Configuration
Since the IBM® Informix® ODBC Driver supports different types of Unicode on UNIX platforms, the type of Unicode used by an application must be indicated in the ODBC section of the odbc.ini file.
Indicate the type of Unicode in the ODBC section as follows:
[ODBC]
.
.
.
UNICODE=UCS-4Important: A Unicode-enabled
application must indicate the type of Unicode used in the odbc.ini file.
If the Unicode parameter is not set in odbc.ini,
the default type is UCS-4.
It is required that all UNIX ODBC
applications must set the Unicode type in the odbc.ini file
as follows:
- An ANSI ODBC application on UNIX (including AIX® 64-bit) must set UNICODE=UCS-4
- An ANSI ODBC application on IBM AIX 32-bit must set UNICODE-UCS-2
- An ANSI ODBC application that uses the Data Direct (formerly Merant) ODBC driver manager never indicates a Unicode type other than UTF-8 in the odbc.ini file.
The following table provides an overview of the odbc.ini settings:
| Platform | Driver manager | odbc.ini setting |
|---|---|---|
| AIX | Data Direct | UTF-8 |
| AIX 32–bit | DMR or none | UCS-2 |
| AIX 64–bit | Data Direct | UTF-8 |
| UNIX | Data Direct | UTF-8 |
| UNIX | DMR or none | UCS-4 |
| Windows | Windows ODBC Driver Manager | N/A |
Important:
If all of the following conditions exist,
the settings are automatically reset without any warning or error
message:
- The application is an ANSI application.
- You are linking with DMR or none.
- The Unicode setting in the odbc.ini file does not match the values shown in the table.