Elasticsearch search fails in field with special character and wildcard

See the query_string documentation:

Wildcarded terms are not analyzed by default — they are lowercased (lowercase_expanded_terms defaults to true) but no further analysis is done

your stored data is broken up into two terms:

curl -XGET 'localhost:9200/myindex/_analyze?analyzer=diacritical&pretty' -d 'PEI.H.02354.01'{  "tokens" : [ {    "token" : "pei.h",    "start_offset" : 0,    "end_offset" : 5,    "type" : "<ALPHANUM>",    "position" : 1  }, {    "token" : "02354.01",    "start_offset" : 6,    "end_offset" : 14,    "type" : "<NUM>",    "position" : 2  } ]}

but as your search term with a wildcard is only turned into pei.h.02354.01.* it won't match.

however with analyze_wildcard set to true, you do get hits:

curl -XGET "http://localhost:9200/myindex/testType/_search?pretty" -d'> {>    "query":{>       "query_string":{>          "query":"field:PEI.H.02354.01.*",>          "default_operator":"AND",>          "analyze_wildcard": true>       }>    }> }'{  "took" : 5,  "timed_out" : false,  "_shards" : {    "total" : 5,    "successful" : 5,    "failed" : 0  },  "hits" : {    "total" : 2,    "max_score" : 1.4142135,