BUG: Searching returns no results for leading wildcard term

[atarkowska]

This is caused by the FullTextAnalyzer (ticket:1010) not being used for wildcard searches:

• ​http://wiki.apache.org/lucene-java/LuceneFAQ#What_wildcard_search_support_is_available_from_Lucene.3F
• ​http://jira.atlassian.com/browse/JRA-15006
• ​http://stackoverflow.com/questions/2432486/lucene-wildcard-queries
• ​http://markmail.org/message/nfpoofjlyu4fkgcl#query:+page:1+mid:bkbjgtjvp5xz5igo+state:results

There's a proposed workaround in lucene-misc-2.4.1.jar called the AnalyzingQueryParser which does pass the search string to the analyzer, even with wildcards. To use it, however, we may need more investigation. (Especially the JIRA link above illustrates some of the issues one can run into)

Extending Ola's test with the following tests:

        texts = ("*earch", "*h", "search tif", "search",\
                 "test", "tag", "t*", "search_test",\
                 "*test*.tif", "search*tif", "s .tif",\
                 ".tif", "tif", "*tif",\
                 "s*.tif", "*.tif")

I see the following terms fail for the default QueryParser:

• *.tif
• search*tif
• s*.tif
• *test*.tif

For the new AnalyzingQueryParser:

• *earch
• *h
• search*tif
• s*.tif
• *test*.tif

So, we can get "*.tif" back, but at the cost of "*earch" and "*h". With further investigation, we can probably come up with something that makes each of these cases pass, but other searches may then start to fail.

Possibly related is #1011 which would not use an analyzer at all on some fields like Image.name so that the underscores in "search_test_1.tif" don't get removed.

I'll commit the extended test and the lucene-misc jars and we can discuss further.

[atarkowska]

(In [8385]) test, see #3164