Re: Trying to fetch records only if preceded by at least another one

Поиск
Список
Период
Сортировка
От Alexander Farber
Тема Re: Trying to fetch records only if preceded by at least another one
Дата
Msg-id CAADeyWge7DBSOvK3JNNbXDLyJfZBAJfYvFnrqYT_bMQV7Kx_Zg@mail.gmail.com
обсуждение исходный текст
Ответ на Re: Trying to fetch records only if preceded by at least another one  (Michael Lewis <mlewis@entrata.com>)
Ответы Re: Trying to fetch records only if preceded by at least another one  (Michael Lewis <mlewis@entrata.com>)
Список pgsql-general
Дерево обсуждения
Thank you Michael -

On Fri, Oct 25, 2019 at 7:28 PM Michael Lewis <mlewis@entrata.com> wrote:
But it prints too many records: all moves cross-multiplied with each other.

As if I have forgotten to add 1 more condition to the JOIN LATERAL

LIMIT 1 inside your lateral should resolve that. Personally, I'd move that condition to EXISTS condition inside WHERE clause instead. Just a style thing as far as I know. 

How would you do that with EXISTS? I tried, but my query failed to compile

Regards
Alex 

В списке pgsql-general по дате отправления:

Предыдущее
От: Michael Lewis
Дата:
Сообщение: Re: Composite type storage overhead
Следующее
От: Michael Lewis
Дата:
Сообщение: Re: Trying to fetch records only if preceded by at least another one