diff --git a/.npmrc b/.npmrc
index 6041b7e8..0453efcd 100644
--- a/.npmrc
+++ b/.npmrc
@@ -1 +1 @@
-@sap:registry=https://npm.sap.com
\ No newline at end of file
+registry=https://registry.npmjs.org
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 46edeebe..36183264 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3,23 +3,71 @@
   "requires": true,
   "lockfileVersion": 1,
   "dependencies": {
-    "@sap/cds": {
-      "version": "3.33.1",
-      "resolved": "https://npm.sap.com/@sap/cds/-/cds-3.33.1.tgz",
-      "integrity": "sha512-mLSvRba0OlG8jdSb14RF9M2Wbfo19yc4XRqIakCuV1Vs5niXqkeE+COiwNG5TewaXhBsKgD0qDAuiFVm/kGotw==",
+    "@dabh/diagnostics": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/@dabh/diagnostics/-/diagnostics-2.0.2.tgz",
+      "integrity": "sha512-+A1YivoVDNNVCdfozHSR8v/jyuuLTMXwjWuxPFlFlUapXoGc+Gj9mDlTDDfrwl7rXCl2tNZ0kE8sIBO6YOn96Q==",
       "requires": {
-        "@sap/cds-compiler": "^1.24.3",
-        "@sap/cds-foss": "^1.1.0",
-        "@sap/cds-messaging": "^1.8.2",
-        "@sap/cds-reflect": "^2.10.2",
-        "@sap/cds-rest": "^1.6.2",
-        "@sap/cds-services": "^1.27.0"
+        "colorspace": "1.1.x",
+        "enabled": "2.0.x",
+        "kuler": "^2.0.0"
+      }
+    },
+    "@sap-cloud-sdk/analytics": {
+      "version": "1.28.1",
+      "resolved": "https://registry.npmjs.org/@sap-cloud-sdk/analytics/-/analytics-1.28.1.tgz",
+      "integrity": "sha512-O696Z25+pneyC0xbU+EgsflqLtUEAWewijquCi7C2lDsx8nOQN9z7E5iRUyfqZrlLk/N3VQKSTmCeWziI4V5Kg==",
+      "requires": {
+        "@sap-cloud-sdk/util": "^1.28.1",
+        "axios": "^0.19.2"
+      }
+    },
+    "@sap-cloud-sdk/core": {
+      "version": "1.28.1",
+      "resolved": "https://registry.npmjs.org/@sap-cloud-sdk/core/-/core-1.28.1.tgz",
+      "integrity": "sha512-AmFXD4z+I4SDlCSKDksJocvEm83327eQbDiFKHM4QBPoqV5o7V3oYcpZma/rOquAko1RidgGvGYKciTzuLE66Q==",
+      "requires": {
+        "@sap-cloud-sdk/analytics": "^1.28.1",
+        "@sap-cloud-sdk/util": "^1.28.1",
+        "@sap/xsenv": "^3.0.0",
+        "axios": "^0.19.2",
+        "bignumber.js": "^9.0.0",
+        "http-proxy-agent": "^4.0.1",
+        "https-proxy-agent": "^5.0.0",
+        "jsonwebtoken": "^8.5.1",
+        "moment": "~2.27.0",
+        "opossum": "^5.0.0",
+        "rambda": "^5.0.0",
+        "uuid": "^8.2.0",
+        "voca": "^1.4.0"
+      }
+    },
+    "@sap-cloud-sdk/util": {
+      "version": "1.28.1",
+      "resolved": "https://registry.npmjs.org/@sap-cloud-sdk/util/-/util-1.28.1.tgz",
+      "integrity": "sha512-FsZ9o3ux2Qb2CC3FrUOE1Xestd2yyWkOb/FlMt4I3riCOeF/FMGYtQfaKf3AvUVGe7UatcAz4ue4mXveHwzHSQ==",
+      "requires": {
+        "chalk": "^4.1.0",
+        "logform": "^2.2.0",
+        "rambda": "~5.13.1",
+        "winston": "^3.3.3"
+      }
+    },
+    "@sap/cds": {
+      "version": "4.1.9",
+      "resolved": "https://registry.npmjs.org/@sap/cds/-/cds-4.1.9.tgz",
+      "integrity": "sha512-ruh86/uhKEPOBj2c35AS2fx6bxeKDxGPp3wb8edQtCKwPO3pbtKblCH85GqTrFc6k7vSilvTjueO1NMNFsvJMg==",
+      "requires": {
+        "@sap/cds-compiler": "^1.39.0",
+        "@sap/cds-foss": "^2",
+        "@sap/cds-reflect": "^2.12.0",
+        "@sap/cds-runtime": "^2.3.0"
       }
     },
     "@sap/cds-compiler": {
-      "version": "1.24.4",
-      "resolved": "https://npm.sap.com/@sap/cds-compiler/-/cds-compiler-1.24.4.tgz",
-      "integrity": "sha512-C5UGvc+8z1DuVCU/YyyuGwLfm2M0Z5SrhBoZ9hgm1G/Ca1UF2gIzgyZLEnihb53qjV+3bINjro+fKa/XnJueXw==",
+      "version": "1.39.0",
+      "resolved": "https://registry.npmjs.org/@sap/cds-compiler/-/cds-compiler-1.39.0.tgz",
+      "integrity": "sha512-cdyqxac6cqOksqDBIOjCibcFhdscpb8CVi3zgcYbtl50hQF10s08Kl/ZvpZcStD6/FmbwdK+3sVXL8MmAx+fyg==",
       "requires": {
         "antlr4": "4.7.1",
         "resolve": "1.8.1",
@@ -27,32 +75,30 @@
       }
     },
     "@sap/cds-foss": {
-      "version": "1.1.0",
-      "resolved": "https://npm.sap.com/@sap/cds-foss/-/cds-foss-1.1.0.tgz",
-      "integrity": "sha512-Bk5iTC9VqaibPHYCcrGcvTGnDqZkrv/EbtYKk0K25ImXbtk3Da07NUIYsCqkTjRCbuYPI4llGh1gUC7c+35DDQ==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/@sap/cds-foss/-/cds-foss-2.0.0.tgz",
+      "integrity": "sha512-ZAsnt27jfz8K1b3LdwD+/AjyadE/MenoXB4jy/TWqdq8TqX75mHCRGCLCzYft3Cevy0hD2U5/qAWrak7VytBDw==",
       "requires": {
-        "fs-extra": "7.0.1",
+        "fs-extra": "9.0.1",
         "generic-pool": "3.7.1",
-        "uuid": "3.3.2",
-        "yaml": "1.5.1"
+        "uuid": "8.2.0",
+        "yaml": "1.10.0"
       },
       "dependencies": {
-        "@babel/runtime": {
-          "version": "7.6.3",
-          "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.6.3.tgz",
-          "integrity": "sha512-kq6anf9JGjW8Nt5rYfEuGRaEAaH1mkv3Bbu6rYvLOpPh/RusSJXuKPEAoZ7L7gybZkchE8+NV5g9vKF4AGAtsA==",
-          "requires": {
-            "regenerator-runtime": "^0.13.2"
-          }
+        "at-least-node": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/at-least-node/-/at-least-node-1.0.0.tgz",
+          "integrity": "sha512-+q/t7Ekv1EDY2l6Gda6LLiX14rU9TV20Wa3ofeQmwPFZbOMo9DXrLbOjFaaclkXKWidIaopwAObQDqwWtGUjqg=="
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         "fs-extra": {
-          "version": "7.0.1",
-          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
-          "integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
+          "version": "9.0.1",
+          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-9.0.1.tgz",
+          "integrity": "sha512-h2iAoN838FqAFJY2/qVpzFXy+EBxfVE220PalAqQLDVsFOHLJrZvut5puAbCdNv6WJk+B8ihI+k0c7JK5erwqQ==",
           "requires": {
-            "graceful-fs": "^4.1.2",
-            "jsonfile": "^4.0.0",
-            "universalify": "^0.1.0"
+            "at-least-node": "^1.0.0",
+            "graceful-fs": "^4.2.0",
+            "jsonfile": "^6.0.1",
+            "universalify": "^1.0.0"
           }
         },
         "generic-pool": {
@@ -61,159 +107,75 @@
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         },
         "graceful-fs": {
-          "version": "4.2.3",
-          "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.3.tgz",
-          "integrity": "sha512-a30VEBm4PEdx1dRB7MFK7BejejvCvBronbLjht+sHuGYj8PHs7M/5Z+rt5lw551vZ7yfTCj4Vuyy3mSJytDWRQ=="
+          "version": "4.2.4",
+          "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.4.tgz",
+          "integrity": "sha512-WjKPNJF79dtJAVniUlGGWHYGz2jWxT6VhN/4m1NdkbZ2nOsEF+cI1Edgql5zCRhs/VsQYRvrXctxktVXZUkixw=="
         },
         "jsonfile": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
-          "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
+          "version": "6.0.1",
+          "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-6.0.1.tgz",
+          "integrity": "sha512-jR2b5v7d2vIOust+w3wtFKZIfpC2pnRmFAhAC/BuweZFQR8qZzxH1OyrQ10HmdVYiXWkYUqPVsz91cG7EL2FBg==",
           "requires": {
-            "graceful-fs": "^4.1.6"
+            "graceful-fs": "^4.1.6",
+            "universalify": "^1.0.0"
           }
         },
-        "regenerator-runtime": {
-          "version": "0.13.3",
-          "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.13.3.tgz",
-          "integrity": "sha512-naKIZz2GQ8JWh///G7L3X6LaQUAMp2lvb1rvwwsURe/VXwD6VMfr+/1NuNw3ag8v2kY1aQ/go5SNn79O9JU7yw=="
-        },
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-          "version": "0.1.2",
-          "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
-          "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg=="
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/universalify/-/universalify-1.0.0.tgz",
+          "integrity": "sha512-rb6X1W158d7pRQBg5gkR8uPaSfiids68LTJQYOtEUhoJUWBdaQHsuT/EUduxXYxcrt4r5PJ4fuHW1MHT6p0qug=="
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         "uuid": {
-          "version": "3.3.2",
-          "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
-          "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA=="
+          "version": "8.2.0",
+          "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.2.0.tgz",
+          "integrity": "sha512-CYpGiFTUrmI6OBMkAdjSDM0k5h8SkkiTP4WAjQgDgNB1S3Ou9VBEvr6q0Kv2H1mMk7IWfxYGpMH5sd5AvcIV2Q=="
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         "yaml": {
-          "version": "1.5.1",
-          "resolved": "https://registry.npmjs.org/yaml/-/yaml-1.5.1.tgz",
-          "integrity": "sha512-btfJvMOgVthGZSgHBMrDkLuQu4YxOycw6kwuC67cUEOKJmmNozjIa02eKvuSq7usqqqpwwCvflGTF6JcDvSudw==",
-          "requires": {
-            "@babel/runtime": "^7.4.4"
-          }
+          "version": "1.10.0",
+          "resolved": "https://registry.npmjs.org/yaml/-/yaml-1.10.0.tgz",
+          "integrity": "sha512-yr2icI4glYaNG+KWONODapy2/jDdMSDnrONSjblABjD9B4Z5LgiircSt8m8sRZFNi08kG9Sm0uSHtEmP3zaEGg=="
         }
       }
     },
-    "@sap/cds-hana": {
-      "version": "1.25.1",
-      "resolved": "https://npm.sap.com/@sap/cds-hana/-/cds-hana-1.25.1.tgz",
-      "integrity": "sha512-/JRwmX17HH8uv8XaCCiDrZQa1E9x3Ye6tz+cj62U+jWNisx80A6HBNfaI1a6Ut6QvBMgmV7zXByQJqKl/ash7w==",
-      "requires": {
-        "@sap/cds-sql": "^1.24.0"
-      }
-    },
-    "@sap/cds-messaging": {
-      "version": "1.8.2",
-      "resolved": "https://npm.sap.com/@sap/cds-messaging/-/cds-messaging-1.8.2.tgz",
-      "integrity": "sha512-V5x8BbKyNVT/g01n6gt19CI0GFseSrpr0N8kHeVzvV6/RZ9XOM/AXscHDQtWreZ9EJwRtIPAG/cB1xJp5neXrg=="
-    },
     "@sap/cds-reflect": {
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-      "resolved": "https://npm.sap.com/@sap/cds-reflect/-/cds-reflect-2.10.2.tgz",
-      "integrity": "sha512-ExFnCep+zoB7gFNw84/hA/H2gnS96mDb1dylcJFeE6/M+BA4Qf2WEnwjEiblaDTS+1Unz4avu0s7+VDmGOwXfA=="
+      "version": "2.13.0",
+      "resolved": "https://registry.npmjs.org/@sap/cds-reflect/-/cds-reflect-2.13.0.tgz",
+      "integrity": "sha512-o51NjqKPqwutkUBvJLQrGrnSQTIlI51OVQC5U8fTfjmf3runDI80b1cF+886t2tHqM1qqxmM5S9n+ZbCcPBZXg=="
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-    "@sap/cds-rest": {
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-      "resolved": "https://npm.sap.com/@sap/cds-rest/-/cds-rest-1.6.2.tgz",
-      "integrity": "sha512-RLOm3YQphk60Nd2GZNsZ4v1PJ+IyAB1l5huklNUBUXzzYcCRqNfdPEnz9CkdyWQcXh63DoIrliPfYu4RU0LeZg==",
+    "@sap/cds-runtime": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/@sap/cds-runtime/-/cds-runtime-2.3.1.tgz",
+      "integrity": "sha512-Ozbjlo94WbKqE8Z4BOPwI+q3NgqImyl1tu1yX0C5L8RWoLesvANmWoH8xvC4s/ZTcNWQjNFYgjA3u/ma0BcJQQ==",
       "requires": {
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-      }
-    },
-    "@sap/cds-services": {
-      "version": "1.27.1",
-      "resolved": "https://npm.sap.com/@sap/cds-services/-/cds-services-1.27.1.tgz",
-      "integrity": "sha512-Z7pwaTYhK0JLirw1GVQSLSTR3npb8SoownFjoI9nVPm80z7MMhn6ds/2BPJPMMh8Li/5unlSzEBMf6326uHiZw==",
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-        "@sap/cds-foss": "^1.1.0",
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-        "@sap/cds-sql": "^1.24.0",
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-        "@sap/odata-server": "^1.5.2"
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-    "@sap/cds-sql": {
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-      "resolved": "https://npm.sap.com/@sap/cds-sql/-/cds-sql-1.24.0.tgz",
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-      "requires": {
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-    },
-    "@sap/cds-sqlite": {
-      "version": "1.24.0",
-      "resolved": "https://npm.sap.com/@sap/cds-sqlite/-/cds-sqlite-1.24.0.tgz",
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-    "@sap/cloud-sdk-analytics": {
-      "version": "1.17.2",
-      "resolved": "https://npm.sap.com/@sap/cloud-sdk-analytics/-/cloud-sdk-analytics-1.17.2.tgz",
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-        "axios": "0.19.0"
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-    "@sap/cloud-sdk-core": {
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-      "resolved": "https://npm.sap.com/@sap/cloud-sdk-core/-/cloud-sdk-core-1.17.2.tgz",
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-        "bignumber.js": "8.1.1",
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-        "https-proxy-agent": "4.0.0",
-        "jsonwebtoken": "8.5.1",
-        "moment": "2.24.0",
-        "opossum": "4.0.0",
-        "rambda": "2.14.5",
-        "uuid": "3.3.2",
-        "voca": "1.4.0"
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-    "@sap/cloud-sdk-util": {
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-        "rambda": "2.14.5",
-        "winston": "^3.2.1"
+        "@sap-cloud-sdk/core": "^1.18.1",
+        "@sap/cds-foss": "^2",
+        "@sap/odata-server": "^1.6.1"
       }
     },
     "@sap/odata-server": {
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-      "resolved": "https://npm.sap.com/@sap/odata-server/-/odata-server-1.6.0.tgz",
-      "integrity": "sha512-/1aWYDGulYyZ763DRmQ+0Z8pIJPCnWpZZkNIEVuy3IGKCyMT5IaqA1t8yqJyB1Hi7Ze4qMamELg5bakT+F7nKg==",
+      "version": "1.8.2",
+      "resolved": "https://registry.npmjs.org/@sap/odata-server/-/odata-server-1.8.2.tgz",
+      "integrity": "sha512-MVGq3Ifw2H0QK0ObOxNZbsV5rtuboQ+bhXO7bT0W0P4R8HxivVA4oaDaMFk6d95EIJ96v4LamkGF989ZVsd+JQ==",
       "requires": {
-        "@sap/odata-commons": "=2.3.2",
+        "@sap/odata-commons": "=2.4.1",
         "xmlbuilder": "=13.0.2"
       },
       "dependencies": {
         "@sap/odata-commons": {
-          "version": "2.3.2",
-          "resolved": "https://npm.sap.com/@sap/odata-commons/-/odata-commons-2.3.2.tgz",
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+          "version": "2.4.1",
+          "resolved": "https://registry.npmjs.org/@sap/odata-commons/-/odata-commons-2.4.1.tgz",
+          "integrity": "sha512-6G8zHwmRvVMFR5q0LRkszdfG0mNwd1s9xIKSQo78H5cJn+cwbKdY1+8UEhjZ0XssaaPRgus5cCLlrHMfkbADXQ==",
           "requires": {
             "big.js": "=5.2.2"
+          },
+          "dependencies": {
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+              "version": "5.2.2",
+              "resolved": "https://registry.npmjs.org/big.js/-/big.js-5.2.2.tgz",
+              "integrity": "sha512-vyL2OymJxmarO8gxMr0mhChsO9QGwhynfuu4+MHTAW6czfq9humCB7rKpUjDd9YUiDPU4mzpyupFSvOClAwbmQ=="
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-        "big.js": {
-          "version": "5.2.2",
-          "resolved": "https://registry.npmjs.org/big.js/-/big.js-5.2.2.tgz",
-          "integrity": "sha512-vyL2OymJxmarO8gxMr0mhChsO9QGwhynfuu4+MHTAW6czfq9humCB7rKpUjDd9YUiDPU4mzpyupFSvOClAwbmQ=="
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         "xmlbuilder": {
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@@ -222,9 +184,9 @@
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+      "dependencies": {
+        "nopt": {
+          "version": "4.0.3",
+          "resolved": "https://registry.npmjs.org/nopt/-/nopt-4.0.3.tgz",
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+          "dev": true,
+          "requires": {
+            "abbrev": "1",
+            "osenv": "^0.1.4"
+          }
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+        "tar": {
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+          "resolved": "https://registry.npmjs.org/tar/-/tar-4.4.13.tgz",
+          "integrity": "sha512-w2VwSrBoHa5BsSyH+KxEqeQBAllHhccyMFVHtGtdMpF4W7IRWfZjFiQceJPChOeTsSDVUpER2T8FA93pr0L+QA==",
+          "dev": true,
+          "requires": {
+            "chownr": "^1.1.1",
+            "fs-minipass": "^1.2.5",
+            "minipass": "^2.8.6",
+            "minizlib": "^1.2.1",
+            "mkdirp": "^0.5.0",
+            "safe-buffer": "^5.1.2",
+            "yallist": "^3.0.3"
+          }
+        }
       }
     },
     "nopt": {
-      "version": "4.0.3",
-      "resolved": "https://registry.npmjs.org/nopt/-/nopt-4.0.3.tgz",
-      "integrity": "sha512-CvaGwVMztSMJLOeXPrez7fyfObdZqNUK1cPAEzLHrTybIua9pMdmmPR5YwtfNftIOMv3DPUhFaxsZMNTQO20Kg==",
+      "version": "3.0.6",
+      "resolved": "https://registry.npmjs.org/nopt/-/nopt-3.0.6.tgz",
+      "integrity": "sha1-xkZdvwirzU2zWTF/eaxopkayj/k=",
       "dev": true,
+      "optional": true,
       "requires": {
-        "abbrev": "1",
-        "osenv": "^0.1.4"
+        "abbrev": "1"
       }
     },
     "npm-bundled": {
@@ -1482,7 +1553,8 @@
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       "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.9.0.tgz",
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-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "object-assign": {
       "version": "4.1.1",
@@ -1508,14 +1580,17 @@
       }
     },
     "one-time": {
-      "version": "0.0.4",
-      "resolved": "https://registry.npmjs.org/one-time/-/one-time-0.0.4.tgz",
-      "integrity": "sha1-+M33eISCb+Tf+T46nMN7HkSAdC4="
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/one-time/-/one-time-1.0.0.tgz",
+      "integrity": "sha512-5DXOiRKwuSEcQ/l0kGCF6Q3jcADFv5tSmRaJck/OqkVFcOzutB134KRSfF0xDrL39MNnqxbHBbUUcjZIhTgb2g==",
+      "requires": {
+        "fn.name": "1.x.x"
+      }
     },
     "opossum": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/opossum/-/opossum-4.0.0.tgz",
-      "integrity": "sha512-T9w/cxhT5Q3WcaU6m3BE9csDzyojC1+NniMqJipTeqiUKU4h3DdZqZubKgekpMD507dXUAzNASwD33VVRtJP4A=="
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/opossum/-/opossum-5.0.1.tgz",
+      "integrity": "sha512-iUDUQmFl3RanaBVLMDTZ6WtXj/Hk84pwJ5JWoJaQd1lXGifdApHhszI3biZvdBDdpTERCmB6x+7+uNvzhzVZIg=="
     },
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@@ -1564,7 +1639,8 @@
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       "resolved": "https://registry.npmjs.org/performance-now/-/performance-now-2.1.0.tgz",
       "integrity": "sha1-Ywn04OX6kT7BxpMHrjZLSzd8nns=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "process-nextick-args": {
       "version": "2.0.1",
@@ -1584,13 +1660,15 @@
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/psl/-/psl-1.8.0.tgz",
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-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "punycode": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
       "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "qs": {
       "version": "6.7.0",
@@ -1598,9 +1676,9 @@
       "integrity": "sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ=="
     },
     "rambda": {
-      "version": "2.14.5",
-      "resolved": "https://registry.npmjs.org/rambda/-/rambda-2.14.5.tgz",
-      "integrity": "sha512-vYoUQ9bmWfKh6UvxIojk5/x91NcarecpiK+bJndyHg6KPzgtuMLmQ05jWMiRDLDblps1znByuhc6DbGtEuOqZw=="
+      "version": "5.13.1",
+      "resolved": "https://registry.npmjs.org/rambda/-/rambda-5.13.1.tgz",
+      "integrity": "sha512-ygj/oPmskiJXcTMWPo1RkKnqI2EjwvO/0KV/F+oJ5njhj4vDENLPqBV3CjDMiJ8yZTZvQbPOciUnsmXZkAF3Vw=="
     },
     "range-parser": {
       "version": "1.2.1",
@@ -1645,6 +1723,7 @@
       "resolved": "https://registry.npmjs.org/request/-/request-2.88.2.tgz",
       "integrity": "sha512-MsvtOrfG9ZcrOwAW+Qi+F6HbD0CWXEh9ou77uOb7FM2WPhwT7smM833PzanhJLsgXjN89Ir6V2PczXNnMpwKhw==",
       "dev": true,
+      "optional": true,
       "requires": {
         "aws-sign2": "~0.7.0",
         "aws4": "^1.8.0",
@@ -1672,7 +1751,15 @@
           "version": "6.5.2",
           "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.2.tgz",
           "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA==",
-          "dev": true
+          "dev": true,
+          "optional": true
+        },
+        "uuid": {
+          "version": "3.4.0",
+          "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+          "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -1694,9 +1781,9 @@
       }
     },
     "safe-buffer": {
-      "version": "5.2.0",
-      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.0.tgz",
-      "integrity": "sha512-fZEwUGbVl7kouZs1jCdMLdt95hdIv0ZeHg6L7qPeciMZhZ+/gdesW4wgTARkrFWEpspjEATAzUGPG8N2jJiwbg=="
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ=="
     },
     "safer-buffer": {
       "version": "2.1.2",
@@ -1792,14 +1879,14 @@
       }
     },
     "sqlite3": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/sqlite3/-/sqlite3-4.1.1.tgz",
-      "integrity": "sha512-CvT5XY+MWnn0HkbwVKJAyWEMfzpAPwnTiB3TobA5Mri44SrTovmmh499NPQP+gatkeOipqPlBLel7rn4E/PCQg==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/sqlite3/-/sqlite3-5.0.0.tgz",
+      "integrity": "sha512-rjvqHFUaSGnzxDy2AHCwhHy6Zp6MNJzCPGYju4kD8yi6bze4d1/zMTg6C7JI49b7/EM7jKMTvyfN/4ylBKdwfw==",
       "dev": true,
       "requires": {
-        "nan": "^2.12.1",
-        "node-pre-gyp": "^0.11.0",
-        "request": "^2.87.0"
+        "node-addon-api": "2.0.0",
+        "node-gyp": "3.x",
+        "node-pre-gyp": "^0.11.0"
       }
     },
     "sshpk": {
@@ -1807,6 +1894,7 @@
       "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.1.tgz",
       "integrity": "sha512-HXXqVUq7+pcKeLqqZj6mHFUMvXtOJt1uoUx09pFW6011inTMxqI8BA8PM95myrIyyKwdnzjdFjLiE6KBPVtJIg==",
       "dev": true,
+      "optional": true,
       "requires": {
         "asn1": "~0.2.3",
         "assert-plus": "^1.0.0",
@@ -1864,26 +1952,23 @@
       "dev": true
     },
     "supports-color": {
-      "version": "5.5.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-      "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
       "requires": {
-        "has-flag": "^3.0.0"
+        "has-flag": "^4.0.0"
       }
     },
     "tar": {
-      "version": "4.4.13",
-      "resolved": "https://registry.npmjs.org/tar/-/tar-4.4.13.tgz",
-      "integrity": "sha512-w2VwSrBoHa5BsSyH+KxEqeQBAllHhccyMFVHtGtdMpF4W7IRWfZjFiQceJPChOeTsSDVUpER2T8FA93pr0L+QA==",
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/tar/-/tar-2.2.2.tgz",
+      "integrity": "sha512-FCEhQ/4rE1zYv9rYXJw/msRqsnmlje5jHP6huWeBZ704jUTy02c5AZyWujpMR1ax6mVw9NyJMfuK2CMDWVIfgA==",
       "dev": true,
+      "optional": true,
       "requires": {
-        "chownr": "^1.1.1",
-        "fs-minipass": "^1.2.5",
-        "minipass": "^2.8.6",
-        "minizlib": "^1.2.1",
-        "mkdirp": "^0.5.0",
-        "safe-buffer": "^5.1.2",
-        "yallist": "^3.0.3"
+        "block-stream": "*",
+        "fstream": "^1.0.12",
+        "inherits": "2"
       }
     },
     "text-hex": {
@@ -1901,6 +1986,7 @@
       "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.5.0.tgz",
       "integrity": "sha512-nlLsUzgm1kfLXSXfRZMc1KLAugd4hqJHDTvc2hDIwS3mZAfMEuMbc03SujMF+GEcpaX/qboeycw6iO8JwVv2+g==",
       "dev": true,
+      "optional": true,
       "requires": {
         "psl": "^1.1.28",
         "punycode": "^2.1.1"
@@ -1916,6 +2002,7 @@
       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
       "integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
       "dev": true,
+      "optional": true,
       "requires": {
         "safe-buffer": "^5.0.1"
       }
@@ -1924,7 +2011,8 @@
       "version": "0.14.5",
       "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
       "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "type-is": {
       "version": "1.6.18",
@@ -1941,10 +2029,11 @@
       "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
     },
     "uri-js": {
-      "version": "4.2.2",
-      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
-      "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
+      "version": "4.4.0",
+      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.0.tgz",
+      "integrity": "sha512-B0yRTzYdUCCn9n+F4+Gh4yIDtMQcaJsmYBDsTSG8g/OejKBodLQ2IHfN3bM7jUsRXndopT7OIXWdYqc1fjmV6g==",
       "dev": true,
+      "optional": true,
       "requires": {
         "punycode": "^2.1.0"
       }
@@ -1960,9 +2049,9 @@
       "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
     },
     "uuid": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
-      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA=="
+      "version": "8.3.0",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.0.tgz",
+      "integrity": "sha512-fX6Z5o4m6XsXBdli9g7DtWgAx+osMsRRZFKma1mIUsLCz6vRvv+pz5VNbyu9UEDzpMWulZfvpgb/cmDXVulYFQ=="
     },
     "vary": {
       "version": "1.1.2",
@@ -1974,6 +2063,7 @@
       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
       "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
       "dev": true,
+      "optional": true,
       "requires": {
         "assert-plus": "^1.0.0",
         "core-util-is": "1.0.2",
@@ -1985,6 +2075,16 @@
       "resolved": "https://registry.npmjs.org/voca/-/voca-1.4.0.tgz",
       "integrity": "sha512-8Xz4H3vhYRGbFupLtl6dHwMx0ojUcjt0HYkqZ9oBCfipd/5mD7Md58m2/dq7uPuZU/0T3Gb1m66KS9jn+I+14Q=="
     },
+    "which": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "isexe": "^2.0.0"
+      }
+    },
     "wide-align": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
@@ -1995,27 +2095,27 @@
       }
     },
     "winston": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/winston/-/winston-3.2.1.tgz",
-      "integrity": "sha512-zU6vgnS9dAWCEKg/QYigd6cgMVVNwyTzKs81XZtTFuRwJOcDdBg7AU0mXVyNbs7O5RH2zdv+BdNZUlx7mXPuOw==",
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/winston/-/winston-3.3.3.tgz",
+      "integrity": "sha512-oEXTISQnC8VlSAKf1KYSSd7J6IWuRPQqDdo8eoRNaYKLvwSb5+79Z3Yi1lrl6KDpU6/VWaxpakDAtb1oQ4n9aw==",
       "requires": {
-        "async": "^2.6.1",
-        "diagnostics": "^1.1.1",
-        "is-stream": "^1.1.0",
-        "logform": "^2.1.1",
-        "one-time": "0.0.4",
-        "readable-stream": "^3.1.1",
+        "@dabh/diagnostics": "^2.0.2",
+        "async": "^3.1.0",
+        "is-stream": "^2.0.0",
+        "logform": "^2.2.0",
+        "one-time": "^1.0.0",
+        "readable-stream": "^3.4.0",
         "stack-trace": "0.0.x",
         "triple-beam": "^1.3.0",
-        "winston-transport": "^4.3.0"
+        "winston-transport": "^4.4.0"
       }
     },
     "winston-transport": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/winston-transport/-/winston-transport-4.3.0.tgz",
-      "integrity": "sha512-B2wPuwUi3vhzn/51Uukcao4dIduEiPOcOt9HJ3QeaXgkJ5Z7UwpBzxS4ZGNHtrxrUvTwemsQiSys0ihOf8Mp1A==",
+      "version": "4.4.0",
+      "resolved": "https://registry.npmjs.org/winston-transport/-/winston-transport-4.4.0.tgz",
+      "integrity": "sha512-Lc7/p3GtqtqPBYYtS6KCN3c77/2QCev51DvcJKbkFPQNoj1sinkGwLGFDxkXY9J6p9+EPnYs+D90uwbnaiURTw==",
       "requires": {
-        "readable-stream": "^2.3.6",
+        "readable-stream": "^2.3.7",
         "triple-beam": "^1.2.0"
       },
       "dependencies": {
diff --git a/package.json b/package.json
index b8837abc..9d738857 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "bookshop": "cds watch packages/bookshop"
   },
   "dependencies": {
-    "@sap/cds": "^3",
+    "@sap/cds": "^4",
     "express": "^4"
   },
   "devDependencies": {
diff --git a/packages/bookshop/app/package.json b/packages/bookshop/app/package.json
index 57368a68..2a23d1f6 100644
--- a/packages/bookshop/app/package.json
+++ b/packages/bookshop/app/package.json
@@ -3,9 +3,9 @@
   "version": "0.0.1",
   "description": "",
   "dependencies": {
-    "@sap/approuter": "^6"
+    "@sap/approuter": "^8"
   },
   "scripts": {
     "start": "node node_modules/@sap/approuter/approuter.js"
   }
-}
\ No newline at end of file
+}
diff --git a/packages/bookshop/package.json b/packages/bookshop/package.json
index 526c02a5..8a063a5f 100644
--- a/packages/bookshop/package.json
+++ b/packages/bookshop/package.json
@@ -4,10 +4,10 @@
     "description": "A simple bookshop application, build in a self-contained all-in-one fashion, i.e. w/o reusing other packages.",
     "license": "SAP SAMPLE CODE LICENSE",
     "dependencies": {
-       "@sap/cds": "^3",
-       "express": "^4",
-       "passport": "^0.4.1",
-       "hdb": "^0.17.1"
+        "@sap/cds": "^4",
+        "express": "^4",
+        "hdb": "^0.18.1",
+        "passport": "^0.4.1"
     },
     "scripts": {
         "start": "cds run --in-memory?",
diff --git a/packages/bookshop/srv/cat-service.js b/packages/bookshop/srv/cat-service.js
index bdf91080..aa97af72 100644
--- a/packages/bookshop/srv/cat-service.js
+++ b/packages/bookshop/srv/cat-service.js
@@ -14,16 +14,20 @@ function _addDiscount2 (each,discount) {
 
 /** Reduce stock of ordered books if available stock suffices */
 async function _reduceStock (req) {
-  const { Items: OrderItems } = req.data
-  return cds.transaction(req) .run (()=> OrderItems.map (order =>
-    UPDATE (Books) .set ('stock -=', order.amount)
-    .where ('ID =', order.book_ID) .and ('stock >=', order.amount)
-  )) .then (all => all.forEach ((affectedRows,i) => {
-    if (affectedRows === 0)  req.error (409,
-      `${OrderItems[i].amount} exceeds stock for book #${OrderItems[i].book_ID}`
-    )
-  }))
+  const { Items: orderItems } = req.data
+  if (!Array.isArray(orderItems))  return
+
+  const all = await cds.transaction(req).run(orderItems.map(item =>
+    UPDATE(Books)
+      .set('stock -=', item.amount)
+      .where('ID =', item.book_ID).and('stock >=', item.amount)
+  ))
+  all.forEach((affectedRows, i) => {
+    if (affectedRows === 0) {
+      req.error(409, `${orderItems[i].amount} exceeds stock for book #${orderItems[i].book_ID}`)
+    }
+  })
+
+ return all
+
 }
-
-
-