ADD: stored procedure to move disciplines into new study plans #507

db/postgresql/issue507_multisemester_disciplines.sql

+DROP FUNCTION IF EXISTS public.discipline_move(pstudyplanid integer, pdisciplineid integer, psemesterid integer);
+CREATE OR REPLACE FUNCTION public.plan_binddiscipline(pstudyplanid integer, pdisciplineid integer, psemesterid integer)
+    RETURNS integer
+    LANGUAGE plpgsql
+AS $function$
+BEGIN
+
+    UPDATE disciplines_study_plans set studyplanid = pstudyplanid
+    WHERE disciplines_study_plans.disciplineid = pdisciplineid;
+
+    UPDATE disciplines set semesterid = psemesterid
+    WHERE disciplines.id = pdisciplineid;
+
+    RETURN 0;
+EXCEPTION
+    when others then RETURN -1;
+END
+$function$;
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