On 10/22/2013 6:07 PM, Caroline Beltran wrote:
John, thank you for taking the time to respond. Performance wise, a 5%
difference is much better than I thought possible.
The only concern in regards to my post would be in regards to accent
character collation, i.e.:
Angel Smith
Ángel Smith
Angel Williams
...
Additionally, accent insensitive searching is also useful because
people may not type in the accented character when searching. Is it
possible to create a user defined function can be created and then
used during index creation? If so, can that index be used to sort
your data display as well as for your SELECT statements?
the built in lower() (or upper() functions work with the database's
defined LC_CTYPE setting, and properly convert upper/lower case.
but, yes, it IS possible to use user defined functions for a functional
index, just not required in this case as the required functionality is
built in.
And, as I said, there is also the contributed "CITEXT" extension,
distributed with the postgres core,
http://www.nytimes.com/interactive/2012/02/12/us/entitlement-map.html?ref=us
which further simplifies this.
--
john r pierce 37N 122W
somewhere on the middle of the left coast
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