Creating an index on a timestamp with time zone cast to a date-- possible?

[Wells Oliver <wells.oliver@xxxxxxxxx>]

Seems you can't do this:

create index on someschema.sometable ((modified_at::date));

If modified_at is a timestamp with a time zone:

ERROR:  functions in index _expression_ must be marked IMMUTABLE

But you can if it's a timestamp without a time zone. Anyway, any way of casting that as to use it as an index?

--

Wells Oliver
wells.oliver@xxxxxxxxx