API calls for ScheduleAssignment

Summary:

What are the API calls for the ScheduleAssignment HDL

We are trying to move a current HDL process to API calls but I cannot find the API's for ScheduleAssignment. We use this HDL to assign a schedule name to a new worker. The Schedule values seem to be held in some unusual SQL tables :

SELECT k.schedule_name FROM zmm_sr_schedules_tl k

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

We are on HCM 26A

Code Snippet (add any code snippets that support your topic, if applicable):

METADATA|ScheduleAssignment|SourceSystemOwner|SourceSystemId|ResourceAssignmentId(SourceSystemId)|AssignmentNumber|ScheduleName|StartDate|EndDate|ResourceType|PrimaryFlag