Issues

• Missing Windows dynamic library for zstd

  area:generalbug
  ClickHouse/clickhouse-java#3339 · Filter by author davidpatel0 opened on Nov 11, 2026
  1

• [client-v2] Error body without X-ClickHouse-Exception-Code is cut short: only the first chunk is read, and short bodies are lost with response compression

  area:error-handlingbugclient-api-v2
  ClickHouse/clickhouse-java#3338 · Filter by author polyglotAI-bot opened on Nov 11, 2026

• [jdbc-v2] setURL / setBlob(Blob) / setClob(Clob) / setNClob / setSQLXML put the value into the SQL without quotes, so the statement fails

  area:data-typearea:jdbc-insertbugjdbc-v2
  ClickHouse/clickhouse-java#3337 · Filter by author polyglotAI-bot opened on Nov 11, 2026

• [client-v2] RowBinaryFormatWriter.setInputStream / setReader write the text "…$InputStreamHolder@…" instead of the stream data

  area:client-insertarea:jdbc-insertbugclient-api-v2jdbc-v2
  ClickHouse/clickhouse-java#3336 · Filter by author polyglotAI-bot opened on Nov 11, 2026
  1

• [jdbc-v2] RowBinary writer drops values set with setBytes, the stream setters and setURL (column gets NULL or its default)

  area:jdbc-insertbugjdbc-v2
  ClickHouse/clickhouse-java#3334 · Filter by author polyglotAI-bot opened on Nov 11, 2026

• [performance][jdbc] Reduce memory allocation in PreparedStatement

  jdbc-v2
  Task

  ClickHouse/clickhouse-java#3333 · Filter by author chernser opened on Nov 11, 2026 · 0.12.0

• [performance][jdbc] Insert operation when RowBinary not available

  jdbc-v2performance
  Task

  ClickHouse/clickhouse-java#3332 · Filter by author chernser opened on Nov 11, 2026 · 0.12.0

• [performance][memory] Investigate memory consumption

  client-api-v2jdbc-v2performance
  Task

  ClickHouse/clickhouse-java#3331 · Filter by author chernser opened on Nov 11, 2026 · 0.12.0

• [performance][benchmark] Insert

  client-api-v2performance
  Task

  ClickHouse/clickhouse-java#3330 · Filter by author chernser opened on Nov 11, 2026 · 0.12.0

• [performance][benchmark] Serial & Concurrent Select

  client-api-v2performance
  Task

  ClickHouse/clickhouse-java#3329 · Filter by author chernser opened on Nov 11, 2026 · 0.12.0

• [jdbc-v2] Make Insert with binary default for simple

  area:jdbc-insertjdbc-v2
  Task

  ClickHouse/clickhouse-java#3328 · Filter by author chernser opened on Nov 11, 2026 · 0.12.0
  2

• [client-v2] ACCESS_DENIED (HTTP 403) error text is lost with the default response compression: "<Unreadable error message> (transport error: 403)"

  area:error-handlingbugclient-api-v2jdbc-v2
  ClickHouse/clickhouse-java#3327 · Filter by author polyglotAI-bot opened on Nov 11, 2026

• [jdbc-v2] prepareStatement() throws unchecked ServerException/ClientException, not SQLException, when the RowBinary writer schema lookup fails

  bugjdbc-v2
  ClickHouse/clickhouse-java#3326 · Filter by author polyglotAI-bot opened on Nov 11, 2026

• [jdbc-v2] JDBC issues with functionality

  jdbc-v2
  Bug

  ClickHouse/clickhouse-java#3325 · Filter by author chernser opened on Nov 10, 2026 · 0.12.0

• [Epic][Performance] Client/JDBC V2 Performance 2027

  client-api-v2jdbc-v2performance
  Task

  ClickHouse/clickhouse-java#3324 · Filter by author chernser opened on Nov 10, 2026

• [Data-Types] Date/Time Values

  area:data-typeclient-api-v2
  Task

  ClickHouse/clickhouse-java#3323 · Filter by author chernser opened on Nov 10, 2026

• [client-v2] Add more tests for compression / make code more protective

  area:networkclient-api-v2enhancementjdbc-v2
  ClickHouse/clickhouse-java#3321 · Filter by author chernser opened on Nov 10, 2026 · 0.12.0

• [client-v2] Float NaN and Infinity are silently written into integer columns (NaN -> 0, Inf -> MAX_VALUE), also into Nullable(Int*)

  ClickHouse/clickhouse-java#3319 · Filter by author claude opened on Nov 10, 2026

• [client-v2] Enum8/Enum16 insert accepts a non-member integer and uses Enum.ordinal(), silently storing values that are not enum members

  ClickHouse/clickhouse-java#3304 · Filter by author claude opened on Nov 5, 2026
  1

• [Data Types] Wrapper (Array, Tuple, Map, Variant, etc. )

  area:data-type
  Task

  ClickHouse/clickhouse-java#3299 · Filter by author chernser opened on Nov 5, 2026

• [Data-Type] Integers

  area:data-typeclient-api-v2jdbc-v2
  Task

  ClickHouse/clickhouse-java#3298 · Filter by author chernser opened on Nov 5, 2026

• [logging] Review Logging

  area:generalclient-api-v2enhancementjdbc-v2
  Task

  ClickHouse/clickhouse-java#3295 · Filter by author chernser opened on Nov 4, 2026 · 0.12.0

• [jdbc-v2] setObject(ZonedDateTime) outside 1677-2262 silently stores a wrong DateTime64 value

  ClickHouse/clickhouse-java#3292 · Filter by author krvikash opened on Nov 4, 2026

• [client-v2] A Map/List/array bound to a Tuple query parameter is rendered as a Map/Array literal and fails with code 27

  ClickHouse/clickhouse-java#3291 · Filter by author claude opened on Nov 3, 2026

• [client-v2] Optimize RowBinaryFormatWriter by precompiling column serializers and reducing Object[] row-staging overhead

  v2-feedback
  ClickHouse/clickhouse-java#3289 · Filter by author Harry262530 opened on Nov 3, 2026
  2