The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/12/functions-string.html
Description:
Preparing to upgrade old PostgreSQL and looking changelog, I has found log
about "prefix text match" operator (boosted by SP_GIST):
=> select 'ab' ^@ 'a';
?column?
----------
t
(1 row)
Yes, search on prefix is widely used, indeed. But there is nothing about it
in the documentation. Instead exists only a function "starts_with", may be
this is a different thing. And may be it is not boosted by the index in the
same way, as operator ^@. And functionality is duplicated.
At least this operator must be documented.