On Friday, May 24, 2019 at 6:22:53 AM UTC-7, xura wrote:
>
> In fact, query is now like this:
>
> SELECT DISTINCT ON (jj->>'email') jj->>'email', jj->>'name' , count(*)
> over(partition by jj->>'email' )
> from emails
> join lateral jsonb_array_elements(send_to) j(jj) on true
> ORDER BY jj->>'email', id desc
>
>
Here's how you can do it in Sequel:
Sequel.extension :pg_json_ops
jj = Sequel.pg_json_op(:jj)
DB[:emails].
distinct(jj.get_text('email')).
select(jj.get_text('email'), jj.get_text('name')).
select_append{count.function.*.over(:partition=>jj.get_text('email'))}.
join(Sequel.function(:jsonb_array_elements, :send_to).lateral.as(:j,
[:jj]), true).
order(jj.get_text('email'), Sequel[:id].desc)
Here's the resulting SQL:
SELECT DISTINCT ON (("jj" ->> 'email')) ("jj" ->> 'email'), ("jj" ->>
'name'), count(*) OVER (PARTITION BY ("jj" ->> 'email'))
FROM "emails"
INNER JOIN LATERAL jsonb_array_elements("send_to") AS "j"("jj") ON true
ORDER BY ("jj" ->> 'email'), "id" DESC
Thanks,
Jeremy
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