Re: Levenshtein function cost parameters are in the wrong order

On Mon, Oct 2, 2017 at 5:37 PM, <marco(dot)pennekamp96(at)gmail(dot)com> wrote:

> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/9.6/static/fuzzystrmatch.html
> Description:
>
> The fuzzystrmatch documentation says that the order for the Levenshtein
> cost
> parameters is insertion, deletion, substitution. Based on my tests with
> Postgres 9.4, the order should be deletion, insertion, substitution, since
> the algorithm behaves that way (this can be easily checked).

I did check, and they seem correct to me:

=# select levenshtein('aaa', 'aaab', 1, 100, 100);
levenshtein
-------------
1
(1 row)

Notice that the order of the first two arguments is (source, target).

.m