To update large dataset in columnar database (Sybase IQ)

Question

Hi,
I want to update a column with random values in Sybase IQ.The no of rows are very large(approx 2 crore).
I have created a procedure using cursor.
it is working fine with low dataset but having performance issue with large dataset.
Is there a workaround for this issue.
regards,
Neha Khetan

Answer 1

Hi Eugene,
Is it possible to implement this in BDB JE somehowYes, you can create a new separate database for storing the sets of integers. Each record in this database would be one partition (e.g., 1001-2000) for one record in the "main" database.
The key to this database would be a two part key:
- the key to the "main" database, followed by
- the beginning partition value (e.g., 1001)
For example:
Main Database:
  Key     Data
   X      string/integer parameters for X
   Y      string/integer parameters for Y
Integer Partition Database:
  Key     Data
  X,1     Set of integers in range 1-1000 for X
  X,1001  Set of integers in range 1001-2000 for X
  Y,1     Set of integers in range 1-1000 for Y
  Y,1001  Set of integers in range 1001-2000 for Y
   ...Two part keys are easy to implement with a tuple binding. You simply read/write the two fields for the record key, one after another, in the same way that you read/write multiple fields in the record data.
Mark