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fread colClasses support for POSIXct #2610

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jangorecki opened this issue Feb 7, 2018 · 2 comments · Fixed by #2545
Closed

fread colClasses support for POSIXct #2610

jangorecki opened this issue Feb 7, 2018 · 2 comments · Fixed by #2545
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@jangorecki
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jangorecki commented Feb 7, 2018

Currently fread colClasses does not support conversion to POSIXct:

str(data.table::fread("c1,c2\n2018-01-31 03:16:57,b", colClasses=c(c1="POSIXct")))
#Classes 'data.table' and 'data.frame':	1 obs. of  2 variables:
# $ c1: chr "2018-01-31 03:16:57"
# $ c2: chr "b"
# - attr(*, ".internal.selfref")=<externalptr> 

related to #1450
once solved update: https://stackoverflow.com/questions/41903259/data-table-colclasses-conversion-to-posixct

@MichaelChirico
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MichaelChirico commented May 2, 2019

Haven't quite closed the SO question since it refers to as.POSIXct being slow on huge data... Related to #587 or #1450 then?

@mattdowle
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mattdowle commented May 2, 2019

Yes: #1450 outstanding.

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