1.19.0

Issues

• Topn doing order |> head/tail

  Unread
  Rdatatable/data.table#5167·ben-schwen opened Sep 17, 2021 · Updated Jan 9, 2026
  39

• shift give.names could apply auto-name logic to list() input

  feature request
  Rdatatable/data.table#3905 · Filter by author MichaelChirico opened on Sep 23, 2019 · 1.19.0
  6

• Calculations with many groups are much slower by default than with setDTthreads(1)

  openmp
  Rdatatable/data.table#4294 · Filter by author nhirschey opened on Mar 9, 2020 · 1.19.0
  13

• Join with NA can alter the type of the column

  bugHighjoinsregression
  Rdatatable/data.table#4367 · Filter by author tdeenes opened on Apr 9, 2020 · 1.19.0
  1

• separate index attributes from index

  Highinternalsperformancequestion
  Rdatatable/data.table#4467 · Filter by author jangorecki opened on May 21, 2020 · 1.19.0
  1

• keepLeadingZeros interferes with date recognition

  consistencyfread
  Rdatatable/data.table#4869 · Filter by author rmcd1024 opened on Jan 9, 2021 · 1.19.0
  4

• Passing named lists to .SDcols / .SD

  programmingtop request
  Rdatatable/data.table#5020 · Filter by author grantmcdermott opened on May 21, 2021 · 1.19.0
  26

• print.data.table with trunc.cols=TRUE doesn't wrap the truncated column name list

  enhancementprint
  Rdatatable/data.table#5034 · Filter by author ChristopherEeles opened on Jun 1, 2021 · 1.19.0
  4

  

• More tests detecting invalid index using selfrefok

  tests
  Rdatatable/data.table#5085 · Filter by author mattdowle opened on Jul 28, 2021 · 1.19.0

• review setDTthreads matching nth allocation

  internals
  Rdatatable/data.table#5093 · Filter by author mattdowle opened on Aug 4, 2021 · 1.19.0

• ngettext() shouldn't be used to pluralize formally in some cases

  translation
  Rdatatable/data.table#6796 · Filter by author MichaelChirico opened on Feb 4, 2025 · 1.19.0
  2

• export is.sorted

  feature request
  Rdatatable/data.table#2325 · Filter by author franknarf1 opened on Aug 30, 2017 · 1.19.0
  3

• Assigning NA_real_ to multiple rows

  consistency
  Rdatatable/data.table#2959 · Filter by author MichaelChirico opened on Jul 2, 2018 · 1.19.0
  2

• Overbroad issue about .. being defined in calling scope?

  programming
  Rdatatable/data.table#2988 · Filter by author MichaelChirico opened on Jul 31, 2018 · 1.19.0
  14

• join operation almost 2 times slower

  Highjoinsperformanceregression
  Rdatatable/data.table#3928 · Filter by author vk111 opened on Oct 2, 2019 · 1.19.0
  29

• Invalid .internal.selfref detected when a data.table is set as an attribute with setattr

  by-reference
  Rdatatable/data.table#3959 · Filter by author d-sci opened on Oct 10, 2019 · 1.19.0
  8

• dt[, (cols) := list(...), by = group] should not silently recycles list

  consistencynon-atomic column
  Rdatatable/data.table#4022 · Filter by author renkun-ken opened on Nov 2, 2019 · 1.19.0
  3

• Interface for melting data.frame?

  breaking-changereshape
  Rdatatable/data.table#4024 · Filter by author benwhalley opened on Nov 2, 2019 · 1.19.0
  2

• Progress deprecation of substitute() on LHS of :=

  breaking-change
  Rdatatable/data.table#6649 · Filter by author MichaelChirico opened on Dec 10, 2024 · 1.19.0
  

• Add introductory general principles to benchmarking vignette

  documentation
  Rdatatable/data.table#3028 · Filter by author mattdowle opened on Sep 4, 2018 · 1.19.0

• fwrite: avoid converting matrix input to data.table

  fwrite
  Rdatatable/data.table#3188 · Filter by author mattdowle opened on Dec 6, 2018 · 1.19.0
  7

• Add a na.rm argument to first()/last()

  feature request
  Rdatatable/data.table#4239 · Filter by author nbenn opened on Feb 12, 2020 · 1.19.0
  1

• trunc.IDate/round.IDate behaviour

  IDate/ITime
  Rdatatable/data.table#4335 · Filter by author artemklevtsov opened on Apr 1, 2020 · 1.19.0
  2

• Inconsistent semantics after setDT

  consistency
  Rdatatable/data.table#4783 · Filter by author OfekShilon opened on Oct 27, 2020 · 1.19.0
  21

• setDT modifies the class of the origin data.frame

  by-reference
  Rdatatable/data.table#4784 · Filter by author OfekShilon opened on Oct 27, 2020 · 1.19.0
  2