Handling citext and uuid as types

[johannspies]

More a question or request than an issue:

How can I add citext and uuid as PostgreSQL-types handled by PostgreSQL.jl?

At the moment I have do casting in the query like this:

Select title::text from wos_2016_2.article where title = 'Mouse Clicks and Key StrOkes';

where title is of the type 'citext';

[iamed2]

In https://github.com/JuliaDB/PostgreSQL.jl/blob/master/src/types.jl:

• Make a newpgtype call (you have to know the OID for the type)
• Define a jldata method
• Define a pgdata method

timestamp is a good example to follow.