Teradata CLOB和JDBC：定位器无效，因为它已更改错误

Question

I'm trying to copy CLOB from one database to another. However I get The Locator is invalid because it has been changed error.

This article says this can happen because ResultSet , PreparedStamenent are closed. However all my objects are open. And the error is thrown when I try to executeBatch()

 Statement select = connectionDB1.createStatement(); 
 ResultSet rs = select.executeQuery("SELECT TOP 1 myClob FROM myTab"); 
 rs.next();  
 PreparedStatement ps = connectionDB2.prepareStatement("INSERT INTO myTab2 SELECT ? ");
 ps.setClob(1, rs.getClob(1)); 
 System.out.println("CLOB inserted");
 ps.addBatch();
 ps.executeBatch(); // ERROR is thrown here before I close any objects WHY? 
                   // java.sql.BatchUpdateException

Why does this happen? How to prevent this?

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PS: The above code runs well with any other data type: VARCHAR, DECIMAL

Answer 1

The article says that the CLOB is a locator that is valid in the same session.

But when you try to apply it to another connection, you are using it in a different session, so the error occurs.

What you need to do is to read the actual CLOB content from the source database and write it into the target database.