From 8456ddc69e0c0c2f2917fe224353181d0448536e Mon Sep 17 00:00:00 2001
From: Daniel Quathamer <danielq@memtext.de>
Date: Fri, 12 Nov 2021 09:48:25 +0100
Subject: [PATCH] Performance boost

---
 .../costage_st_studien_aggr_fuellen.sql       | 48 ++++++++++---------
 1 file changed, 25 insertions(+), 23 deletions(-)

diff --git a/src-modules/module/costage/hilfstabellen/costage_st_studien_aggr_fuellen.sql b/src-modules/module/costage/hilfstabellen/costage_st_studien_aggr_fuellen.sql
index 05a561b..669cab5 100644
--- a/src-modules/module/costage/hilfstabellen/costage_st_studien_aggr_fuellen.sql
+++ b/src-modules/module/costage/hilfstabellen/costage_st_studien_aggr_fuellen.sql
@@ -24,6 +24,7 @@ S.second_nationality,
 SG.fachkennzeichen,
 ST.studienform_statistik_code,
 null::integer as st_studiengang_nr_msg,
+null::integer as st_studiengang_nr_msg_primaerflag,
 null::integer as st_studiengang_nr_tsg,
 null::integer as studienfach_sortierung,
 null::char(10) as hrst,
@@ -224,29 +225,30 @@ select st_studium_nr,
        hssem,
        primaerflag,
 --Nun ist studiengang_nr=1 definiert. Die restlichen werden mit RANK ermittelt:
-        -- (case when studiengang_nr is not null then studiengang_nr
-       -- else 
-       -- dense_rank () over (partition by semester, st_studstamm_nr,studiengang_nr  order by 
-        -- (case when studiengangs_typ_kb='TSG' then st_absz_nr else st_studium_nr end ))+1
-        -- end)
- -- as studiengang_nr,
-
- (case when studiengangs_typ_kb ='TSG' then
-  (case when primaerflag =1
-    then 1
-    else
-      (case when st_studiengang_nr_msg in (select distinct T2.st_studiengang_nr_msg from temp_tmp_studien2 T2
-        where  tmp_studien2.matrikelnummer = T2.matrikelnummer and tmp_studien2.semester = T2.Semester)
-        then 1
-        else
-          dense_rank () over (partition by semester, st_studstamm_nr,studiengang_nr  order by(case when studiengangs_typ_kb='TSG' then st_absz_nr  else st_studium_nr end ))+1
-  end )end)
-  else
-    (case when primaerflag =1
-    then 1
-    else
-    dense_rank () over (partition by semester, st_studstamm_nr,studiengang_nr  order by(   case when studiengangs_typ_kb='TSG' then st_absz_nr  else st_studium_nr end  ))+1
-    end) end )   as studiengang_nr2,
+         (case when studiengang_nr =1 then studiengang_nr
+        else 
+        dense_rank () over (partition by semester, st_studstamm_nr,studiengang_nr  order by 
+         (case when studiengangs_typ_kb='TSG' then st_absz_nr else st_studium_nr end ))+1
+         end)
+  as studiengang_nr,
+--AP Code:
+ -- (case when studiengangs_typ_kb ='TSG' then
+  -- (case when primaerflag =1
+    -- then 1
+    -- else
+      -- (case when st_studiengang_nr_msg in (select distinct T2.st_studiengang_nr_msg from temp_tmp_studien2 T2
+        -- where  tmp_studien2.matrikelnummer = T2.matrikelnummer and tmp_studien2.semester = T2.Semester)
+        -- then 1
+        -- else
+          -- dense_rank () over (partition by semester, st_studstamm_nr,studiengang_nr  order by(case when studiengangs_typ_kb='TSG' then st_absz_nr  else st_studium_nr end ))+1
+  -- end )end)
+  -- else
+    -- (case when primaerflag =1
+    -- then 1
+    -- else
+    -- dense_rank () over (partition by semester, st_studstamm_nr,studiengang_nr  order by(   case when studiengangs_typ_kb='TSG' then st_absz_nr  else st_studium_nr end  ))+1
+    -- end) end )   
+    --as studiengang_nr2,
         (case when primaerflag =1 then 1
        else 
        dense_rank () over (partition by semester, st_studstamm_nr,studiengang_nr