Re: UPDATE ... ON CONFLICT DO NOTHING

On 03/14/2017 06:52 AM, Alexander Farber wrote:
> I have come up with the following (when trying to merge array _uids to a
> single out_uid):
>
> -- try to copy as many reviews of this user as possible
> INSERT INTO words_reviews (
> uid,
> author,
> nice,
> review,
> updated
> ) SELECT
> out_uid,
> author,
> nice,
> review,
> updated
> FROM words_reviews
> WHERE uid <> out_uid
> AND uid = ANY(_uids)
> ON CONFLICT DO NOTHING;
>
> DELETE FROM words_reviews
> WHERE uid <> out_uid
> AND uid = ANY(_uids);

Am I missing something, I thought word_reviews was?:

CREATE TABLE words_reviews (
uid integer NOT NULL CHECK (uid <> author) REFERENCES
words_users ON DELETE CASCADE,
author integer NOT NULL REFERENCES words_users(uid) ON DELETE
CASCADE,
nice integer NOT NULL CHECK (nice = 0 OR nice = 1),
review varchar(255),
updated timestamptz NOT NULL,
PRIMARY KEY(uid, author)
);

So where are you getting?:

SELECT
out_uid,
...
FROM words_reviews

>
> -- try to copy as many reviews by this user as possible
> INSERT INTO words_reviews (
> uid,
> author,
> nice,
> review,
> updated
> ) SELECT
> uid,
> out_uid,
> nice,
> review,
> updated
> FROM words_reviews
> WHERE author <> out_uid
> AND author = ANY(_uids)
> ON CONFLICT DO NOTHING;
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com