Properties directly supported by the Oracle JDBC driver that are not part of the JDBC specification cannot be used as a Custom Property in a datasource.
The Oracle JDBC driver has added support for a new Custom Property under connectionProperties..
Resolving The Problem
The method used with datasources is to set a Custom Property in the datasource as follows:
For example, if you wish to set the property oracle.jdbc.V8Compatible=true, then you would specify the following.
15 June 2018