v3 UUIDs are basically MD5 hashes (v5 is sha1?). So for the same input you'll always get the same hash.
I had assumed the modified time would be the same; if that's not, then I'm not sure and my gut tells me this becomes A Really Hard Problem™. Jim On Tue, Sep 25, 2018 at 1:38 AM digimer <li...@alteeve.ca> wrote: > On 2018-09-25 1:33 a.m., James Keener wrote: > > Do you need a single field for the pk or can you just make it the > > (original_table_pk, modified_time)? Alternatively, you could generate > > a uuid v3 from the (original_table_pk, modified_time) using something > > like uuid_generate_v3(uuid_nil(), original_table_pk || ":" || > > modified_time)? > > I need to preset the modified_time, I can't use now() or else the value > would differ between databases. Also, unless I am missing something, > uuid_generate_v3() would generate a different UUID per trigger of the > procedure, so I'd end up with different history_uuids on each database > that I ran the query against. > > If I am missing something (and entirely possible I am), please hit me > with a clue stick. :) > > digimer > >
