weizhouapache commented on code in PR #7381:
URL: https://github.com/apache/cloudstack/pull/7381#discussion_r1159360464


##########
engine/schema/src/main/java/com/cloud/upgrade/dao/DatabaseAccessObject.java:
##########
@@ -26,6 +26,17 @@ public class DatabaseAccessObject {
 
     private static Logger s_logger = 
Logger.getLogger(DatabaseAccessObject.class);
 
+    public void addForeignKey(Connection conn, String tableName, String 
tableColumn, String foreignTableName, String foreignColumnName) {
+        String addForeignKeyStmt = String.format("CALL 
`cloud`.`IDEMPOTENT_ADD_FOREIGN_KEY`('%s', '%s', '%s', '%s')", tableName, 
tableColumn, foreignTableName, foreignColumnName);

Review Comment:
   @harikrishna-patnala 
   you can use `ALTER TABLE xxx ADD CONSTRAINT xxx` instead of 
cloud`.`IDEMPOTENT_ADD_FOREIGN_KEY`



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