[Koha-bugs] [Bug 9588] weighted search query with index

[bugzilla-daemon at bugs.koha-community.org]

http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=9588

--- Comment #3 from Paul Poulain <paul.poulain at biblibre.com> ---
Created attachment 15271
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http://bugs.koha-community.org/bugzilla3/attachment.cgi?id=15271&action=edit
Bug 9588: weighted search query with index

When QueryWeightFields is enabled, the searching query is created with several
options.
In C4::Search::_build_weighted_query, when no index is defined, the query is
build with fuzzy and stemming options. When an index is defined, theses options
are missing, only unconditional right truncation is used.
The consequence is that when QueryStemming is disabled, a search with index can
give more results (due to right truncation) that a search without.

This patch adds stemming and fuzzy on search with index, conditioned with
QueryFuzzy and QuerryStemming sysprefs.
Also changes world list search (wrld) weight to r6 in order to set fuzzy search
to r8 and stemming search to r9 (like search without index).

Test plan :
- Go to searching preferences (admin/preferences.pl?tab=searching)
- Set QueryAutoTruncate to "only if * is added"
- Set QueryFuzzy and QuerryStemming to "Don't try"
- Set QueryWeightFields to "Enable"
- Go to advanced search page
- Select an indexe (ie Title) and perform a search on a short word
=> Look at zebrarv log and see that query does not contain right truncation :
@attr 5=1
- Set QueryFuzzy to "Try"
- Perform same search
=> Look at zebrarv log and see that query contains fuzzy : @attr 5=103
- Set QueryFuzzy to "Don't try" and QuerryStemming to "Try"
- Perform same search
=> Look at zebrarv log and see that query contains rigth truncation on stemmed
word : @attr 5=1

Signed-off-by: koha.aixmarseille <koha.aixmarseille at gmail.com>

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