The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/12/pgtrgm.html Description:
https://www.postgresql.org/docs/12/pgtrgm.html states that "similarity(text, text) real Returns a number that indicates how similar the two arguments are. The range of the result is zero (indicating that the two strings are completely dissimilar) to one (indicating that the two strings are identical)." The word identical is incorrect or at least misleading. It should say "identical under trigram permutation" or the like. Remark that the following two strings are not (strictly) identical, yet their similarity() score is 1: SELECT similarity('aaabaaa', 'aabaaa'); Moreover, a definition of the formula of computation of that function is missing. Sincerely, Paul.
