duckdb/duckdb-java

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DuckDB JDBC Driver

Stars: 127
Forks: 80
Open beginner issues: 1
Indexed issues: 56
Avg merge: 13h 49m
Merged PRs (30d): 48

Dominant language: C++
License: MIT
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 15, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

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56 open issues indexed

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

Difficulty 4/5 3-5 days Newbie friendliness 48/100

duckdb/duckdb-java#871 · 4 comments · Opened Sep 13, 2026
Native SIGSEGV in DuckDB JDBC when repeatedly executing a split query with scalar subqueries and LIMIT 0 Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

duckdb/duckdb-java#872 · Opened Sep 11, 2026
Evaluate to create native jars and plain java jar as primary deployment model Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

duckdb/duckdb-java#837 · Opened Aug 24, 2026
Better documentation for DuckLake usage? Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

duckdb/duckdb-java#832 · 2 comments · Opened Aug 24, 2026
executeBatch()` on a prepared INSERT runs s are ~1–2 orders of magnitude slower than the Appender Open

Difficulty 5/5 Over a week Newbie friendliness 42/100

duckdb/duckdb-java#815 · 1 comment · Opened Aug 15, 2026
Support virtual columns in Java table functions, including empty projection for COUNT(*) Open

capi_v2

Difficulty 5/5 Over a week Newbie friendliness 35/100

duckdb/duckdb-java#806 · 1 comment · Opened Aug 13, 2026
Optimizer incorrectly rewrites window plans involving arrow scan inputs to self-joins with multiple refs to the scan Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

duckdb/duckdb-java#713 · Opened Jun 16, 2026
Failure to auto load httpfs extension after upgrading to 1.5.* Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

duckdb/duckdb-java#679 · 2 comments · Opened May 5, 2026
[Appender] Add support for VARIANT Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

duckdb/duckdb-java#643 · 2 comments · Opened Apr 11, 2026
DBeaver does not show indexes Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

duckdb/duckdb-java#640 · Opened Apr 9, 2026
`CALL start_ui_server()` triggers extension download in DuckDB 1.5.0 Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

duckdb/duckdb-java#623 · 3 comments · Opened Mar 26, 2026
Running driver on not officially supported platforms Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

duckdb/duckdb-java#605 · 3 comments · Opened Mar 17, 2026
Loading extensions conflicts with JVM in debug mode Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

duckdb/duckdb-java#593 · 10 comments · Opened Mar 6, 2026
Interval fields returned as `String` Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

duckdb/duckdb-java#580 · 2 comments · Opened Feb 26, 2026
TIMESTAMP_NS nanoseconds are truncated Open

Difficulty 3/5 1-2 days Newbie friendliness 40/100

duckdb/duckdb-java#571 · 1 comment · Opened Feb 20, 2026
Optimizer extensions do not have access to query Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

duckdb/duckdb-java#549 · 3 comments · Opened Jan 29, 2026
Query timeout when going through HTTP Proxy since 1.4.4 Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

duckdb/duckdb-java#548 · 8 comments · Opened Jan 29, 2026
Wrong WKB produced by jdbc driver when reading geometry type Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

duckdb/duckdb-java#486 · 7 comments · Opened Dec 15, 2025
Some values can not be stored into a column of type "Timestamp With Timezone". They will be changed Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

duckdb/duckdb-java#483 · 3 comments · Opened Dec 13, 2025
NoSuchMethodError: Lorg/duckdb/user/DuckDBMap;.getSQLTypeName()Ljava/lang/String Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

duckdb/duckdb-java#478 · 1 comment · Opened Dec 10, 2025
DateTimeException: Invalid value for NanoOfDay raised when running test_all_types() Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

duckdb/duckdb-java#448 · 1 comment · Opened Nov 7, 2025
DuckDB adds Ducklake and Postgres. Cannot generate parquet after a while Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

duckdb/duckdb-java#423 · 12 comments · Opened Oct 15, 2025
Using the global `TimeZone` config in the `Properties` object passed to `DriverManager.getConnection` fails with error: "The following options were not recognized: TimeZone" Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

duckdb/duckdb-java#417 · 5 comments · Opened Oct 9, 2025
No predicate / filter pushdown when querying arrow streams Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

duckdb/duckdb-java#392 · Opened Sep 18, 2025
Unable to load DuckDB native library in Metabase Docker Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

duckdb/duckdb-java#391 · 3 comments · Opened Sep 17, 2025
FATAL Error: Database invalidated. Failed to create checkpoint as .wal file does not exist Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

duckdb/duckdb-java#331 · 5 comments · Opened Aug 7, 2025
Attaching DB via URL on Windows leads to "Cannot open file" error Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

duckdb/duckdb-java#308 · 2 comments · Opened Jul 12, 2025
Fatal error Attempted to dereference unique_ptr that is NULL! Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

duckdb/duckdb-java#299 · 2 comments · Opened Jul 6, 2025
duckdb read_xlsx new line Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

duckdb/duckdb-java#297 · 1 comment · Opened Jul 4, 2025
Future proof duckdb-java by making it a named module. Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

duckdb/duckdb-java#296 · 3 comments · 2 reactions · Opened Jun 30, 2025
Error when appending to DuckLake table Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

duckdb/duckdb-java#249 · 7 comments · Opened Jun 3, 2025
Doc issue? What is the proper way of using JDBC PreparedStatement with STRUCT and/or MAP? Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

duckdb/duckdb-java#208 · 2 comments · Opened May 2, 2025
FATAL Error: Failed to create checkpoint because of error... Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

duckdb/duckdb-java#206 · 18 comments · Opened May 1, 2025
Timestamp handling is broken for BCE dates Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

duckdb/duckdb-java#200 · Opened Apr 18, 2025
Invalid bitpacking mode Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

duckdb/duckdb-java#186 · 4 comments · Opened Apr 7, 2025
SQLException:INTERNAL Error: Invalid bitpacking mode Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

duckdb/duckdb-java#158 · Opened Mar 11, 2025
Could not write temp file and throw Invalid argument during BIG table sort Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

duckdb/duckdb-java#156 · Opened Mar 8, 2025
Reading CSV file in DBBeaver dropping characters Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

duckdb/duckdb-java#155 · Opened Mar 7, 2025
DuckDB JDBC 1.2.0 in DBeaver 25.0.0 cannot connect to db file due to permission errors Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

duckdb/duckdb-java#154 · 6 comments · Opened Mar 3, 2025
Partitioned Export with COPY Generates Excessively Many Small Files within Each Partition Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

duckdb/duckdb-java#152 · 1 comment · 1 reaction · Opened Feb 27, 2025
Performance Inquiry on Java Multithreaded Concurrent Queries via JDBC Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

duckdb/duckdb-java#142 · 3 comments · Opened Feb 20, 2025
Snapshot artifacts have weird numbering scheme making them hard to depend on Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

duckdb/duckdb-java#134 · Opened Jan 23, 2025
MAX() inside PIVOT yielding crazy results for value from window function Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

duckdb/duckdb-java#128 · 1 comment · Opened Jan 15, 2025
Split MacOS binaries into amd64 and x64 versions to allow each to be shipped separately (feature request) Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

duckdb/duckdb-java#125 · Opened Jan 13, 2025
prepared statement Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

duckdb/duckdb-java#124 · 1 reaction · Opened Jan 12, 2025
DuckDBDatabaseMetaData.java.getTypeInfo() Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

duckdb/duckdb-java#119 · Opened Jan 6, 2025
Can't load library libduckdb_java.so_windows_arm64 Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

duckdb/duckdb-java#117 · 3 comments · 2 reactions · Opened Dec 31, 2024
DuckDBConnection.prepareStatement methods could be less strict Open

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

duckdb/duckdb-java#82 · 3 reactions · Opened Sep 13, 2024
Connection#createArrayOf performance worse than passing in array literals Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

duckdb/duckdb-java#68 · 1 comment · Opened Aug 23, 2024
use java api attach pg，then copy parquet data to pg,30W data,java api cost 240s but use linux duckdb,just cost 5s Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

duckdb/duckdb-java#58 · Opened Jul 16, 2024

duckdb/duckdb-java

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