ClickHouse® is a real-time analytics DBMS
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Azat Khuzhin 808d1a0215 Reimplement preallocate for hashed/sparse_hashed dictionaries
It was initially implemented in #15454, but was reverted in #21948 (due
to higher memory usage).

This implementation differs from the initial, since now there is
separate attribute to enable preallocation, before it was done
automatically, but this has problems with duplicates in the source.

Plus this implementation does not uses dynamic_cast, instead it extends
IDictionarySource interface.
2021-05-10 07:41:48 +03:00
.github Update 40_bug-report.md 2021-04-28 06:53:00 +03:00
base Update glibc_compatibility check: ARCH_ARM -> ARCH_AARCH64 2021-05-08 14:24:04 +02:00
benchmark Convert to python3 (#15007) 2020-10-02 19:54:07 +03:00
cmake Merge pull request #23766 from kitaisreal/remove-unused-compilers 2021-05-01 16:15:38 +03:00
contrib Update to librdkafka 1.6.1 2021-05-04 10:05:12 +02:00
debian Revert "Revert "Merge branch 'master' into kuryatnikovm-DOCSUP-8022-prefer_column_name_to_alias"" 2021-04-26 02:36:27 +03:00
docker Merge branch 'master' into tests_dt64_ext 2021-05-08 23:29:18 +03:00
docs Reimplement preallocate for hashed/sparse_hashed dictionaries 2021-05-10 07:41:48 +03:00
programs Update config.xml 2021-05-08 03:43:06 +03:00
src Reimplement preallocate for hashed/sparse_hashed dictionaries 2021-05-10 07:41:48 +03:00
tests Reimplement preallocate for hashed/sparse_hashed dictionaries 2021-05-10 07:41:48 +03:00
utils Update version_date.tsv after release 21.3.9.83 2021-05-01 00:52:34 +03:00
website Revert "Revert "Merge branch 'master' into kuryatnikovm-DOCSUP-8022-prefer_column_name_to_alias"" 2021-04-26 02:36:27 +03:00
.arcignore Added .arcignore 2020-05-21 09:17:03 +03:00
.clang-format Fixed wrong code around Memory Profiler 2020-03-03 03:24:44 +03:00
.clang-tidy Enable clang-tidy for programs and utils 2020-05-18 04:19:50 +03:00
.editorconfig Changed tabs to spaces in editor configs and in style guide [#CLICKHOUSE-3]. 2017-04-01 11:35:09 +03:00
.gitattributes Union merge for arcadia_skip_list.txt to avoid frequent conflicts 2021-03-10 08:50:32 +03:00
.gitignore Ignore cmake-in-clickhouse 2021-04-28 18:10:12 +03:00
.gitmodules Revert "Revert "Merge branch 'master' into kuryatnikovm-DOCSUP-8022-prefer_column_name_to_alias"" 2021-04-26 02:36:27 +03:00
.potato.yml Fix yamllint issues 2021-02-20 23:25:21 +03:00
.pylintrc Add pylintrc config 2021-01-26 23:35:56 +03:00
.vimrc Changed tabs to spaces in editor configs and in style guide [#CLICKHOUSE-3]. 2017-04-01 11:35:09 +03:00
.yamllint Drop truthy.check-keys from yamllint (does not supported on CI) 2021-02-21 06:15:36 +03:00
AUTHORS Update AUTHORS 2020-01-23 17:36:05 +03:00
CHANGELOG.md Revert "Revert "Merge branch 'master' into kuryatnikovm-DOCSUP-8022-prefer_column_name_to_alias"" 2021-04-26 02:36:27 +03:00
CMakeLists.txt Don't try GLIBC_COMPATIBILITY for i686 Linux 2021-05-08 14:22:29 +02:00
CODE_OF_CONDUCT.md Add minimal code of conduct #9676 2020-03-16 12:44:28 +03:00
CONTRIBUTING.md Update CONTRIBUTING.md 2020-01-27 21:03:30 +03:00
docker-compose.yml Updated docker-compose.yml #1025 2017-07-26 20:05:32 +03:00
format_sources allow several <graphite> targets (#603) 2017-03-21 23:08:09 +04:00
LICENSE Update LICENSE 2021-01-25 17:00:13 +03:00
PreLoad.cmake Check if XCODE_IDE is true and avoid enforcing ninja in that case 2021-01-06 03:06:03 +04:00
README.md Update link 2021-03-22 18:29:19 +03:00
release Revert "Revert "Merge branch 'master' into kuryatnikovm-DOCSUP-8022-prefer_column_name_to_alias"" 2021-04-26 02:36:27 +03:00
SECURITY.md Update SECURITY.md (outdated long time ago) 2021-01-21 16:48:28 +03:00
uncrustify.cfg Better .clang-format and uncrustify.cfg 2018-11-29 15:45:34 +03:00
ya.make Changes required for auto-sync with Arcadia 2020-04-16 15:31:57 +03:00

ClickHouse — open source distributed column-oriented DBMS

ClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real time.

  • Official website has quick high-level overview of ClickHouse on main page.
  • Tutorial shows how to set up and query small ClickHouse cluster.
  • Documentation provides more in-depth information.
  • YouTube channel has a lot of content about ClickHouse in video format.
  • Slack and Telegram allow to chat with ClickHouse users in real-time.
  • Blog contains various ClickHouse-related articles, as well as announcements and reports about events.
  • Code Browser with syntax highlight and navigation.
  • Contacts can help to get your questions answered if there are any.
  • You can also fill this form to meet Yandex ClickHouse team in person.