Sybase TEXT to Oracle CLOB migration

Hi All,
We are doing the migration from Sybase to Oracle 10g.
Migration steps include..
1. Creation of Oracle staging area similar structure as Sybase database.
2. Extract the data through BCP
3. Import to oracle by Sqlldr (sql loader)
But we have problem in migrating the SYBASE TEXT column into ORACLE CLOB, as Sqlldr ( sql loader) can load clob column only 500 bytes, unless we are not using LOBFILE clause.
To use LOBFILE clause, we have to create "Secondary Data file " , But BCP have limitation. It is not supporting custom query to generate CLOB column data file.
Help me in resolving this issue.

umesh chandru wrote:
To use LOBFILE clause, we have to create "Secondary Data file " , But BCP have limitation. It is not supporting custom query to generate CLOB column data file.As I understand it, the core issue is that SQL*Loader wants you to point it to the file containing the CLOB to load. While BCP puts the TEXT/CLOB inline in what is essentially a BCP produced CSV file.
Now this is a problem. As the CLOB can contain all kinds of formatting, including end-of-CSV-row characters, special characters and so on, it can easily render the format of that CSV file useless.
SQL*Loader expects a CSV file where the CLOB column contains a filename to load - and where that file contains the contents of the CLOB. With this approach there is no issues dealing with complex file formatting rules in trying to load the CLOB as a part of a CSV file.
So extract the data in this format - do not restrict yourself to the limitations of BCP. That TEXT column must have a PK column (or two). Write a script that extract the TEXT into a default directory, creating a file that is uniquely identified by the PK.
Extract the rest of the table's content (using BCP for example) into CSV format. Now you have the data in the two parts (CSV file and separate CLOB files) that SQL*Loader expects. Create the appropriate control file and load the data. This should not be that complex to do.

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