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deprecate multiple columns to be defined as scalar character

breaking-changeissues whose solution would require breaking existing behaviorissues whose solution would require breaking existing behavior

consistency

Status: Open.

#4357 In Rdatatable/data.table;

· jangorecki opened on Apr 5, 2020

updating data.table by reference has side effect of altering other non-data.table objects

breaking-changeissues whose solution would require breaking existing behaviorissues whose solution would require breaking existing behavior

Status: Open.

#5756 In Rdatatable/data.table;

· domwoolf opened on Nov 23, 2023

Using names(obj) <- names(dt) could be problematic

by-referenceIssues related to by-reference/copying behaviorIssues related to by-reference/copying behavior

Status: Open.

#5079 In Rdatatable/data.table;

· renkun-ken opened on Jul 22, 2021

.I in DT[i, .I, by] should return row numbers of DT not of DT[i]

question

Status: Open.

#1494 In Rdatatable/data.table;

· mattdowle opened on Jan 12, 2016

Symbol .I consistency when not grouping

bug

consistency

Status: Open.

#2598 In Rdatatable/data.table;

· mattdowle opened on Jan 30, 2018

join in [.data.table could be consistent to SQL

breaking-changeissues whose solution would require breaking existing behaviorissues whose solution would require breaking existing behavior

enhancement

joinsUse label:"non-equi joins" for rolling, overlapping, and non-equi joinsUse label:"non-equi joins" for rolling, overlapping, and non-equi joins

question

Status: Open.

#1615 In Rdatatable/data.table;

· jangorecki opened on Mar 29, 2016

aggregate same variable as groupby on-the-fly expression won't make it length 1

consistency

Status: Open.

#4079 In Rdatatable/data.table;

· jangorecki opened on Nov 26, 2019

Columns used in a function in by are not available in j

bug

Status: Open.

#1427 In Rdatatable/data.table;

· renkun-ken opened on Nov 10, 2015

deprecate programming interfaces: get, mget, eval

breaking-changeissues whose solution would require breaking existing behaviorissues whose solution would require breaking existing behavior

programmingparameterizing queries: get, mget, eval, envparameterizing queries: get, mget, eval, env

Status: Open.

#5886 In Rdatatable/data.table;

· jangorecki opened on Jan 7, 2024

Inconsistent copy behavior when subsetting

consistency

Status: Open.

#2254 In Rdatatable/data.table;

· renkun-ken opened on Jul 7, 2017

Inconsistent deep/shallow copying when subsetting using an always TRUE condition

consistency

Status: Open.

#4740 In Rdatatable/data.table;

· NoProblemJack opened on Oct 5, 2020

local and global versions of .I, .N

breaking-changeissues whose solution would require breaking existing behaviorissues whose solution would require breaking existing behavior

feature request

Status: Open.

#1206 In Rdatatable/data.table;

· MichaelChirico opened on Jul 3, 2015

Should .SD include a column used to create an ad-hoc 'by'?

breaking-changeissues whose solution would require breaking existing behaviorissues whose solution would require breaking existing behavior

Status: Open.

#6388 In Rdatatable/data.table;

· MichaelChirico opened on Aug 22, 2024