Extended Search: option to ignore upper and lower case

[m-kotzyba]

It would be helpful to select whether upper and lower case in the filter query strings are considered or not.

[matthias-ronge]

Here we probably have to take into account that this setting has to be made before indexing, and requires re-indexing everything if it is changed. Then this topic is not “easy” to deal with.

My expectation of a search engine is actually that case is not distinguished. Can you give me an example of a use case when distinguishing case in search is needed?

[m-kotzyba]

We have process titles including signatures, such as :

X-G-79-30-Lang-Harzgebirge
KM-Byri-1
Schweiz-Wochenschrift-Pharmacie-10-1872
Schweitzer-Harz-Literatur-1

but also process titles including ATS, such as:

BrauHe_129945684_1965
SchwZefP_166820989

It would ease the daily work and reduce possible errors if we could just search for „schweiz“ or „km-byri“.

[matthias-ronge]

My question was meant the other way round: Do you have a case where you want, that searching for „schweiz“ does not return „Schweiz-Wochenschrift-Pharmacie-10-1872“ and „Schweitzer-Harz-Literatur-1“, but searching for „Schweiz“ does?

What I read from your post, you want case to be ignored, which is what I also think should be the default.

[m-kotzyba]

You are right, I misunderstood the question. Than my Answer is:

No, I can not give you an example where distinguishing the case in search is needed because we always try to make the process titles unique independent of the case.

[matthias-ronge]

Goal: search should be case-insensitive

[thomaslow]

There seems to be no easy way in ElasticSearch to make case-sensitivity optional at query time. They tried to implement this feature, see elastic/elasticsearch#61162, but didn't go through with it. Theoretically, we could index each property (e.g. the process title) both in a lower-case variant and the original cased variant.

Since you agreed that this is not important, I modified the indexing to apply a lower-case filter to a few relevant properties, see pull request #5363.