pgcrypto.gen_random_uuid() or uuid-ossp.uuid_generate_v4()?

[Thiemo Kellner <thiemo@xxxxxxxxxxxxxxxxxxxx>]

Hi all

I consider using uuid as primary key type. The documentation of  
uuid-ossp states  
(https://www.postgresql.org/docs/10/static/uuid-ossp.html#idm46428633607040)  
makes a note to consider the pgcrypto function instead but not why.  
Can somebody shed some light on that matter?

Kind regards

Thiemo

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