SQL Developer 3.1 EA - Database Diff Issues

Question

Hi
I am using SQL Developer 3.1 EA to generate database difference script to upgrade my db. This is really very useful and very good tool for compare two different databases and generate the difference script.
There are few bugs (?) identified while using database diff tool.
1. If there is a column mismatch in Source and Destination tables, directly drop the table and recreate new one. This is not a good solution for upgrading database with some other database (data loss is the major issue). Microsoft handled this situation in VS2010 to create temp table with new structure then move data to the temp table and finally drop the original table and rename temp table to original. I am expecting the same method in Database Diff also.
Sample Code:
--Changed TABLE
--F_SYSTEM_2
DROP TABLE "ED9461001ER09_D1"."F_SYSTEM_2";
CREATE TABLE "ED9461001ER09_D1"."F_SYSTEM_2"
(     "SYS2_SEQN" NUMBER(9,0) DEFAULT 0 NOT NULL ENABLE, ....
2. Primary key constraint created with table creation for new tables. But late point of time, Create unique index statement also trying to create the same to lead runtime error.
Sample Code:
--New TABLE
--F_SYSTEM_3
CREATE TABLE "ED9461001ER09_D1"."F_SYSTEM_3"
(     "SYS3_CORVU_DB_NAME" VARCHAR2(50),
     "SYS3_CORVU_DB_SCAP" VARCHAR2(8),
     "SYS3_CORVU_DB_VIEWURL" VARCHAR2(2048),
     "SYS3_CORVU_HP_NAME" VARCHAR2(50),
     CONSTRAINT "PK_F_SYSTEM_3" PRIMARY KEY ("SYS3_SEQU") ENABLE
--New INDEX
--PK_F_SYSTEM_3
CREATE UNIQUE INDEX "ED9461001ER09_D1"."PK_F_SYSTEM_3" ON "ED9461001ER09_D1"."F_SYSTEM_3" ("SYS3_SEQU");
3. If there is an difference in procedures, script generated with two Create Procedure statements (Source and Destination) which is irrelevant.
--Changed PROCEDURE
--GET_DI_COUNT
CREATE OR REPLACE PROCEDURE "ED9461001ER09_D1"."GET_DI_COUNT"      (PP_SEQU int,
--Changed PROCEDURE
--GET_DI_COUNT
CREATE OR REPLACE PROCEDURE EDISAPAC10_D1.GET_DI_COUNT      (PP_SEQU int,
I am expecting your solution / clarification.
Regards
Nagarajan Santhan

Answer 1

1. Makes sense. You can request this at the SQL Developer Exchange, so other users can vote and add weight for possible future implementation.
2. Long standing bug. As it won't make your computer explode, apparently low priority to fix.
3. I'm unable to use the comparison feature in EA3. I do get the progress dialog comparing the different procedures and functions, but when finished it just disappears, and no comparison sheet opens, like the whole operation just got cancelled. No exceptions in the console, just a lot of these in the logging page:
update returning false for Grid1oracle.ide.Context[{Context.WORKSPACE=Databases.jws, Context.PROJECT=IdeConnections%23DES+-+Reddis.jpr, Context.SELECTION=[Loracle.ide.model.Element;@1353c19, Context.EVENT=null, Context.VIEW=LoggingMessagePane.Logging Page}]Can someone from the team suggest something to debug?
Thanks,
K.