[Koha-bugs] [Bug 10185] New: updatedatabase.pl remove all reserves

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

http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=10185

            Bug ID: 10185
           Summary: updatedatabase.pl remove all reserves
    Classification: Unclassified
 Change sponsored?: ---
           Product: Koha
           Version: 3.10
          Hardware: All
                OS: All
            Status: ASSIGNED
          Severity: critical
          Priority: P5 - low
         Component: Database
          Assignee: julian.maurice at biblibre.com
          Reporter: julian.maurice at biblibre.com

Update number 3.09.00.025 can remove all reserves from reserves table when
there is no entries in old_reserves.
This is due to @ai which is set to NULL in
  SET @ai = ( SELECT MAX( reserve_id ) FROM tmp_reserves )
and reserve_id > NULL returns no results in
  INSERT INTO reserves SELECT * FROM tmp_reserves WHERE reserve_id > @ai

This can be fixed easily by using COALESCE
  INSERT INTO reserves SELECT * FROM tmp_reserves WHERE reserve_id >
COALESCE(@ai, 0)

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