Oracle Wokspace 4

dbms_wm.gotodate

begin
dbms_wm.gotoworkspace('B_focus_1');
end;

insert into test values (6,'Wayanad','YS','n',null,sysdate);

select * from test order by one ;

begin
dbms_wm.gotodate( (sysdate-5)) ;
end;

select * from test order by one ;

begin
dbms_wm.gotoworkspace('B_focus_1');
end;

select * from test order by one ;

Freezeworkspace

begin
dbms_wm.freezeworkspace('B_focus_1', 'READ_ONLY');
end;

insert into test values (6,'Wayanad','YS','n',null,sysdate);


This Error will be throwed when we try any DML operations (here to insert data) into a readonly workspace.

ORA-20123: workspace 'B_focus_1' is currently frozen in READ_ONLY mode


Export And Import Implications
The following implications are a result of version-enabling tables:

* Imports of version-enabled tables can only be performed if the target database has Workspace Manager installed and no workspaces defined other than LIVE.
* Only full database exports are supported with version-enabled databases.
* The IGNORE=Y parameter must be set for imports of version enabled databases.
* Imports of version-enabled databases cannot use the FROMUSER and TOUSER functioanlity.

For More about workspaces Refer  here

Oracle Wokspace 3

To Refresh workspace

begin
dbms_wm.gotoworkspace('B_focus_9');
dbms_wm.refreshworkspace('B_focus_9');
end;

But if there are conflicts refreshworkspace will result an error

ORA-20056: conflicts detected for workspace: 'B_focus_9' in table: 'USER.TEST'

LIVE WORKSPACE CANNOT BE REFRESHED

The two rows that changed in both the LIVE and the 'B_focus_9' workspace create a conflict. These conflicts can be seen from the view Test_conf. But first go to the 'B_focus_9' workspace. The conflicts are not visible in this view while being in the LIVE workspace.

--------------------------
To Resolve this conflicts

SELECT * FROM test_conf ORDER BY wm_workspace;

begin
dbms_wm.gotoworkspace('B_focus_9');
dbms_wm.beginresolve('B_focus_9');
dbms_wm.resolveconflicts('B_focus_9','TEST',null/*where clause*/,'PARENT');
commit;
end;

begin
dbms_wm.commitresolve('B_focus_9');
end;

SELECT * FROM test_conf ORDER BY wm_workspace;

After resolving this conflict the workspace can be refreshed

begin
dbms_wm.refreshworkspace('B_focus_9');
end;


Merge Workspace

begin
dbms_wm.mergeworkspace('B_focus_9');
end;


When B_focus_9 workspace is merged into the LIVE workspace. A merge is the opposite of a refresh : it updates the parent workspace (LIVE) with the changes made to the merged workspace (B_focus_9). Where as refresh operation updates the refreshing workspace.
---------------------------------

After MergeWorkspace See Difference

begin
dbms_wm.gotoworkspace('B_focus_1');
end;

select * from test order by one




begin
dbms_wm.gotoworkspace('B_focus_9');
end;

select * from test order by one




begin
dbms_wm.gotoworkspace('LIVE');
end;

select * from test order by one



Here parent workspace (LIVE) was updated by merged workspace (B_focus_9) .

----------------

Oracle Workspace 2

The merge operation does not currently work with versioned tables. The optimizer translates the merge into
insert/update statements on the underlying _LT table

To have several versions of data

create table TEST (
one number primary key, -- Without primary key: ORA-20133:
two varchar2(15), three char(2), four clob,
five blob, six date );

insert into test values (1,'Cochin','NO','Kochi is a vibrant city situated on the south-west coast of the Indian peninsula in the breathtakingly scenic and prosperous state of Kerala, hailed as Gods Own Country',null,sysdate);

insert into test values (2,'Kerala','YS','n',null,sysdate);
insert into test values (3,'TVM','NO','n',null,sysdate);
insert into test values (4,'Calicut','NO','n',null,sysdate);
insert into test values (5,'Kannur','YS','n',null,sysdate);

commit;

begin
dbms_wm.enableversioning ('test');
end;

begin
dbms_wm.createworkspace ('B_focus_1');
dbms_wm.createworkspace ('B_focus_9' );
end;

begin
dbms_wm.gotoworkspace('B_focus_1');
dbms_wm.createworkspace ('test' );
end;

select workspace, parent_workspace from user_workspaces;

select * from test order by one;

update test set two='Kasargode',three='NO',four='Top end of Kerala',Six=sysdate where one=2;

commit;



begin
dbms_wm.gotoworkspace('LIVE');
end;

select * from test order by one



begin
dbms_wm.gotoworkspace('B_focus_9');
end;

select * from test order by one

update test set two='Thrissur',three='NO',four='Middle of Kerala',Six=sysdate where one=2;
commit;

select * from test order by one



begin
dbms_wm.gotoworkspace('test');
end;

select * from test order by one