toString method on PgJsonExpression class

[albertop19]

Custom toString method to get the WHERE clause generated in this criterion

[ilopmar]

Thanks for the PR. Why do you need the where clause generated? How do you plan to use it?

[albertop19]

I need the WHERE clause correctly formed to pass it as a parameter to a function declared in my postgres

[ilopmar]

Thank you very much for your contribution. Included in version 5.2.0