Most robust way to preserve data insert into CLOB?

Question

Hello.
When inserting data into a CLOB column, some of the characters are not being preserved, such as ellipsis characters and other unusual characters. The data is being inserted via JDBC as a simple Java string sql statement in a Statement object. So, what is the most appropriate way to insert information into a CLOB such that all characters are preserved? (Do I have to use PreparedStatements or Clob.setString()?)
For example, the following sql insert:
"INSERT INTO t1 (myClob) VALUES ('Hello ... how are you?');"
Will end up inserting something like:
"Hello ? how are you?"
The ellipsis character (Unicode U+2026, I believe) is changed to something else. How can I preserve this and other characters? Thanks in advance.

Answer 1

Hi,
Must have something to do with NCHAR or Unicode characters.
Here are the notes i put in chapter 8 of my book, section 8.2.2
Notes:
Pre-10.2 JDBC does not support NCHAR literal (n'...') containing
Unicode characters that cannot be represented in the database character
set.
Using 10.2 JDBC against 10.2 RDBMS, NCHAR literals (n'...')
are converted to Unicode literals (u'...'); non-ASCII characters
are converted to their corresponding Unicode escape sequence.
Using 10.2 JDBC against pre-10.2 RDBMS, NCHAR literals (n'...') are
not converted and generate undetermined content for characters that
cannot be represented in the database character set.
Fwiw, here is my blog entry relative to Lobs (CLOB, BLOB, BFILE) :
http://db360.blogspot.com/2006/11/get-bolder-with-lobs-manipulation-in.html
Kuassi, http://db360.blogspot.com/2006/08/oracle-database-programming-using-java_01.html