Revision 577277a3
Von Kivitendo Admin vor fast 7 Jahren hinzugefügt
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=head1 MOTIVATION AND PROBLEMS |
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The concept of shipped qty is sadly not as straight forward as it sounds on
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The concept of shipped qty is sadly not as straight forward as it sounds at
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first glance. Any correct implementation must in some way deal with the |
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following problems. |
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How to find the correct matching elements. After the changes |
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to record item links it's natural to assume that each position is linked, but |
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for various reasons this might not be the case. Positions that are not linked |
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in database need to be matched by marching. |
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in the database need to be matched by marching.
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=item * |
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=item * |
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Certain delivery orders might not be eligable for qty calculations if delivery
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Certain delivery orders might not be eligible for qty calculations if delivery
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orders are used for other purposes. |
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=item * |
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=item C<delivered> |
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Valid after L</calculate>. Returns a hasref with delivered flag by order id.
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Valid after L</calculate>. Returns a hashref with a delivered flag by order id.
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=back |
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detailed information is needed. |
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This is to be integrated into fast delivered check on the orders. The calling |
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convention for the delivery_order is not scope of this module. |
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convention for the delivery_order is not part of the scope of this module.
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=head2 do_mode |
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Originally used for printing delivery orders. Resolves for each position for |
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much was originally ordered, and how much remains undelivered. |
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how much was originally ordered, and how much remains undelivered.
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This one is likely to be dropped. The information makes only sense without
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This one is likely to be dropped. The information only makes sense without
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combined merge/split deliveries and is very fragile with unaccounted delivery |
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orders. |
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=head2 oe mode |
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Same from order perspective. Used for transitions to delivery orders, where |
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Same from the order perspective. Used for transitions to delivery orders, where
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delivered qtys should be removed from positions. Also used each time a record |
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is rendered to show the shipped qtys. Also used to find orders that are not |
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fully delivered. |
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=head1 COMPLEXITY OBSERVATIONS |
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Perl ops except sort are expected to be constant (relative to the op overhead). |
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Perl ops except for sort are expected to be constant (relative to the op overhead).
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=head2 Record item links |
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The query itself has indices available for all joins and filters and should |
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scale with sublinear with number of affected orderitems. |
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scale with sublinear with the number of affected orderitems.
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The rest of the code iterates through the result and call C<AM::convert_unit>, |
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The rest of the code iterates through the result and calls C<AM::convert_unit>,
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which caches internally and is asymptotically constant. |
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=head2 Fill up |
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elements in the multimap, and does not add additional complexity. |
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The sort and parallel walk are O(nlogn) for the length of the subdivisions, |
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whioch again makes square worst case, but much less than that in the general
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which again makes square worst case, but much less than that in the general |
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case. |
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=head3 Space requirements |
Auch abrufbar als: Unified diff
ShippedQty - fixed some typos in documentation