final columns that must be in the resultant row
previous iterator, if the iterator is chained
filters for the iterator
Returns the internal iterator that will return the data used to construct the final row.
Returns the internal iterator that will return the data used to construct the final row.
filters for the iterator
internal iterator
Given the object returned by the internal iterator, this method must transform that object into a RawRow.
Given the object returned by the internal iterator, this method must transform that object into a RawRow.
object returned by the internal iterator
raw row
(Changed in version 2.8.0) collect has changed. The previous behavior can be reproduced with toSeq.
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Iterator that can have a previous iterator to output chained values.
type of data returned by the internal iterator