Issues

• BUG: org.h2.jdbc.JdbcSQLNonTransientException: Unknown data type: "INET"

  h2database/h2database#4425 · Filter by author BowlBird opened on Sep 29, 2026
  1

• BUG: Parenthesized UNION term returns stale result when only its FETCH / OFFSET / ORDER BY parameter changes

  h2database/h2database#4421 · Filter by author NikitaIT opened on Sep 28, 2026

• MSSQLServer mode handles target-table hints inconsistently in DELETE and MERGE

  h2database/h2database#4408 · Filter by author Wwwing301 opened on Sep 20, 2026

• Table name missing in JdbcSQLTimeoutException

  h2database/h2database#4388 · Filter by author wielantu opened on Sep 7, 2026
  7

  

• 2.5.250: "Double mark" corruption on reopen after SHUTDOWN, and 1.6x-5.5x larger files than 2.4.240 under mixed insert/delete load

  h2database/h2database#4387 · Filter by author theotherp opened on Sep 6, 2026
  21

  

• org.h2.mvstore.MVStoreException: Chunk * not found

  h2database/h2database#4383 · Filter by author kennethjor opened on Sep 1, 2026
  8

• MODE=Oracle: LIKE ... ESCAPE '' never matches (empty-string escape disables LIKE entirely)

  h2database/h2database#4367 · Filter by author lennartvk opened on Jul 24, 2026
  1

• QUALIFY in CTE or VIEW ignored when queried with WHERE

  h2database/h2database#4366 · Filter by author thuri opened on Jul 23, 2026
  3

• Unnecessary WHERE condition evaluation leading to error

  h2database/h2database#4364 · Filter by author beikov opened on Jul 15, 2026
  1

• potential data race on the key array in Page

  h2database/h2database#4361 · Filter by author dracestudy opened on Jul 10, 2026
  1

• H2 database Upgrade utility fails for recent 2.* versions

  h2database/h2database#4354 · Filter by author jrohbock opened on Jun 26, 2026
  1

• MySQL compatibility mode does not accept MySQL-style DATEDIFF(end, start) two-argument signature

  h2database/h2database#4351 · Filter by author donglianghan opened on Jun 9, 2026
  1

• CREATE TEMPORARY TABLE AS SELECT incorrectly drops the only NULL row

  h2database/h2database#4349 · Filter by author AnotherYx opened on Jun 6, 2026

• Scope propagation to sub-subqueries

  h2database/h2database#4339 · Filter by author mikclrk-21cs opened on Apr 7, 2026
  1

• Regression from 2.1.212 to 2.1.214.

  h2database/h2database#4337 · Filter by author sageserpent-open opened on Mar 31, 2026
  5

• [Bug]: Severe ClassLoader Pinning & Metaspace OOM via META_LOCK_DEBUGGING ThreadLocals

  h2database/h2database#4333 · Filter by author QiuYucheng2003 opened on Mar 2, 2026
  1

• org.h2.jdbc.JdbcSQLDataException: Data conversion error converting "CHARACTER VARYING to JAVA_OBJECT" [22018-224]

  h2database/h2database#4328 · Filter by author itumairsayed opened on Feb 12, 2026
  1

• JSON array constructor by query cannot handle set operations in argument queries

  h2database/h2database#4325 · Filter by author lukaseder opened on Feb 4, 2026

• ALTER TABLE ADD with long column name removes similar column after disconnect

  h2database/h2database#4324 · Filter by author cbbravo opened on Feb 3, 2026

• new row not visible with insertRow on updatable/scrollable resultset

  h2database/h2database#4319 · Filter by author optyfr opened on Jan 22, 2026

• deeply nested where-in query hangs (cycles) indefinitely after upgrading to 2.4.240

  h2database/h2database#4318 · Filter by author Incanus3 opened on Jan 22, 2026
  22

• [H2 database] The database has been closed [90098-232]

  h2database/h2database#4316 · Filter by author ashang-redhat opened on Jan 7, 2026
  7

• How can I recovery the H2 database and why got this exception?

  h2database/h2database#4315 · Filter by author Glenrodrigues opened on Jan 5, 2026

• Upper case at login form for choose language

  h2database/h2database#4295 · Filter by author Veneckiy opened on Oct 14, 2025

• Data Races org.h2.jdbc.JdbcConnection

  h2database/h2database#4289 · Filter by author ThomasKrieger opened on Sep 29, 2025
  7