In USMARC there is the subfield 245$b which is Remainder Of Title. In Koha 2.2 this field was linked to the database table and column bibliosubtitle.subtitle. This table does not exist in Koha 3. Being able to see this subfield in search results would be very helpful on some biblio records.
In order to get this subfield on the search results template it must be linked to a database column. In testing it seems that the column does not need to be filled for the proper value to reach the template. This means existing database rows do not need to be updated.
The command line script is included. The question remains whether the updatedatabase.pl block should call the command line script.
Staff Search Results: koha-tmpl/intranet-tmpl/…/modules/catalogue/results.tmpl
Staff Biblio Details: koha-tmpl/intranet-tmpl/…/modules/catalogue/detail.tmpl
OPAC Search Results : koha-tmpl/opac-tmpl/…/modules/opac-results.tmpl
OPAC Biblio Details : koha-tmpl/opac-tmpl/…/modules/opac-detail.tmpl
Modify default framework definition: in installer/data/ mysql and Pg / en and fr-FR /marcflavour/ marc21 and unimarc /mandatory/ marc21_framework_DEFAULT.sql or unimarc_framework_DEFAULT.sql
mysql/en/marcflavour/marc21/mandatory/marc21_framework_DEFAULT.sql
mysql/en/marcflavour/unimarc/mandatory/unimarc_framework_DEFAULT.sql
mysql/fr-FR/marcflavour/marc21/Obligatoire/marc21_framework_DEFAULT.sql
mysql/fr-FR/marcflavour/unimarc/Obligatoire/unimarc_framework_DEFAULT.sql
Pg/en/marcflavour/marc21/mandatory/marc21_framework_DEFAULT.sql
Add to updatedatabase.pl: sql to update marc_subfield_structure to set kohafield to biblio.subtitle
Modify kohastructure.sql: installer/data/ mysql and Pg /kohastructure.sql
Add to updatedatabase.pl: sql to add the column to the biblio table