[Koha-bugs] [Bug 23982] Count/pagination broken for reports with duplicated column names

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=23982

--- Comment #4 from Jonathan Druart <jonathan.druart at bugs.koha-community.org> ---
Created attachment 95479
  -->
https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=95479&action=edit
Bug 23982: (bug 23624 follow-up) Handle SQL error caused by derived table

Caused by
  commit bca4453c50d8b5b1d3c7029ded2b522a9a2bf868
  Bug 23624: (QA follow-up) Optimize even more

A report like:
SELECT * FROM issues JOIN borrowers USING (borrowernumber)

will have two borrowernumber columns - SQL will give us there rsults,
but if we try to wrap them in a SELECT COUNT(*) FROM (report) it throws
a duplicated column error.

This patch suggests to execute the query the old way if the derived
table optimization failed.

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