repost: unique composite index with boolean fields

Hello there,

Could anybody advise me how can I create composite index for table when
one of key fields is of boolean type?

Schema is as follows:

create table test (indoor bool, pos int, name varchar(64) NOT NULL,
check (pos >= 0 and pos <=32000));

create unique index test_pkey on test (indoor, pos);

leads to error
ERROR: Can't find a default operator class for type 16.

Finally, I use char_ops as type class:

create unique index test_pkey on test (indoor char_ops, pos);

-- is it correct?

Sincerely,
D.Marck [DM5020, DM268-RIPE, DM3-RIPN]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck(at)rinet(dot)ru ***
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