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