Bug 3521 - Items table in catalogue/detail.pl and cataloguing/additem.pl is sorted...

Bug 3521 - Items table in catalogue/detail.pl and cataloguing/additem.pl is sorted nonsensically

Based on patch submitted by Ian Walls

Items were sorted by branch, then date accessioned, in GetItemsInfo.  While this can be
helpful in some circumstances, more often it is useful for items to be sorted first by
their enumchron (volume/issue, if applicable) then by their copy number.  This patch changes the
sort on GetItemsInfo to branch, enumcrhon, copynumber then date accessioned.

As sorting on copynumber will be incorrect based on standard sorting ( e.g. 1, 10, 2, 20 ),
the copynumber is now padded with leading zeros to correct the sorting ( e.g. 01, 02, 10 20 ).
This function appears to be a standard SQL function and not a mysql-ism. I have verfified
that is available in MySQL, Postgres, and Oracle.

Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Passed t xt

Item sorts appear to be correct to me based on the rubric of branch, enumchron, copynumber, then date accessioned.

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>