Roy Tate <roy.l.tate@gmail.com> writes:
> I found a minor mistake in the documentation of string functions.
> http://www.postgresql.org/docs/9.4/static/functions-string.html
> In table 9-6 examples and results columns, look at the overlay function,
> which has 4 x characters, but overlays 3 characters. Please remove an x.
Really? The example works as stated for me:
regression=# select overlay('Txxxxas' placing 'hom' from 2 for 4);
overlay
---------
Thomas
(1 row)
Removing an 'x' would give
regression=# select overlay('Txxxas' placing 'hom' from 2 for 4);
overlay
---------
Thoms
(1 row)
I think the example is trying to point out that the replacement string
need not be the same length as what is replaced.
regards, tom lane