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Working with Materialized View tables in ClickHouse

Jim Hague Clickhouse Clickhouse Databases
There must be something about January which makes John prod me into a blog post about something I’ve just teased out. So here we are, it’s 2020, it’s January, and what is fast (OK, not so fast) becoming an annual tradition. Today’s post is a selection on snippets on Materialized Views. Materialized Views, if you haven’t met them, are tables automatically populated …
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Executable External Dictionaries in Clickhouse

Jim Hague Clickhouse Clickhouse Databases
External dictionaries, a dictionary populated by an external source, are a rather useful way to make data external to ClickHouse accessible when working in ClickHouse. One option for the source of the external data is an executable. I found, though, that the documentation doesn’t clearly tell you how to use this, so here I’m trying to rectify this. There are two basic types of executable external …