Really? PostgreSQL can use an index created with an older version of ICU? I didn't know that. Edit: The docs say indices need to be rebuilt when ICU version ch

Really? PostgreSQL can use an index created with an older version of ICU? I didn't know that. Edit: The docs say indices need to be rebuilt when ICU version changes: https://www.postgresql.org/docs/11/sql-altercollation.html https://www.postgresql.org/docs/11/sql-altercollation.html ICU offers a way to detect the collation version has changed, but I thought there was no way to access older collation versions.