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.