The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/12/collation.html Description:
If exists statistic with nondeteministic collation inherited from column collation then using pattern matching with collation will give an error. There is no information about it. (( I have seen this thread https://www.postgresql.org/message-id/flat/CAAFmbbOvfi%3DwMM%3D3qRsPunBSLb8BFREno2oOzSBS%3DmzfLPKABw%40mail.gmail.com But I can't apply this patch for some reasons. If I knew about the problem I would not use nondeterministic collations and choose another way.
