SCB-1111 fixed the demo starting error
diff --git a/alpha/alpha-server/src/main/resources/application.yaml b/alpha/alpha-server/src/main/resources/application.yaml
index b8cd118..7efd6de 100644
--- a/alpha/alpha-server/src/main/resources/application.yaml
+++ b/alpha/alpha-server/src/main/resources/application.yaml
@@ -22,6 +22,13 @@
     host: 0.0.0.0
     port: 8080
 
+# EclipseLink will attempt to create tables. If the table exists, EclipseLink will add any missing columns.
+spring:
+  jpa:
+    properties:
+      eclipselink:
+        ddl-generation: create-or-extend-tables
+
 ---
 spring:
   profiles: ssl
@@ -42,7 +49,7 @@
     password: password
     url: jdbc:postgresql://postgresql.servicecomb.io:5432/saga?useSSL=false
     platform: postgresql
-#    continue-on-error: true
+    continue-on-error: true
 
 ---
 spring:
@@ -53,7 +60,3 @@
     url: jdbc:mysql://mysql.servicecomb.io:3306/saga?useSSL=false
     platform: mysql
     continue-on-error: true
-  jpa:
-    properties:
-      eclipselink:
-        ddl-generation: none