Issues caused by changing length semantics

Hi All,
Our database was formerly using BYTE for columns of tables and for stored procedures. We recently changed the Length Semantics to CHAR but caused some issues. An ORA-06502 pl/sql numeric or value error character string buffer too small appears when we access the database's stored procedures via Java. What could be the possible cause of this? Could you give me some paths to take in troubleshooting this issue?
Thanks to all!
Edited by: 1002671 on 25.4.2013 23:55

1002671 wrote:
Thanks for answering Sir! Are you kidding!!! No 'Sir' please... Common I don't know anything yet.
Correct me if I'm wrong but doesn't CHAR already handle multi-byte characters passed to or used in stored procedures? I'm really not that knowledgeable when it comes to the effects of changing the Length Semantics. We already changed the columns from VARCHAR2(BYTE) to VARCHAR2(CHAR). The problem lies within the stored procedures.I'm not clear on your doubt, but please check this -
Link: http://docs.oracle.com/cd/E11882_01/appdev.112/e10472/datatypes.htm (Section 'Declaring Variables for Multibyte Characters')
>
When declaring a CHAR or VARCHAR2 variable, to ensure that it can always hold n characters in any multibyte character set, declare its length in characters—that is, CHAR(n CHAR) or VARCHAR2(n CHAR), where n does not exceed FLOOR(32767/4) = 8191.
>
What i feel is you getting confused with the SQL data-type 'VARCHAR2' (i.e. used in specifying column type) and PL/SQL data-type 'VARCHAR2' (i.e. used while declaring variables)
Then check this : difference between BYTE & CHAR
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