31 Pull requests merged by 6 people

• Extension property name generation fix & docs & tests

  #1380 merged Aug 15, 2025

• Fixed reading Parquet file on Windows

  #1381 merged Aug 15, 2025

• Initialize JetBrains Junie 🚀

  #1379 merged Aug 14, 2025

• Format colgroups

  #1374 merged Aug 13, 2025

• Add Hibernate example with H2 in-memory database to idea-examples

  #1367 merged Aug 12, 2025

• Fix jupyter logger

  #1361 merged Aug 12, 2025

• android example

  #1349 merged Aug 12, 2025

• cols with default argument deprecation

  #1369 merged Aug 12, 2025

• add spelling conventions and name fixes in a whole project

  #1364 merged Aug 11, 2025

• clarify how to create BaseColumn

  #1371 merged Aug 11, 2025

• skipKodex gradle parameter in dataframe-csv

  #1370 merged Aug 11, 2025

• duckdb support

  #1366 merged Aug 8, 2025

• count and countDistinct kdocs

  #1301 merged Aug 6, 2025

• format kdocs++

  #1346 merged Aug 6, 2025

• Rollback parameter name to keep compatibility with the compiler plugin

  #1358 merged Aug 5, 2025

• Adds tableTypes to DbType

  #1283 merged Aug 5, 2025

• Add support for reading parquet file thanks to arrow-dataset #576

  #577 merged Aug 5, 2025

• Add plugin annotations for a new batch of functions

  #1362 merged Aug 5, 2025

• Hide mapToColumn in CS DSL in favor of expr

  #1360 merged Aug 5, 2025

• Setup docs

  #1357 merged Jul 31, 2025

• Data sources docs

  #1352 merged Jul 29, 2025

• Data schemas docs

  #1339 merged Jul 24, 2025

• generateCode.kt refactor, KDocs, documentation fixes, and tests

  #1311 merged Jul 23, 2025

• parseExperimentalUuid in ParserOptions

  #1306 merged Jul 23, 2025

• Add deprecated filterNotNull for discoverability of dropNulls

  #1334 merged Jul 18, 2025

• Migrate publishing

  #1331 merged Jul 18, 2025

• add missed compiler annotations for update

  #1333 merged Jul 18, 2025

• add compiler annotations for dropNA

  #1330 merged Jul 17, 2025

• Add support for validating SQL queries with the WITH clause

  #1327 merged Jul 16, 2025

• Added readOnly mode

  #1325 merged Jul 16, 2025

• Improve SQL validation logic and add related test

  #1324 merged Jul 15, 2025

7 Pull requests opened by 4 people

• Add "Migrating from Pandas" guide

  #1328 opened Jul 17, 2025

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

  #1359 opened Aug 4, 2025

• migration from kotlinx.datetime.Instant -> kotlin.time.Instant

  #1368 opened Aug 6, 2025

• Migration to kotlin.time.Instant and kotlinx-datetime 0.7.1

  #1373 opened Aug 11, 2025

• Add SQL-to-Kotlin DataFrame transition guide for backend developers

  #1377 opened Aug 13, 2025

• Migrate usages of deprecated API in implementation & warning fixes

  #1382 opened Aug 14, 2025

• Add support for read-only mode in DuckDB and SQLite

  #1383 opened Aug 14, 2025

32 Issues closed by 5 people

• Bug with line break in column name props generation + align `renameToCamelCase` and normalization behavior

  #1193 closed Aug 15, 2025

• Reading of Parquet files failed on Windows

  #1378 closed Aug 15, 2025

• `format { col.group }` impossible

  #1356 closed Aug 13, 2025

• Add a Hibernate example to the Unsupported Data Sources Example folder

  #1363 closed Aug 12, 2025

• Fix excel module logger

  #1155 closed Aug 12, 2025

• Remove default predicate for `cols {}` in Selection DSL

  #1284 closed Aug 12, 2025

• Add DuckDB support

  #1341 closed Aug 8, 2025

• Add KDocs for `count` and `countDisctinct` functions

  #1276 closed Aug 6, 2025

• textColor does not work for number colums

  #251 closed Aug 6, 2025

• Add KDocs and Unit tests for function `format`

  #1280 closed Aug 6, 2025

• `readAllSqlTables` fails for some custom databases like `DuckDb`

  #1282 closed Aug 5, 2025

• Unable to build due to DEX issue

  #1332 closed Aug 5, 2025

• Add support for reading Parquet files

  #576 closed Aug 5, 2025

• Make mapToColumn internal

  #1105 closed Aug 5, 2025

• Documentation and README lack information about Kotlin Notebook

  #766 closed Aug 1, 2025

• Update all "Get Started" pages

  #1249 closed Jul 31, 2025

• Add a chapter "Integration" for the Guides of unsupported data sources or frameworks which has no special module, like Exposed, Spark, DuckDB and so on

  #1298 closed Jul 31, 2025

• Bump Kotlin libs publisher

  #1313 closed Jul 30, 2025

• df.dropNulls can be hard to find

  #1099 closed Jul 30, 2025

• Generate fields in REPL for data schemas

  #867 closed Jul 30, 2025

• Update a README with examples descriptions

  #799 closed Jul 30, 2025

• Add a migration guide for Pandas developers

  #790 closed Jul 30, 2025

• Add an actual table of all functions with level of support in Compiler Plugin

  #777 closed Jul 30, 2025

• Incorrect outputs for the `add` example

  #582 closed Jul 30, 2025

• Create a section `Data Sources` and create under this section separate pages for all supported data sources

  #1293 closed Jul 29, 2025

• `format` `textColor` only works when targeting the whole dataframe

  #1355 closed Jul 29, 2025

• Migrate Overview page to the Concept page and collect all Library's conceptions and design decisions under one section

  #1297 closed Jul 24, 2025

• Add Unit tests and KDocs for family of `generate<Something>` methods

  #1281 closed Jul 23, 2025

• Make `kotlin.uuid.Uuid` parsing experimental via ParserOptions

  #1304 closed Jul 23, 2025

• CTE(common table expression) support for query

  #1326 closed Jul 16, 2025

• How about readOnly for sql query?

  #1308 closed Jul 16, 2025

• ForbiddenPatterns validation failed for `SELECT last_update FROM sakila.staff`

  #1307 closed Jul 15, 2025

19 Issues opened by 5 people

• Add documentation regarding reading Parquet files

  #1376 opened Aug 13, 2025

• `format { frameCol }` impossible

  #1375 opened Aug 11, 2025

• Support reading and writing GPX files

  #1372 opened Aug 10, 2025

• Default `readOnly = true` in `DbConnectionConfig` breaks SQLite

  #1365 opened Aug 5, 2025

• `FormattedFrame` in Kotlin Notebook does not render HTML

  #1354 opened Jul 29, 2025

• `row[columnAccessor]` is deprecated but commonly used in `perRowCol`

  #1353 opened Jul 29, 2025

• Read metadata from JDBC ResultSet.metaData instead of DatabaseMetaData (or allow both) in readSqlQuery()

  #1351 opened Jul 28, 2025

• Handle deprecation of kotlinx datetime `Instant` (and Clock)

  #1350 opened Jul 28, 2025

• IntelliJ plugin: "materialize compiler plugin DataFrame type" action

  #1348 opened Jul 25, 2025

• "generic interpretable" functions for compiler plugin

  #1347 opened Jul 25, 2025

• Add a Vertica support

  #1345 opened Jul 24, 2025

• Update chapter "Kotlin for Data Analysis" on the Kotlin site

  #1344 opened Jul 24, 2025

• Improve DataFrame Compiler Plugin

  #1343 opened Jul 24, 2025

• Improve JDBC integration: finalize API, type conversion and error handling

  #1342 opened Jul 24, 2025

• Release 1.0.0 version of Kotlin DataFrame library

  #1340 opened Jul 24, 2025

• Add "data schema generation" guide for KDF plugin

  #1338 opened Jul 22, 2025

• `convertTo` schema `fillWhenMissing` option

  #1337 opened Jul 22, 2025

• Bug: Cannot use columns with `RequiresOptIn` types in Notebook

  #1335 opened Jul 21, 2025

• Add a migration guide from SQL for backend Kotlin / Java developers

  #1329 opened Jul 17, 2025

34 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• Explore the possiblity to define schema and constunct object in Spring (DI framework) style

  #1321 commented on Jul 21, 2025 • 0 new comments

• Allow `DbType` to do type conversions

  #1266 commented on Jul 24, 2025 • 0 new comments

• Improve developer experience with Kotlin DataFrame documentation: new structure and user guides

  #1265 commented on Jul 24, 2025 • 0 new comments

• ColumnGroup.asDataFrame(), still gets rendered as ColumnGroup in notebook

  #1245 commented on Jul 29, 2025 • 0 new comments

• Include the up-to-date recommendation for LLM

  #1295 commented on Jul 30, 2025 • 0 new comments

• Document and test DataColumnArithmetics.kt

  #530 commented on Jul 30, 2025 • 0 new comments

• Improve SQLite experience

  #864 commented on Jul 30, 2025 • 0 new comments

• Kotlin Dataframe SQLite Integer cannot be cast to Boolean in Notebook

  #1013 commented on Jul 30, 2025 • 0 new comments

• Anroid java.lang.NoSuchMethodError: No interface method getSchema()Ljava/lang/String; in class Ljava/sql/Connection; or its super classes (declaration of 'java.sql.Connection' appears in /apex/com.android.art/javalib/core-oj.jar)

  #1014 commented on Jul 30, 2025 • 0 new comments

• Convert GitHub and IMDB notebooks back to the Gradle projects with Compiler Plugin support

  #883 commented on Jul 30, 2025 • 0 new comments

• Add a User Guide "How to handle large CSV?"

  #765 commented on Jul 30, 2025 • 0 new comments

• Column `hasNulls` property is actually isNullable

  #428 commented on Jul 30, 2025 • 0 new comments

• Add a migration guide from Pandas

  #1299 commented on Jul 30, 2025 • 0 new comments

• isOpenApiStr logger leaks to Gradle

  #785 commented on Jul 30, 2025 • 0 new comments

• `columnOf(arrayOf(1))` type inferred as `Array<*>`

  #679 commented on Jul 30, 2025 • 0 new comments

• Cannot call `.map {}` on `ColumnGroup`

  #890 commented on Jul 30, 2025 • 0 new comments

• Gradle plugin in multiplatform projects does not add KSP dependency

  #939 commented on Jul 30, 2025 • 0 new comments

• Add binary compatibility plugin info to contribution guide

  #941 commented on Jul 30, 2025 • 0 new comments

• Add official and reproducible benchmarks for the CSV readers

  #1003 commented on Jul 30, 2025 • 0 new comments

• Candidates for removal

  #1028 commented on Jul 30, 2025 • 0 new comments

• DataRow from Map creation API

  #1098 commented on Jul 30, 2025 • 0 new comments

• Notebooks fail with `T : Comparable<T & Any>?` notation

  #1116 commented on Jul 30, 2025 • 0 new comments

• Notebook with project dependencies can end up without loaded Jupyter integration

  #1140 commented on Jul 30, 2025 • 0 new comments

• Phase out usages of KProperties/Column Accessors in IDEA examples

  #1157 commented on Jul 30, 2025 • 0 new comments

• Phase out usages of KProperties/Column Accessors in example notebooks

  #1159 commented on Jul 30, 2025 • 0 new comments

• table name could not be available for Kotlin dataframe JDBC

  #1220 commented on Jul 30, 2025 • 0 new comments

• Add support for date/time types conversion in JDBC integration

  #461 commented on Jul 30, 2025 • 0 new comments

• Add support for converting JSON database types to ColumnGroup

  #462 commented on Jul 30, 2025 • 0 new comments

• Phase out usages of KProperties/Column Accessors in json, csv, arrow, excel, jdbc implementation and tests

  #1158 commented on Jul 30, 2025 • 0 new comments

• Integration with ktor-client

  #771 commented on Aug 1, 2025 • 0 new comments

• Inline some type aliases in public API

  #906 commented on Aug 11, 2025 • 0 new comments

• HTML formatting for a column affects columns in nested DataFrames with same name

  #982 commented on Aug 11, 2025 • 0 new comments

• Make SampleNotebooksTests not ignored and update Notebooks examples

  #474 commented on Aug 13, 2025 • 0 new comments

• Add Vertica DB support on dataframe-jdbc

  #604 commented on Jul 24, 2025 • 0 new comments