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