[Koha-bugs] [Bug 29134] New: Patron search has poor performance when ExtendedAttributes enabled and many attributes match

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=29134

            Bug ID: 29134
           Summary: Patron search has poor performance when
                    ExtendedAttributes enabled and many attributes match
 Change sponsored?: ---
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: NEW
          Severity: major
          Priority: P5 - low
         Component: Architecture, internals, and plumbing
          Assignee: koha-bugs at lists.koha-community.org
          Reporter: nick at bywatersolutions.com
        QA Contact: testopia at bugs.koha-community.org

When system preference ExtendedPatronAttributes is enabled the patron search
finds all patrons with a matching attribute and builds a where string with all
the borrowernumbers concatted into an 'IN'
            my @matching_borrowernumbers =
Koha::Patrons->filter_by_attribute_value($searchmember)->get_column('borrowernumber');

            for my $borrowernumber ( @matching_borrowernumbers ) {
                push @where_strs_or, "borrowers.borrowernumber = ?";
                push @where_args, $borrowernumber;
            }

When there are too many matches on a system with many patrons/attributes this
generates a very large query which takes a very long time to return

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