Re: Unique UUID value - PostgreSQL 9.2 - Mailing list pgsql-general

SELECT ​'test_'​ || substring(uuid_generate_v4()::text, 1, 1);

Or use a sequence, or just compute "ROW_NUMBER() OVER ()" and tack that on.

David J.

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Well.. I was able to do it by using:

INSERT INTO dm.billables_links (billable_id) VALUES ((SELECT billable_id FROM junk.wm_260_billables2 WHERE info ilike '%Alisha%')),
INSERT INTO dm.billables_links (mobiuser_id) VALUES ((SELECT id FROM public.ja_mobiusers WHERE name_first LIKE 'Alisha%' AND name_last LIKE 'Dson%'))

The problem is that I need to do that at the same time, because of a constraint:

ALTER TABLE dm.billables_links ADD CONSTRAINT cc_one_and_only_one_target CHECK ((("customer_id" IS NOT NULL)::integer + ("role_id" IS NOT NULL)::integer + ("mobiuser_id" IS NOT NULL)::integer) = 1);

I'm having trouble by creating that SQL... can anyone help please?

FYI - It has to be in the same transaction because the mobiuser_id must go to the selected billable_id on the first select.