Re: Potential to_date(string, string) function malfunction

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Pavel Pleva <pavel(dot)pleva(at)gmail(dot)com>
Cc: pgsql-bugs(at)lists(dot)postgresql(dot)org
Subject: Re: Potential to_date(string, string) function malfunction
Date: 2019-10-08 15:38:44
Message-ID: 22301.1570549124@sss.pgh.pa.us
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Pavel Pleva <pavel(dot)pleva(at)gmail(dot)com> writes:
> I'd like to report you in my opinion weird behaviour of function
> to_date(string, string). According to specs using format 'YYYY-MM-DD' in
> months portion it should tolerate 01-12 and in days portion 01-31. But
> if you try "SELECT to_date('2019-30-50', 'YYYY-MM-DD') instead of
> throwing error it outputs "2021-07-23".

> This is output of 'SELECT version();' on our system: "PostgreSQL 9.4.23
> on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red
> Hat 4.8.5-36), 64-bit"

PG v10 and later throw an error for this.

regards, tom lane

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