pg_trgm: unicode string not working - Mailing list pgsql-hackers

I am using pg_trgm for spelling correction as prescribed in the
documentation. But I see that it does not work for unicode sring. The
database was initialized with utf8 encoding and the C locale.

Here is the table:\d words    Table "public.words"Column |  Type   | Modifiers
--------+---------+-----------word   | text    | ndoc   | integer | nentry | integer |
Indexes:   "words_idx" gin (word gin_trgm_ops)

Query: select word from words where word % 'कतद';

I get an error:

ERROR:  GIN indexes do not support whole-index scans


Any idea what is wrong?

-Sushant.