2010/8/11 Boszormenyi Zoltan <zb@cybertec.at>:
> Shouldn't it at least be documented in more depth? Say, get_bit(, N)
> provides the Nth bit (0-based) counting from the leftmost bit?
> I would certainly appreciate a warning spelled out about this
> so if you convert a number to bitstring of length N and you want the
> Mth bit (according to any programming language) then you need to use
> get_bit(..., N-1-M).
The fact that bit-strings subscript from the left rather than from the
right seems pretty odd to me, but it is documented. I wouldn't object
to adding a note to somewhere around here, if we can think of a
suitable way to word it:
http://www.postgresql.org/docs/9.0/static/functions-bitstring.html
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise Postgres Company