org/hibernate/engine/jdbc/connections/internal/DatasourceConnectionProviderImpl.java

    @Override
public DatabaseConnectionInfo getDatabaseConnectionInfo(Dialect dialect) {
    return new DatabaseConnectionInfoImpl(
            "Connecting through datasource '" + (dataSourceJndiName != null ? dataSourceJndiName : dataSource) + "'",
            null,
            dialect.getVersion(),
            null,
            null,
            null,
            null
    );
}

This is the current code, do not to try to get the info, until the code of hibernate core is change.

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