Purpose/Overview:
In order to achieve better performance of RTAC request processing as required in MODRTAC-38, new database view, that was created in scope of MODINVSTOR-518, is going to be utilized. It will help to decrease the number of requests from mod-rtac to mod-inventory-storage which should lead to significant performance improvement. See RTAC performance improvement for more information.
Requirements/Scope:

1. When searching for items associated with particular instance, get the next fields from POST /inventory-hierarchy/items-and-holdings, which takes instance UUID:
   ||Property||Type||Description||
   | id | string | The FOLIO id of the item|
   | location | string | Effective location discovery display name of the item (regular name if discoveryDisplayName is empty)|
   | callNumber| string | The effective call number of the item – prefix + call number + suffix|
   | status | string | The availability status of the item|
   | temporaryLoanType| string | Name of the temporary loan type for a given item |
   | permanentLoanType| string | Name of the default loan type for a given item |
   | volume | string | Volume details for the item (see rules for generating “volume” below)|

2. “volume” should be generated by the next rules
   ||data set ||"volume"|
   |enumeration|(<enumeration>)|
   |enumeration chronology|(<enumeration> <chronology>)|
   |enumeration chronology volume|(<enumeration> <chronology>)|
   |volume|(<volume>)|
   |chronology volume|(<volume>)|
   |chronology|(<chronology>)|

3. dueDate (the date when the holding will be available as per open loan) should still be retrieved from GET /circulation/loans

Acceptance criteria:

• POST /inventory-hierarchy/items-and-holdings is used for items information retrieval

• All fields are added as described above