Friday, February 26, 2021

[389-users] Re: Unindexed search

Substring search indexes are based on trigraphs aka combinations of three letters. So for example, "search" would be broken down to:

"sea"
"ear"
"arc"
"rch"

This is because 1 and 2 letter indexes were considered "too costly" to maintain when these were originally added.

> On 27 Feb 2021, at 08:49, Chase Miller <chasejmiller@gmail.com> wrote:
>
> Why is a one letter wildcard search not hitting the index?...yet if you add two or more letters to the wildcard, the index is used. Yes cn does have 3 indexes on it.
>
> Example
> 26/Feb/2021:16:33:51.189998029 -0600] - NOTICE - ldbm_back_search - Unindexed search: search base="cn=users,o=Xxxxxx,O=Xxxx" scope=1 filter="(cn=a*)" conn=3 op=18
>
> Yet if the filter is ab* it uses the index
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Sincerely,

William Brown

Senior Software Engineer, 389 Directory Server
SUSE Labs, Australia
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