Add area_commitment_parcel table

sql/v01/20.view.sql

@@ -5,6 +5,20 @@ FROM AT_gem g
     JOIN AT_ort o ON o.gkz = g.gkz
     JOIN AT_plz_dest p ON p.okz = o.okz;
 
+CREATE VIEW v_contract AS
+SELECT v.vnr, v.mgnr, v.year_from, v.year_to,
+       GROUP_CONCAT(DISTINCT p.kgnr || '-' || p.gstnr) AS gstnrs,
+       f.area, f.sortid,
+       GROUP_CONCAT(DISTINCT a.attrid) AS attributes,
+       f.cultid,
+       v.comment
+FROM contract v
+    LEFT JOIN area_commitment f ON f.vnr = v.vnr
+    LEFT JOIN area_commitment_parcel p ON p.vnr = f.vnr
+    LEFT JOIN area_commitment_attribute a ON a.vnr = f.vnr
+GROUP BY v.vnr
+ORDER BY v.vnr;
+
 CREATE VIEW v_delivery AS
 SELECT p.year, p.did, p.dpnr,
        d.date, d.time, d.zwstid, d.lnr, d.lsnr,