Specifies the location of the .odbc.ini file.
ODBCHOME=odbc-ini-directory
The .odbc.ini file is the system information file that contains ODBC data sources. If the file is named anything other than .odbc.ini, you must use the ODBCINI or ODBC_INI environment variable to specify its location.
For information about the algorithm for locating ODBC data sources, see ODBC data sources on Unix.