The effective date/time of a changing date/time column dt is the last
change before that change becomes effective, i.e. when dt == timestamp.
Usage
stream_effective_date(stream, column, by = NULL)
Arguments
- stream
data.table with timestamp, and the columns named in column
and by, if defined.
- column
character(1) column name to make effective, must identify
a date or datetime column.
- by
character(1) optional column name to group rows by
Value
data.table with columns named by column and by