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[Client, JDBC] Migration Guide

enhancement

Status: Open.

Feature

#2640 In ClickHouse/clickhouse-java;

· chernser opened on Nov 4, 2025

JDBC does not recognize CH errors in the middle of a result

area:networknetwork and IO related issuesnetwork and IO related issues

blocked-by-clickhouse

bug

jdbc-v1JDBC driverJDBC driver

Status: Open.

#650 In ClickHouse/clickhouse-java;

· den-crane opened on May 5, 2021

Slow deserialization of DateTime values

area:data-typedata type processing issuesdata type processing issues

performance

test

Status: Open.

#715 In ClickHouse/clickhouse-java;

· zhicwu opened on Sep 7, 2021

Timestamp read from database is treated as if it was in JVM timezone

area:data-typedata type processing issuesdata type processing issues

bug

jdbc-v2jdbc-v2 issuesjdbc-v2 issues

Status: Open.

#1048 In ClickHouse/clickhouse-java;

· piotrp opened on Aug 20, 2022

problem with dates + timezones

area:data-typedata type processing issuesdata type processing issues

jdbc-v2jdbc-v2 issuesjdbc-v2 issues

question

Status: Open.

#1117 In ClickHouse/clickhouse-java;

· mtselishchev opened on Oct 27, 2022

Support Convert java.util.Date

action:verify

area:data-typedata type processing issuesdata type processing issues

client-api-v2

jdbc-v1JDBC driverJDBC driver

module-clientClient API and all implementationsClient API and all implementations

Status: Open.

#1220 In ClickHouse/clickhouse-java;

· yanye666 opened on Feb 2, 2023

New clickhouse driver is using a different impl of PreparedStatement

action:verify

area:data-typedata type processing issuesdata type processing issues

bug

jdbc-v1JDBC driverJDBC driver

Status: Open.

#1270 In ClickHouse/clickhouse-java;

· malikas05 opened on Mar 7, 2023

ParsingException during insert for negative (before 1970-01-01) values into DateTime

action:verify

area:data-typedata type processing issuesdata type processing issues

area:sql-parser

bug

investigatingInvestigation of a root cause is on goingInvestigation of a root cause is on going

Status: Open.

#1448 In ClickHouse/clickhouse-java;

· TimonSP opened on Sep 14, 2023

IllegalArgumentException caused by local default datetime when using nullAsDefault property

area:data-typedata type processing issuesdata type processing issues

area:docsDocumentation missingDocumentation missing

bug

client-api-v2

jdbc-v2jdbc-v2 issuesjdbc-v2 issues

Status: Open.

#1735 In ClickHouse/clickhouse-java;

· yanye666 opened on Jul 16, 2024

[client-v2] JSON Support

area:docsDocumentation missingDocumentation missing

client-api-v2

Status: Open.

#1833 In ClickHouse/clickhouse-java;

· chernser opened on Sep 25, 2024

[client-v2] Add support of working with large strings

client-api-v2

enhancement

jdbc-v2jdbc-v2 issuesjdbc-v2 issues

Status: Open.

#2263 In ClickHouse/clickhouse-java;

· Paultagoras opened on Apr 1, 2025

[client-v2] Support self-signed certificates

client-api-v2

enhancement

Status: Open.

#2309 In ClickHouse/clickhouse-java;

· chernser opened on Apr 15, 2025

Query parameters can't be sent through POST body

client-api-v2

enhancement

Status: Open.

#2324 In ClickHouse/clickhouse-java;

· jcubells opened on Apr 22, 2025

[client-v2] Support changing path name in the URL

client-api-v2

enhancement

Status: Open.

Feature

#2344 In ClickHouse/clickhouse-java;

· chernser opened on May 1, 2025

[client-v2] Support returning raw http header

area:generalgeneral issue without a specific area.general issue without a specific area.

client-api-v2

enhancement

Status: Open.

#2347 In ClickHouse/clickhouse-java;

· chernser opened on May 1, 2025

[client-v2] Client does not honor sslMode=none

area:networknetwork and IO related issuesnetwork and IO related issues

bug

client-api-v2

Status: Open.

#2389 In ClickHouse/clickhouse-java;

· dpsutton opened on May 26, 2025

[jdbc-v2] DatabaseMetadata fails if server has a new type

area:jdbc-metadataissue handling metadata things like getting type of columnissue handling metadata things like getting type of column

bug

jdbc-v2jdbc-v2 issuesjdbc-v2 issues

Status: Open.

#2394 In ClickHouse/clickhouse-java;

· chernser opened on May 28, 2025

[JDBC, Client] DateTime logic should be in the client

area:generalgeneral issue without a specific area.general issue without a specific area.

bug

client-api-v2

jdbc-v2jdbc-v2 issuesjdbc-v2 issues

Status: Open.

#2416 In ClickHouse/clickhouse-java;

· chernser opened on Jun 4, 2025

Java client-v2 server settings does not work for wait_for_async_insert

bug

client-api-v2

investigatingInvestigation of a root cause is on goingInvestigation of a root cause is on going

question

Status: Open.

#2510 In ClickHouse/clickhouse-java;

· aadhikary opened on Jul 29, 2025

Major performance regression in client-v2

client-api-v2

performance

v2-feedback

Status: Open.

#2516 In ClickHouse/clickhouse-java;

· alekkol opened on Jul 31, 2025

getBlob implementation

area:jdbc-readreading data with jdbcreading data with jdbc

enhancement

jdbc-v2jdbc-v2 issuesjdbc-v2 issues

Status: Open.

#2558 In ClickHouse/clickhouse-java;

· AndrewRazumovskiy opened on Sep 2, 2025

[JDBC-V2] Review Metabase test failures

area:generalgeneral issue without a specific area.general issue without a specific area.

bug

jdbc-v2jdbc-v2 issuesjdbc-v2 issues

Status: Open.

#2567 In ClickHouse/clickhouse-java;

· chernser opened on Sep 9, 2025

[V2] Support USE_BINARY_STRING in ClickHouse V2 client

client-api-v2

v2-feedback

Status: Open.

#2608 In ClickHouse/clickhouse-java;

· krvikash opened on Oct 6, 2025

[client, jdbc] Auto-generate Query ID if absent

enhancement

Status: Open.

#2642 In ClickHouse/clickhouse-java;

· chernser opened on Nov 4, 2025

[client-v2] Notify user about unknown configuration parameters

bug

Status: Open.

#2658 In ClickHouse/clickhouse-java;

· chernser opened on Nov 17, 2025