant K Chitale sent from my smartphone On 16 Feb 2011 07:17, "Clay Colburn" <clay.colburn@xxxxxxxxx> wrote: > I have a database that is a data warehouse, so we bulk load data daily and > tune the database for heavy read operations. I noticed that all of the > foreign keys in the database are disabled. This obviously aids in the speed > of the loading process and the relationships can be verified during the ETL > process. > > My question is, are there any benefits to having these disabled constraints > laying around beyond just having a sort of meta-data description of the > foreign key relationships? Does the optimizer use these at all? > > Thanks!