Issues

• Add column ranking with tie and missing-value policies

  API
  Kotlin/dataframe#2149 · Filter by author Kanish2002 opened on Oct 12, 2026

• Add primitive numeric cumulative product on DataColumn

  API
  Kotlin/dataframe#2147 · Filter by author Kanish2002 opened on Oct 12, 2026

• Add type-preserving cumulative maximum on DataColumn

  API
  Kotlin/dataframe#2145 · Filter by author Kanish2002 opened on Oct 12, 2026

• Add type-preserving cumulative minimum on DataColumn

  API
  Kotlin/dataframe#2143 · Filter by author Kanish2002 opened on Oct 12, 2026
  4

• Compiler plugin: refine reorderColumnsBy / reorderColumnsByName with inFrameColumns

  Compiler plugin
  Kotlin/dataframe#2139 · Filter by author zaleslaw opened on Oct 8, 2026 · 1.1

• toDataFrame drops the ? of a type parameter inside a property type: List<V?> becomes List<Int>

  bug
  Kotlin/dataframe#2133 · Filter by author zaleslaw opened on Oct 6, 2026 · 1.1
  1

• DataFrame.concat(rows) drops the schema of a zero-row receiver

  bug
  Kotlin/dataframe#2131 · Filter by author Allex-Nik opened on Oct 5, 2026
  1

• Add compiler plugin support for concat overloads with vararg on DataRow and DataFrame

  Compiler pluginenhancement
  Kotlin/dataframe#2129 · Filter by author Allex-Nik opened on Oct 5, 2026

• toList() and toSequence() throw with the compiler plugin right after toDataFrame()

  bugCompiler plugin
  Kotlin/dataframe#2127 · Filter by author zaleslaw opened on Oct 5, 2026 · 1.1
  2

• Validate the size of List values appended to a ColumnGroup

  enhancement
  Kotlin/dataframe#2126 · Filter by author Allex-Nik opened on Oct 5, 2026
  1

• Add compiler plugin support for append and appendNulls

  Compiler pluginenhancement
  Kotlin/dataframe#2124 · Filter by author Allex-Nik opened on Oct 5, 2026

• aggregateFor does not use default for statistics

  APIbug
  Kotlin/dataframe#2118 · Filter by author Jolanrensen opened on Sep 30, 2026

• Kotlin DataFrame plugin: unfold and toDataFrame with properties give an empty schema

  Kotlin/dataframe#2115 · Filter by author zaleslaw opened on Sep 29, 2026 · 1.0
  1

  

• unfold is not consistent with toDataFrame and with the compiler plugin

  Kotlin/dataframe#2114 · Filter by author zaleslaw opened on Sep 29, 2026 · 1.0
  1

  

• Remove CLAUDE.md files from the repo

  AX
  Kotlin/dataframe#2105 · Filter by author Jolanrensen opened on Sep 23, 2026

• PostgreSQL: a whole family of types is read as an opaque Any (PGobject)

  databases
  Kotlin/dataframe#2103 · Filter by author zaleslaw opened on Sep 22, 2026 · 1.0
  

• Idea: Polymorphism for the compiler plugin

  Compiler plugin
  Kotlin/dataframe#2097 · Filter by author Jolanrensen opened on Sep 21, 2026
  1

• Arrow write: one bad value inside a ColumnGroup aborts the whole export, even in Mode.LOYAL

  bugfiles
  Kotlin/dataframe#2075 · Filter by author zaleslaw opened on Sep 11, 2026 · 1.0
  

• Update DataFrame interface kdocs

  KDocs
  Kotlin/dataframe#2073 · Filter by author koperagen opened on Sep 10, 2026 · 1.0
  

• convert date-time results depend on the JVM default time zone

  APIenhancement
  Kotlin/dataframe#2072 · Filter by author zaleslaw opened on Sep 10, 2026
  1

• indices() on BaseColumn is ambiguous for a ColumnGroup

  bug
  Kotlin/dataframe#2067 · Filter by author zaleslaw opened on Sep 8, 2026 · 1.0
  2

  

• Guard BitVectorHelper.getNullCount in StructVector.nullMaskOrNull

  filesperformance
  Kotlin/dataframe#2064 · Filter by author koperagen opened on Sep 4, 2026 · 1.0
  1

  

• JoinWith operations that can introduce nulls (leftJoin, rightJoin, etc) produce FrameColumns with misleading schema resulting in potential column not found exceptions

  bug
  Kotlin/dataframe#2040 · Filter by author koperagen opened on Aug 24, 2026 · 1.0

• Join operations that can introduce nulls (leftJoin, rightJoin, etc) lead to null values FrameColumn and NPE on basic operations

  bug
  Kotlin/dataframe#2039 · Filter by author koperagen opened on Aug 24, 2026 · 1.0
  1

• List of all nulls (Nothing? type) produces unexpected ColumnGroup column kind instead of ValueColumn

  bug
  Kotlin/dataframe#2034 · Filter by author koperagen opened on Aug 19, 2026 · 1.0
  2