sqlest.extractor
An extractor that returns None if all of the columns in the inner extractor are null in the ResultSet.
None
inner
null
If any underlying column is non-null, this returns Some of inner's result.
Some
An extractor that returns
None
if all of the columns in theinner
extractor arenull
in the ResultSet.If any underlying column is non-
null
, this returnsSome
ofinner
's result.