On Mon, Oct 29, 2018 at 9:18 AM Uday Bhaskar V <uday.bhaskar579@xxxxxxxxx> wrote: > > Hi, > > I have searched in many postgres blogs for Sequential UUID generation, which can avoid Fragmentation issue. > > I did a POC(in postgres) with sequential UUID against Non sequential which has shown lot of different in space utilization and index size. Sql server has "newsequentialid" which generates sequential UUID. I have created C function which can generate a sequential UUID, but I am not sure how best I can use that in postgres. > > I would really like to contribute to Postgres, If I can. Please let me know your thoughts or plans regarding UUID generation. I think the right approach here is to build a custom extension. There are lots of examples of extensions within contrib and on pgxn. https://pgxn.org/ I guess there might be some utility for this type as UUID fragmetnation is a major problem (it's one of the reasons I discourage the use off UUID type indexes). merlin
