Re: Case Insensitive Search for StringField

[Michael Sokolov]

It's hard to help you because you haven't really explained what the problem
is. You say you must use StringField, which is a non analysed field, but
you also want to lower case the text values in the field, which requires
analysis.

I would suggest that you probably want to use TextField with a lowercase
analyzer, but that is contrary to your stated requirements. It maybe you
can just do the lower casing outside of lucene.

So I guess if you want help you'll need to explain your problem better.

On Fri, May 25, 2018, 6:50 AM Chellasamy G <chellasam...@zohocorp.com>
wrote:

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> Hi Team,
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> Kindly help me out with this problem.
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> Thanks,
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> Satyan
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> ---- On Wed, 23 May 2018 15:01:39 +0530 Chellasamy G &
> lt;chellasam...@zohocorp.com&gt; wrote ----
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> Hi,
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> Thanks for the reply.
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> Actually I need to implement it for StringField which is non-analyzed. So,
> if I am not wrong I can't add the analyzer for StringField.
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> My scenario is something similar to the one discussed in the below thread,
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> https://discuss.elastic.co/t/es-5-0-case-insensitive-search-for-keyword-fields/64111/10
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> Could you please let me know how to do the same the thing in lucene.
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> Thanks,
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> Satyan
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> ---- On Wed, 23 May 2018 12:09:31 +0530 Adrien Grand &
> amp;lt;jpou...@gmail.com&amp;gt; wrote ----
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> Hi Satyan,
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> You need to add a LowercaseTokenFilter to your analysis chain. The way to
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> do it depends on how you are building your analyzer today (pre-built
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> analyzer, extending Analyzer or using CustomAnalyzer). This will preserve
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> the original case in field values because lowercasing will only be applied
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> to the content of the inverted index, not stored fields where hits are
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> Le mer. 23 mai 2018 à 08:36, Chellasamy G &
> amp;lt;chellasam...@zohocorp.com&amp;gt; a
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> écrit :
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> &amp;gt;
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> &amp;gt; Hi,
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> &amp;gt; I can't find any way to perform case insensitive search on
> StringField.
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> &amp;gt; Please help me out.
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> &amp;gt; i.e If the field value is "Flying Robots", then the phrases
> "flying
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> &amp;gt; robots", "fLying RObots" etc should match the value.
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> &amp;gt; I also need the original case of the field value to be preserved
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> &amp;gt; search results.
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> &amp;gt; Thanks,
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> &amp;gt; Satyan
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