ClickHouse/clickhouse-java v0.6.5

Release v0.6.5

on GitHub

Deprecations

• Following components will be deprecated and removed in 0.7.0 release:
  • clickhouse-cli-client
  • clickhouse-grpc-client
• Projects cli-client and grpc-client are excluded from release and build.
• No more builds for non-lts Java versions - no more Java 9 release builds.

Performance Improvements

• [client-v2] queryAll() optimized to use less memory (#1779)
• [client-v2] Client.Builder#setClientNetworkBufferSize introduced to allow increasing a buffer that is used
  to transfer data from socket buffer to application memory. When set to >= of send/receive socket buffer size it
  significantly reduces number of system calls and improves performance. (#1784)

New Features

• [client-v2] Client will retry on NoHttpResponseException when using Apache HTTP client.
  It is useful when close/stale connection is leased from connection pool. No client will
  retry one more time instead of failing. Client.Builder#retryOnFailures and Client.Builder#setMaxRetries were
  introduced to configure client behavior. (#1768)

Bug Fixes

• [client-v2] Correct timezone used when reading DateTime values. Affects how date/datetime values
  are read when session_timezone is used (#1780)
• [client-v2] Fix reading big integers. Previously was causing incorrect values
  (#1786)
  (#1776)
• [client-v2] Fix server compressions when using a client instance concurrently
  (#1791)
• [client-v2] Fix reading arrays as list. Also affected reading nested arrays (#1800)
• [client-v1] Fix handling summary metadata for write operations. Previously was causing empty metadata