Issues

• JDBC: ResultSet.getObject(int, java.util.Map.class) fails for MAP column

  duckdb/duckdb-java#901 · Filter by author ventod opened on Oct 8, 2026

• JDBC: ResultSet.getObject(int, java.sql.Struct.class) fails for STRUCT column

  duckdb/duckdb-java#900 · Filter by author ventod opened on Oct 8, 2026

• JDBC: ResultSet.getObject(int, java.time.OffsetTime.class) fails for TIME_WITH_TIME_ZONE column

  duckdb/duckdb-java#899 · Filter by author ventod opened on Oct 8, 2026
  1

• Native SIGSEGV in DuckDB JDBC when repeatedly executing queries with window functions and LIMIT 0

  duckdb/duckdb-java#871 · Filter by author Annie191 opened on Sep 13, 2026
  4

• Native SIGSEGV in DuckDB JDBC when repeatedly executing a split query with scalar subqueries and LIMIT 0

  duckdb/duckdb-java#872 · Filter by author Annie191 opened on Sep 11, 2026

• Evaluate to create native jars and plain java jar as primary deployment model

  duckdb/duckdb-java#837 · Filter by author rmannibucau opened on Aug 24, 2026

• Better documentation for DuckLake usage?

  duckdb/duckdb-java#832 · Filter by author guizmaii opened on Aug 24, 2026
  2

• executeBatch()` on a prepared INSERT runs s are ~1–2 orders of magnitude slower than the Appender

  duckdb/duckdb-java#815 · Filter by author stbischof opened on Aug 15, 2026
  1

• Support virtual columns in Java table functions, including empty projection for COUNT(*)

  capi_v2
  duckdb/duckdb-java#806 · Filter by author lfkpoa opened on Aug 13, 2026
  1

• Optimizer incorrectly rewrites window plans involving arrow scan inputs to self-joins with multiple refs to the scan

  duckdb/duckdb-java#713 · Filter by author randalloveson opened on Jun 16, 2026

• Failure to auto load httpfs extension after upgrading to 1.5.*

  duckdb/duckdb-java#679 · Filter by author filipe-amberflo-io opened on May 5, 2026
  2

• [Appender] Add support for VARIANT

  duckdb/duckdb-java#643 · Filter by author rayokota opened on Apr 11, 2026
  2

• DBeaver does not show indexes

  duckdb/duckdb-java#640 · Filter by author nRoger-Env opened on Apr 9, 2026

• CALL start_ui_server() triggers extension download in DuckDB 1.5.0

  duckdb/duckdb-java#623 · Filter by author sanjukeshavan opened on Mar 26, 2026
  3

• Running driver on not officially supported platforms

  duckdb/duckdb-java#605 · Filter by author DNikolaevAtRocket opened on Mar 17, 2026
  3

• Loading extensions conflicts with JVM in debug mode

  duckdb/duckdb-java#593 · Filter by author juja0 opened on Mar 6, 2026
  10

• Interval fields returned as String

  duckdb/duckdb-java#580 · Filter by author raszi opened on Feb 26, 2026
  2

• TIMESTAMP_NS nanoseconds are truncated

  duckdb/duckdb-java#571 · Filter by author kostya-sh opened on Feb 20, 2026
  1

• Optimizer extensions do not have access to query

  duckdb/duckdb-java#549 · Filter by author Miosp opened on Jan 29, 2026
  3

• Query timeout when going through HTTP Proxy since 1.4.4

  duckdb/duckdb-java#548 · Filter by author eledhwen opened on Jan 29, 2026
  8

• Wrong WKB produced by jdbc driver when reading geometry type

  duckdb/duckdb-java#486 · Filter by author lukaseder opened on Dec 15, 2025
  7

• Some values can not be stored into a column of type "Timestamp With Timezone". They will be changed

  duckdb/duckdb-java#483 · Filter by author blo-kisters-de opened on Dec 13, 2025
  3

• NoSuchMethodError: Lorg/duckdb/user/DuckDBMap;.getSQLTypeName()Ljava/lang/String

  duckdb/duckdb-java#478 · Filter by author jasper-aurora opened on Dec 10, 2025
  1

• DateTimeException: Invalid value for NanoOfDay raised when running test_all_types()

  duckdb/duckdb-java#448 · Filter by author evan-duncan opened on Nov 7, 2025
  1

• DuckDB adds Ducklake and Postgres. Cannot generate parquet after a while

  duckdb/duckdb-java#423 · Filter by author DSir-eden opened on Oct 15, 2025
  12