ODBC Client/Server Mode, unexpected scale for non-numeric type

Question

When I connect to Oracle RDB via Oracle ODBC driver, I noticed the SQLBindCol for the CHAR type returns scale=0 while scaleLen=-2. This behavior is different from MS native ODBC driver and also vary from IBM DataDirect. For MS ODBC driver and IBM DataDirect, the scale length for CHAR type is -1 and the scale=0, this is reasonable return because the scale is not used for character type. I don't understand why Oracle ODBC returns scale length 2 for all kinds of data types. The ODBC API call as below. Is this scale length expected for character type?
CREATE TABLE TT01(COL1 CHAR(257));
  // Allocate a statement handle
  rc = SQLAllocHandle(
                       SQL_HANDLE_STMT,
                       odbcConn->m_hdbc,
                       &hstmt1);
  // Get the columns information.
  rc =SQLColumns(
                  hstmt1,
                  NULL, 0,
                  (SQLCHAR *)remote_schema_dscp, -3,
                  (SQLCHAR *)remote_table_dscp, -3,
                  NULL, 0); 
  // Bind columns from the result set.
  rc = SQLBindCol(hstmt1, (short)9, SQL_C_SHORT, &scale,0, &scaleLen);            // scale=0, however scaleLen=2

Answer 1

Dear Yousof,
I want to do the same thing that u'vve already acheived, I want to customize oracle forms texfields and instead of EXTENDING VTextfield I want to extend JTextfield and ofcourse implementing IView interface.
But I get problems, would u mind be kind enough to instruct me in doing that?
Best regrds,
Sasan