• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

Challenging Blob read

 
Greenhorn
Posts: 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi All,
Thanks for your time.
I want to know how to read from the blob and display string.
There is a table Employee (name,id)
name varchar2(32)
id number(10)
There is another table Employee_BLOB with a column emp_blob which is blob.
Now Employee_BLOB table has only one row and one column. In that the blob data
stored is all the records of the Employee table.
This meams if Employee table has 10000 rows. Then the emp_blob column in only one
row has data in the binary format for all the 10000 rows of Employee table.

Now, I can read the blob from the Employee_BLOB table. But how do I get back the
name and id values from it ?
Because of business requirements the datastructure of Employee and Employee_Blob
CANNOT be changes. Also, I can not read from Employee. I have to read from
Employee_Blob and get back all the rows of Employee and store it in JTableModel.
Any help ?
I have something like this to read the blob:
But how do I extract the data from it ?
 
Rancher
Posts: 13459
Android Eclipse IDE Ubuntu
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
"bindhya_prasad",
The Java Ranch has thousands of visitors every week, many with surprisingly similar names. To avoid confusion we have a naming convention, described at http://www.javaranch.com/name.jsp .
We require names to have at least two words, separated by a space, and strongly recommend that you use your full real name. Please re-register and select a new name which meets the requirements.
Thanks.
Dave
 
David O'Meara
Rancher
Posts: 13459
Android Eclipse IDE Ubuntu
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
So you say you can read and write the blob, but after reading as a byte array you want to get the data abck?
How is the data stored? Is it a great big String (you can try new String(bytes) ) or is it serialized objects? Something else perhaps?
Dave.
 
Consider Paul's rocket mass heater.
reply
    Bookmark Topic Watch Topic
  • New Topic