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Improve error message when using missing column in .SDcols #3116

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MichaelChirico opened this issue Oct 18, 2018 · 0 comments
Closed

Improve error message when using missing column in .SDcols #3116

MichaelChirico opened this issue Oct 18, 2018 · 0 comments
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@MichaelChirico
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@MichaelChirico MichaelChirico commented Oct 18, 2018

Discovered when updating the source table in an ETL and using data.table downstream; source column names changed and gave me an error that's hard to deal with quickly:

DT = data.table(a = 1:5)
DT[ , .SD, .SDcols = 'b']

Error in [.data.table(DT, , .SD, .SDcols = "b") :
Some items of .SDcols are not column names (or are NA)

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