Attachment 132096 Details for Bug 29483 – Bug 29483: Further improve performance of script

[patch] Bug 29483: Further improve performance of script

Bug-29483-Further-improve-performance-of-script.patch (text/plain), 5.06 KB, created by Nick Clemens (kidclamp) on 2022-03-23 22:22:12 UTC

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Creator: Nick Clemens (kidclamp)

Created: 2022-03-23 22:22:12 UTC

Size: 5.06 KB

patch

obsolete

>From 245b2e6277faf3560c49f1db676e76e191da735c Mon Sep 17 00:00:00 2001
>From: Nick Clemens <nick@bywatersolutions.com>
>Date: Fri, 19 Nov 2021 16:13:49 +0000
>Subject: [PATCH] Bug 29483: Further improve performance of script
>
>This patch adds a few tests to cover more cases, and to highlight current functionality.
>
>The script only allows renewal if all outstanding holds can be filled by available items.
>This means we can return as soon as we have determined that not all holds can be filled.
>
>I add FIXME and some explanatory comments - I will file a follow-up bug for those, but
>I feel we can accept these improvements to the performance and deal with the issues
>of how it 'should' work versus how it does work on another report.
>
>To test:
>1 - prove -v t/db_dependent/Circulation.t
>
>Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>
>---
> C4/Circulation.pm | 33 +++++++++++++++++++++++++--------
> 1 file changed, 25 insertions(+), 8 deletions(-)
>
>diff --git a/C4/Circulation.pm b/C4/Circulation.pm
>index d363c060cf..0a24f84339 100644
>--- a/C4/Circulation.pm
>+++ b/C4/Circulation.pm
>@@ -2916,6 +2916,8 @@ sub CanBookBeRenewed {
>         }
>     }
> 
>+    # Note: possible_reserves will contain all title level holds on this bib and item level
>+    # holds on the checked out item
>     my ( $resfound, $resrec, $possible_reserves ) = C4::Reserves::CheckReserves($itemnumber);
> 
>     # If next hold is non priority, then check if any hold with priority (non_priority = 0) exists for the same biblionumber.
>@@ -2940,34 +2942,48 @@ sub CanBookBeRenewed {
>         else {
> 
>             # Get all other items that could possibly fill reserves
>+            # FIXME We could join reserves (or more tables) here to eliminate some checks later
>             my $items = Koha::Items->search({
>                 biblionumber => $resrec->{biblionumber},
>                 onloan       => undef,
>                 notforloan   => 0,
>                 -not         => { itemnumber => $itemnumber }
>             });
>+            my $item_count = $items->count();
> 
>             # Get all other reserves that could have been filled by this item
>             my @borrowernumbers = map { $_->{borrowernumber} } @$possible_reserves;
>+            # Note: fetching the patrons in this manner means that a patron with 2 holds will
>+            # not block renewal if one reserve can be satisfied i.e. each patron is checked once
>             my $patrons = Koha::Patrons->search({
>                 borrowernumber => { -in => \@borrowernumbers }
>             });
>+            my $patron_count = $patrons->count();
> 
>-            # If the count of the union of the lists of reservable items for each borrower
>-            # is equal or greater than the number of borrowers, we know that all reserves
>-            # can be filled with available items. We can get the union of the sets simply
>-            # by pushing all the elements onto an array and removing the duplicates.
>-            my @reservable;
>+            return ( 0, "on_reserve" ) if ($patron_count > $item_count);
>+            # We cannot possibly fill all reserves if we don't have enough items
>+
>+            # If we can fill each hold that has been found with the available items on the record
>+            # then the patron can renew. If we cannot, they cannot renew.
>+            # FIXME This code does not check whether the item we are renewing can fill
>+            # any of the existing reserves.
>+            my $reservable = 0;
>             my %matched_items;
>+            my $seen = 0;
>             PATRON: while ( my $patron = $patrons->next ) {
>+                # If there is a reserve that cannot be filled we are done
>+                return ( 0, "on_reserve" ) if ( $seen > $reservable );
>                 my $items_any_available = ItemsAnyAvailableAndNotRestricted( { biblionumber => $item->biblionumber, patron => $patron });
>                 while ( my $other_item = $items->next ) {
>-                    next if $matched_items{$other_item->itemnumber} == 1;
>+                    next if defined $matched_items{$other_item->itemnumber};
>                     next if IsItemOnHoldAndFound( $other_item->itemnumber );
>                     next unless IsAvailableForItemLevelRequest($other_item, $patron, undef, $items_any_available);
>                     next unless CanItemBeReserved($patron,$other_item,undef,{ignore_hold_counts=>1})->{status} eq 'OK';
>-                    push @reservable, $other_item->itemnumber;
>-                    if (@reservable >= @borrowernumbers) {
>+                    # NOTE: At checkin we call 'CheckReserves' which checks hold 'policy'
>+                    # CanItemBeReserved checks 'rules' and 'policies' which means
>+                    # items will fill holds at checkin that are rejected here
>+                    $reservable++;
>+                    if ($reservable >= $patron_count) {
>                         $resfound = 0;
>                         last PATRON;
>                     }
>@@ -2975,6 +2991,7 @@ sub CanBookBeRenewed {
>                     last;
>                 }
>                 $items->reset;
>+                $seen++;
>             }
>         }
>     }
>-- 
>2.30.2

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