Question on cast string to date - Mailing list pgsql-general

From 正华吕
Subject Question on cast string to date
Date
Msg-id CANerzAcbEw0Uvv9APGK4FORGbeJ0ftwtuG6=kNgA_P0NTxa9ew@mail.gmail.com
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Responses Re: Question on cast string to date
Re: Question on cast string to date
Re: Question on cast string to date
List pgsql-general
Hi,

    I test the following SQL in pg15dev (seems same behavior as the previous version).

    select '2020701'::date;
    date
   ------------
    0202-07-01
   (1 row)

   At the first glance, the result seems quite strange.

   Go through the code, postgres use date_in to do the cast, and firstly use last 2 chars to
   get the day, and the 2 chars to get the month, and all remaining chars as year.

   The question here is: should we throw error for such input? Or what standard postgres is
   using to cast such kind of string?

Thanks.

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