In data-integration/simple-jndi/jdbc.properties:

totoDb/type=javax.sql.DataSource
totoDb/driver=com.informix.jdbc.IfxDriver
totoDb/url=jdbc:informix-sqli://123.123.123.123:5432/dbname:INFORMIXSERVER=ddpbasp
totoDb/user=toto1
totoDb/password=blah

When I open spoon, edit connection, explore, get 100 first result from table xyz, I get:

An error occurred executing SQL:
SELECT * FROM xyz
The specified table (toto1.xyz) is not in the database.