[Koha-bugs] [Bug 33488] New: Branch transfer limits should have an index on fromBranch

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=33488

            Bug ID: 33488
           Summary: Branch transfer limits should have an index on
                    fromBranch
 Change sponsored?: ---
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          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

In a consortium with many libraries, the branch transfer limits can become
complex and have many rows - we have seen 750k+ 

At this size, searching on limits can take 1/2 a second or more - and when a
record has many items this begins to add up fast

Adding an index to the fromBranch column greatly reduces the cost of a lookup:
CREATE INDEX fromBranch_index ON branch_transfer_limits (fromBranch);

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