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ClickHouse® is a real-time analytics DBMS
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Azat Khuzhin 65572a23fe Fix async nature of reload in 01036_no_superfluous_dict_reload_on_create_database* 
Due to the async nature of SYSTEM RELOAD DICTIONARY/DICTIONARIES the
test can fail, if the reload will happen after the dictGet*():

    .862801 [ 36 ] {61df55ee-4a17-4bf3-8cfb-9478490393c3} <Debug> executeQuery: (from [::1]:37422) SYSTEM RELOAD DICTIONARY `foo 1234.dict`
    .863681 [ 36 ] {cd55d9f9-d176-4b19-bc97-d25575da2d15} <Debug> executeQuery: (from [::1]:37422) SELECT query_count FROM system.dictionaries WHERE (database = 'foo 1234') AND ...
    .863678 [ 54 ] {} <Debug> executeQuery: (internal) SELECT `key`, `val` FROM `foo 1234`.`dict_data`;

This is just a hotfix, long-term solution will be to make SYSTEM RELOAD
DICTIONARY syncronous (by adding another command or making already
existing).

Refs: #7916
2019-12-10 08:31:51 +03:00
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contrib Merge pull request #7956 from amosbird/hdfsabi 2019-12-02 12:57:55 +03:00
dbms Fix async nature of reload in 01036_no_superfluous_dict_reload_on_create_database* 2019-12-10 08:31:51 +03:00
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docs Update extended_roadmap.md 2019-12-05 05:17:46 +03:00
libs Replace SIGRTMIN with SIGTSTP 2019-12-02 20:29:19 +03:00
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website Update sitemap.xml 2019-12-02 12:23:43 +03:00
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README.md

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.

Useful Links

  • 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.
  • Blog contains various ClickHouse-related articles, as well as announces and reports about events.
  • 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.

Upcoming Events