The active TTU of the system at any given time is the version of the driver that was most recently installed on the system. For example, if 17.10 is installed and then 17.20 is installed, then 17.20 is the active TTU.
There are three different choices for odbc.ini and odbcinst.ini.
- Inside the release independent directories. By default, those are /opt/teradata/client/ODBC_32/ and /opt/teradata/client/ODBC_64/.
- Inside the release specific directories. For 17.20, that would be /opt/teradata/client/17.20/odbc_32/ and /opt/teradata/client/17.20/odbc_64/.
- Custom file location. The user can create their own odbc.ini and odbcinst.ini files and put them in any location on the system and set the ODBCINI and ODBCINSTINI environment variables accordingly.
Inside the release independent directories (i.e., /opt/teradata/client/ODBC_32/ and /opt/teradata/client/ODBC_64/) there will be symbolic links for locale, lib, and include which will be pointing to their corresponding directories for the active TTU.