I had a problem when upgrading a database from 8.1.4 to 8.2.1:
Sorry, the error messages are in german.

pg_restore: [archiver (db)] Error while PROCESSING TOC:
pg_restore: [archiver (db)] Error from TOC entry 1531; 1259 3477393 INDEX 
pg_restore: [archiver (db)] could not execute query: FEHLER:  Funktionen im 
Indexausdruck muessen als IMMUTABLE markiert sein
    Command was: CREATE INDEX idx_inspektionen_dat_inspektion ON inspektionen 
USING btree (to_char(dat_inspektion, 'yyyy'::text));
WARNING: errors ignored on restore: 1

to_char(timestamp, 'yyyy') should be constant and marked immutable, or am I 
wrong here? Or is it not marked immutable because of possible changes on 

        Mario Weilguni

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