On Wed, Nov 12, 2014 at 8:15 AM, Alessandro Bonfanti <bnf....@gmail.com>
wrote:
> Hi, I'm very newbie on ElasticSearch.
> I'm try to indexing a set of biological data. There are some fields like
> 'gene_id' or 'gene_shortname' that should be processed as literal strings.
> When I try to search for 'ZNF6092' in a field filled with
> 'linc-ZNF6092-6', I can't find anything. When I search for 'linc' I find
> correct document elsewhere.
> It seems that this is a problem with ES analyzer, but I tried to set it
> for do not analyze fields, but it seems that nothing changes.
> I try with:
>
> curl -XPOST 'localhost:9200/a3' -d @tracking_map.json
>
> where tracking_map.json is
>
> {
> "mappings": {
> "tracking": {
> "properties": {
> "tracking_id" : {
> "type": "string",
> "index":"not_analyzed"
> },
> "nearest_ref_id" : {
> "type": "string",
> "index":"not_analyzed"
> },
> "gene_id" : {
> "type": "string",
> "index":"not_analyzed"
> },
> "gene_short_name" : {
> "type": "string",
> "index":"not_analyzed"
> }
> }
> }
> }
> }
>
>
>
> And then re-indexing of all documents. I failed, but where?
> Thanks in advance,
>
> Alessandro
>
>
Its an analyzer problem, certainly. You've turned off analyzers with
"index":"not_analazyed". What you probably want is for the gene_short_name
to be analyzed so that dashes are considered "word separators". If you do
that you can find linc-ZNF6092-6 by performing a simple_query_string (or
match) search for <code>ZNF6092</code> or <code>ZNF6092 6</code> or
<code>6</code> or <code>linc</code>. Have a look at
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-pattern-tokenizer.html
and go from there. You may also want to use a lowercase filter so you can
search for <code>znf6092</code> and still find it.
This is a good read on how to change the mapping as well:
http://www.elasticsearch.org/blog/changing-mapping-with-zero-downtime/
even if you don't need all the information in there it is nice to know.
Nik
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