> On 24/03/2023 21:45 CET PG Doc comments form <noreply@postgresql.org> wrote:
>
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/15/functions-string.html
> Description:
>
> When n is negative, an error occurs.
>
> Documentation
> split_part ( string text, delimiter text, n integer ) → text
> Splits string at occurrences of delimiter and returns the n'th field
> (counting from one), or when n is negative, returns the |n|'th-from-last
> field.
> split_part('abc~@~def~@~ghi', '~@~', 2) → def
> split_part('abc,def,ghi,jkl', ',', -2) → ghi
>
> Observation
> SELECT split_part('abc,def,ghi,jkl', ',', -1);
> generates
> ERROR: field position must be greater than zero
> SQL state: 22023
Works on 14 and 15. Support for negative indexes was added in 14. What
version do you use?
https://www.postgresql.org/docs/14/release-14.html#id-1.11.6.12.5.8
--
Erik