# Finding and fixing bugs in ClickHouse®'s Alias table engine

DevFeed: [Finding and fixing bugs in ClickHouse®'s Alias table engine](<https://devfeed.tech/articles/finding-and-fixing-bugs-in-clickhouse-s-alias-table-engine-18497.md>)

Original publisher: [Read original article](<https://www.tinybird.co/blog/fixing-clickhouse-alias-dependency-bug>)

Author: Enric Calabuig

Published: 2026-04-13T00:00:00Z

Content type: article

Language: en

Sources: [Tinybird](<https://devfeed.tech/sources/tinybird.md>)

Topics: [clickhouse](<https://devfeed.tech/topics/clickhouse.md>), [Testing](<https://devfeed.tech/topics/testing.md>)

Tags: [bugs](<https://devfeed.tech/tags/bugs.md>), [clickhouse](<https://devfeed.tech/tags/clickhouse.md>), [engineering-excellence](<https://devfeed.tech/tags/engineering-excellence.md>), [experimental](<https://devfeed.tech/tags/experimental.md>), [testing](<https://devfeed.tech/tags/testing.md>)

## AI overview

The article reports testing ClickHouse's experimental Alias table engine, identifies bugs in DDL dependency tracking and materialized-view triggering, and notes that a fix for the dependency-tracking bug was submitted upstream.

## Source excerpt

We've been testing ClickHouse®'s experimental Alias table engine. We found bugs in how DDL dependencies are tracked and in how materialized views are triggered and shipped a fix upstream for the former.