In article <44E4A209.4080106@gmail.com>,
gustavo halperin <ggusti@gmail.com> writes:
> Hello
> I'm interesting in a partial index for a rows that aren't older than
> 6 mounts, something like the sentence below:
> / CREATE INDEX name_for_the_index ON table
> (the_column_of_type_date) WHERE ( the_column_of_type_date >
> (current_date - interval '6 month')::date );/
> But this is not posible, I receive the next error:
> /ERROR: functions in index predicate must be marked IMMUTABLE/
> So, what is the best solution for my problem?
Use a fixed date 6 months ago, and regularly recreate the index.
