diff --git a/.docker/docker-compose.yml b/.docker/docker-compose.yml
index d13e63c803d544ef129a6f03dbf6267ab6c2f0ec..ce5680133fcfe2690220850359b9f0dc5c28f3c8 100644
--- a/.docker/docker-compose.yml
+++ b/.docker/docker-compose.yml
@@ -419,22 +419,22 @@ services:
     volumes:
       - "${SHARED_VOLUME:-/tmp}:/tmp"
     environment:
-      AUTH_SERVICE_ADMIN: ${AUTH_SERVICE_ADMIN:-admin}
-      AUTH_SERVICE_ADMIN_PASSWORD: ${AUTH_SERVICE_ADMIN_PASSWORD:-admin}
-      AUTH_SERVICE_CLIENT: ${AUTH_SERVICE_CLIENT:-dbrepo-client}
-      AUTH_SERVICE_CLIENT_SECRET: ${AUTH_SERVICE_CLIENT:-MUwRc7yfXSJwX8AdRMWaQC3Nep1VjwgG}
-      AUTH_SERVICE_ENDPOINT: ${AUTH_SERVICE_ENDPOINT:-http://auth-service:8080}
-      BROKER_EXCHANGE_NAME: ${BROKER_EXCHANGE_NAME:-dbrepo}
-      BROKER_QUEUE_NAME: ${BROKER_QUEUE_NAME:-dbrepo}
+      AUTH_SERVICE_ADMIN: "${AUTH_SERVICE_ADMIN:-admin}"
+      AUTH_SERVICE_ADMIN_PASSWORD: "${AUTH_SERVICE_ADMIN_PASSWORD:-admin}"
+      AUTH_SERVICE_CLIENT: "${AUTH_SERVICE_CLIENT:-dbrepo-client}"
+      AUTH_SERVICE_CLIENT_SECRET: "${AUTH_SERVICE_CLIENT:-MUwRc7yfXSJwX8AdRMWaQC3Nep1VjwgG}"
+      AUTH_SERVICE_ENDPOINT: "${AUTH_SERVICE_ENDPOINT:-http://auth-service:8080}"
+      BROKER_EXCHANGE_NAME: "${BROKER_EXCHANGE_NAME:-dbrepo}"
+      BROKER_QUEUE_NAME: "${BROKER_QUEUE_NAME:-dbrepo}"
       BROKER_HOST: "${BROKER_ENDPOINT:-broker-service}"
-      BROKER_PASSWORD: ${SYSTEM_PASSWORD:-admin}
+      BROKER_PASSWORD: "${SYSTEM_PASSWORD:-admin}"
       BROKER_PORT: ${BROKER_PORT:-5672}
-      BROKER_SERVICE_ENDPOINT: ${BROKER_SERVICE_ENDPOINT:-http://gateway-service/admin/broker}
-      BROKER_USERNAME: ${SYSTEM_USERNAME:-admin}
+      BROKER_SERVICE_ENDPOINT: "${BROKER_SERVICE_ENDPOINT:-http://gateway-service/admin/broker}"
+      BROKER_USERNAME: "${SYSTEM_USERNAME:-admin}"
       BROKER_VIRTUALHOST: "${BROKER_VIRTUALHOST:-dbrepo}"
       CONNECTION_TIMEOUT: ${CONNECTION_TIMEOUT:-60000}
-      EXCHANGE_NAME: ${EXCHANGE_NAME:-dbrepo}
-      METADATA_SERVICE_ENDPOINT: ${METADATA_SERVICE_ENDPOINT:-http://metadata-service:8080}
+      EXCHANGE_NAME: "${EXCHANGE_NAME:-dbrepo}"
+      METADATA_SERVICE_ENDPOINT: "${METADATA_SERVICE_ENDPOINT:-http://metadata-service:8080}"
       GRANT_DEFAULT_READ: "${GRANT_DEFAULT_READ:-SELECT}"
       GRANT_DEFAULT_WRITE: "${GRANT_DEFAULT_WRITE:-SELECT, CREATE, CREATE VIEW, CREATE ROUTINE, CREATE TEMPORARY TABLES, LOCK TABLES, INDEX, TRIGGER, INSERT, UPDATE, DELETE}"
       JWT_PUBKEY: "${JWT_PUBKEY:-MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqqnHQ2BWWW9vDNLRCcxD++xZg/16oqMo/c1l+lcFEjjAIJjJp/HqrPYU/U9GvquGE6PbVFtTzW1KcKawOW+FJNOA3CGo8Q1TFEfz43B8rZpKsFbJKvQGVv1Z4HaKPvLUm7iMm8Hv91cLduuoWx6Q3DPe2vg13GKKEZe7UFghF+0T9u8EKzA/XqQ0OiICmsmYPbwvf9N3bCKsB/Y10EYmZRb8IhCoV9mmO5TxgWgiuNeCTtNCv2ePYqL/U0WvyGFW0reasIK8eg3KrAUj8DpyOgPOVBn3lBGf+3KFSYi+0bwZbJZWqbC/Xlk20Go1YfeJPRIt7ImxD27R/lNjgDO/MwIDAQAB}"
diff --git a/dbrepo-data-service/services/src/main/java/at/tuwien/mapper/MariaDbMapper.java b/dbrepo-data-service/services/src/main/java/at/tuwien/mapper/MariaDbMapper.java
index e22f3025d11b67c8f6d2315ff82ae4afb333a65b..74e9ffe66d7428d5fdfb7d94909794f034cfd045 100644
--- a/dbrepo-data-service/services/src/main/java/at/tuwien/mapper/MariaDbMapper.java
+++ b/dbrepo-data-service/services/src/main/java/at/tuwien/mapper/MariaDbMapper.java
@@ -120,7 +120,7 @@ public interface MariaDbMapper {
     }
 
     default String databaseTableConstraintsSelectRawQuery() {
-        final String statement = "SELECT k.`ORDINAL_POSITION`, c.`CONSTRAINT_TYPE`, k.`CONSTRAINT_NAME`, k.`COLUMN_NAME`, k.`REFERENCED_TABLE_NAME`, k.`REFERENCED_COLUMN_NAME`, r.`DELETE_RULE`, r.`UPDATE_RULE` FROM information_schema.TABLE_CONSTRAINTS c JOIN information_schema.KEY_COLUMN_USAGE k ON c.`TABLE_NAME` = k.`TABLE_NAME` AND c.`CONSTRAINT_NAME` = k.`CONSTRAINT_NAME` LEFT JOIN information_schema.REFERENTIAL_CONSTRAINTS r ON r.`CONSTRAINT_NAME` = k.`CONSTRAINT_NAME` AND r.`CONSTRAINT_SCHEMA` = c.`TABLE_SCHEMA` AND r.`TABLE_NAME` = c.`TABLE_NAME` WHERE LOWER(k.`COLUMN_NAME`) != 'row_end' AND c.`TABLE_SCHEMA` = ? AND c.`TABLE_NAME` = ? ORDER BY k.`ORDINAL_POSITION` ASC;";
+        final String statement = "SELECT k.`ORDINAL_POSITION`, c.`CONSTRAINT_TYPE`, k.`CONSTRAINT_NAME`, k.`COLUMN_NAME`, k.`REFERENCED_TABLE_NAME`, k.`REFERENCED_COLUMN_NAME`, r.`DELETE_RULE`, r.`UPDATE_RULE` FROM information_schema.TABLE_CONSTRAINTS c JOIN information_schema.KEY_COLUMN_USAGE k ON c.`TABLE_NAME` = k.`TABLE_NAME` AND c.`CONSTRAINT_NAME` = k.`CONSTRAINT_NAME` AND c.`CONSTRAINT_SCHEMA` = k.`CONSTRAINT_SCHEMA` LEFT JOIN information_schema.REFERENTIAL_CONSTRAINTS r ON r.`CONSTRAINT_NAME` = k.`CONSTRAINT_NAME` AND r.`CONSTRAINT_SCHEMA` = c.`TABLE_SCHEMA` AND r.`TABLE_NAME` = c.`TABLE_NAME` WHERE LOWER(k.`COLUMN_NAME`) != 'row_end' AND c.`TABLE_SCHEMA` = ? AND c.`TABLE_NAME` = ? ORDER BY k.`ORDINAL_POSITION` ASC;";
         log.trace("mapped select table constraints statement: {}", statement);
         return statement;
     }
diff --git a/docker-compose.yml b/docker-compose.yml
index 3c78d4d9e9db11765aa5ea47b7f4c781c9ca1743..3ffd0e04a33d4e09e73b4cb8b8a56dfa487283a3 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -492,10 +492,10 @@ services:
       BROKER_EXCHANGE_NAME: ${BROKER_EXCHANGE_NAME:-dbrepo}
       BROKER_QUEUE_NAME: ${BROKER_QUEUE_NAME:-dbrepo}
       BROKER_HOST: "${BROKER_ENDPOINT:-broker-service}"
-      BROKER_PASSWORD: ${SYSTEM_PASSWORD:-admin}
+      BROKER_PASSWORD: "${SYSTEM_PASSWORD:-admin}"
       BROKER_PORT: ${BROKER_PORT:-5672}
       BROKER_SERVICE_ENDPOINT: ${BROKER_SERVICE_ENDPOINT:-http://gateway-service/admin/broker}
-      BROKER_USERNAME: ${SYSTEM_USERNAME:-admin}
+      BROKER_USERNAME: "${SYSTEM_USERNAME:-admin}"
       BROKER_VIRTUALHOST: "${BROKER_VIRTUALHOST:-dbrepo}"
       CONNECTION_TIMEOUT: ${CONNECTION_TIMEOUT:-60000}
       EXCHANGE_NAME: ${EXCHANGE_NAME:-dbrepo}