I wrote:
> PG Bug reporting form <noreply(at)postgresql(dot)org> writes:
>> A query using a right bit shift and an equality on a bit field seems to
>> return incorrect results.
> Ugh. bit_cmp expects that any unused bits in the last byte
> are guaranteed zero, but bitshiftright isn't ensuring that.
> Didn't look to see if the same bug exists anywhere else ...
After digging around, it seems that no other bit functions have
this issue. I've pushed a fix --- thanks for the report!
regards, tom lane