Altinity Blog

ClickHouse Meetup in Paris Recap



October for us started strong with a successful ClickHouse meetup in Paris. The purpose of the event was to talk about ClickHouse, an open-source column-store analytics DBMS – its features, roadmap, use cases, meet local ClickHouse users, hear talks from ClickHouse lead developer Alexey Milovidov, Altinity CTO Alexander Zaitsev and Paris ClickHouse users.

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Updates and Deletes in ClickHouse

Oct 16, 2018

It’s been two years already ago when ClickHouse development team published an excellent blog post “How to update data in ClickHouse”. In that old times ClickHouse supported only monthly partitions, and for mutable data structures, they suggested to use pretty exotic data structures. We were all waiting for a more convenient approach, and finally, it is there: ClickHouse now supports updates in deletes! In this article, we will see how it works.

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ClickHouse HTTP protocol advanced features


ClickHouse HTTP protocol is good and reliable, it is a base for official JDBC, ODBC and many 3rd party drivers and integrations. It can also be used directly with http client libraries. In this article we describe two advanced features of HTTP protocol: execution progress and sessions.

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