[KinoSearch] Case sensitive and case insensitive on same index

[Nathan Kurz]

On Wed, Aug 6, 2008 at 2:33 AM, Riyaad Miller <riyaad.miller at predix.com> wrote:
> I'm looking to build a search option that allows the user to 'Match case'.
> I'm also trying to avoid building a separate index that preserves case
> sensitivity. Is there a work around for this or am I forced to have
> duplicate indexing (one case sensitive while the others case insensitive)?

I don't think there is any easy to do this.  The way the
inverted-index works is that each 'word' has a distinct entry in the
index that lists the occurrences of that 'word'.  Since you want to
have case-sensitive search, this means the entries for the words have
to be case-sensitive.

To enable case-insensitive search, you'd have to search through lots
of different entries in the index.  There is no way to do this
automatically.  You could, if you chose, create a custom query parser
that would treat all the case combinations as synonyms, expanding each
query into a lengthy Boolean.

It might be simplest just to have parallel indexes.

Nathan Kurz
nate at verse.com

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