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Remove redundant toType overloads with different nullability in convert API

APIIf it touches our APIIf it touches our API

Status: Open.

#1695 In Kotlin/dataframe;

· koperagen opened on Feb 17, 2026

Redesign IO format hierarchy before adding new DataFrame sources

APIIf it touches our APIIf it touches our API

Status: Open.

#450 In Kotlin/dataframe;

· zaleslaw opened on Sep 8, 2023

Unify column accessor APIs (column vs col DSL) before 1.0

APIIf it touches our APIIf it touches our API

Status: Open.

#564 In Kotlin/dataframe;

· Jolanrensen opened on Jan 19, 2024

Use ColumnNameGenerator for consistent column name repair across IO readers

APIIf it touches our APIIf it touches our API

databasesJDBC related issuesJDBC related issues

filesreading/writing from/to filesreading/writing from/to files

Status: Open.

#387 In Kotlin/dataframe;

· zaleslaw opened on Jun 5, 2023

Fix compiler plugin losing generic upper-bound (T : Geo) after DataFrame transformations

bugSomething isn't workingSomething isn't working

Compiler pluginAnything related to the DataFrame Compiler PluginAnything related to the DataFrame Compiler Plugin

Status: Open.

#905 In Kotlin/dataframe;

· koperagen opened on Oct 2, 2024

Added kdocs for DataSchema and DataRowSchema

KDocsImprovements or additions to KDocsImprovements or additions to KDocs

Status: Open (in progress).

Kotlin/dataframenumber 1775

#1775 In Kotlin/dataframe;

· koperagen opened on Mar 27, 2026

Provide filter overload to replace colGroups(predicate<ColumnGroup>)

enhancementNew feature or requestNew feature or request

Status: Open (in progress).

Kotlin/dataframenumber 1359

#1359 In Kotlin/dataframe;

· koperagen opened on Aug 4, 2025

Add internal DataFrame.toCode utility to help convert examples

Status: Open (in progress).

Kotlin/dataframenumber 1603

#1603 In Kotlin/dataframe;

· koperagen opened on Dec 3, 2025

Added require operation

enhancementNew feature or requestNew feature or request

Status: Open (in progress).

Kotlin/dataframenumber 1715

#1715 In Kotlin/dataframe;

· koperagen opened on Feb 27, 2026

readExcel: stringColumns argument fails to match columns that are automatically renamed due to duplication.

questionFurther information is requestedFurther information is requested

Status: Open.

#1791 In Kotlin/dataframe;

· chimission opened on Apr 8, 2026

Documentation for replaceAll

documentationImprovements or additions to documentation (not KDocs)Improvements or additions to documentation (not KDocs)

Status: Open (in progress).

Kotlin/dataframenumber 738

#738 In Kotlin/dataframe;

· koperagen opened on Jun 14, 2024

FieldKind.of logic is wrong for FrameColumn/ColumnGroup

bugSomething isn't workingSomething isn't working

Compiler pluginAnything related to the DataFrame Compiler PluginAnything related to the DataFrame Compiler Plugin

Status: Open.

#1498 In Kotlin/dataframe;

· koperagen opened on Oct 14, 2025

Unblock String API workflows by allowing schema inference from string-based column access

APIIf it touches our APIIf it touches our API

Compiler pluginAnything related to the DataFrame Compiler PluginAnything related to the DataFrame Compiler Plugin

enhancementNew feature or requestNew feature or request

Status: Open.

#1808 In Kotlin/dataframe;

· koperagen opened on Apr 16, 2026

Add detailed error message for type mismatches in generated extension properties

Compiler pluginAnything related to the DataFrame Compiler PluginAnything related to the DataFrame Compiler Plugin

documentationImprovements or additions to documentation (not KDocs)Improvements or additions to documentation (not KDocs)

ToolingKotlin Notebook, Jupyter, ColabKotlin Notebook, Jupyter, Colab

Status: Open.

#1742 In Kotlin/dataframe;

· AndreiKingsley opened on Mar 12, 2026

Add allExcept / except support to compiler plugin

Compiler pluginAnything related to the DataFrame Compiler PluginAnything related to the DataFrame Compiler Plugin

Status: Open.

#1745 In Kotlin/dataframe;

· Jolanrensen opened on Mar 13, 2026

Error when casting dataframe to a @DataSchema class located in another package

bugSomething isn't workingSomething isn't working

Compiler pluginAnything related to the DataFrame Compiler PluginAnything related to the DataFrame Compiler Plugin

Status: Open.

#1877 In Kotlin/dataframe;

· lev-nekrasov opened on May 28, 2026