Problemsby GlyphTrouble with ClickHouse server
3 posts from 3 people2d activeFading, +0 this week
Posts per day
The posts behind it
`DROP NAMED COLLECTION` succeeds while a database uses the collection, and the server then fails to start
### Describe what's wrong Since https://github.com/ClickHouse/ClickHouse/issues/77366, `DROP NAMED COLLECTION` refuses to drop a collection that a table uses (`NAMED_COLLECTION_IS_USED`): a table registers itself as a dependent of its collection...
TTL DELETE WHERE ignores session_timezone: DateTime string literal evaluated in server timezone, wrong rows silently deleted while the identical mutation predicate is rewritten
### Describe what's wrong **TL;DR:** With `session_timezone` set, a `TTL ... DELETE WHERE` condition that compares a `DateTime` column with a bare string literal silently deletes the wrong rows: the literal is persisted verbatim in the table metadata and evaluated by background...
Hashing a deeply nested `Dynamic`/`JSON` value crashes the server with SIGSEGV
### Describe what's wrong - `sipHash64`, `cityHash64`, `xxHash64` and `murmurHash3_64` over a deeply nested `Dynamic`/`JSON` value exhaust the stack and crash the server. - Trigger: hash a `Dynamic` value with thousands of nested `Object` levels, e.g. built via...
Companies and products named
About this problem
Evidence
3 posts from 3 people in 1 place, about 2 a week over 9 days. Mostly on ClickHouse/ClickHouse. Tools named alongside: GitHub, PostgreSQL, MySQL, Docker.
Frustration Frustration 0 of 3· Seen on GitHub issues
How it was grouped
Posts about ClickHouse with no known issue, sharing the word "server". First post Oct 5, 2026, latest Oct 13, 2026. Corroborated: 3 or more posts from 2 or more people or places. Method
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History