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Problems.

Trouble with ClickHouse column

Databases4 posts from 3 people2d active+44 posts in the last 7 days, 0 the 7 days before (new)

Posts per day

Posts per day4 posts, Sep 21 to Sep 27

The posts behind it

4, newest first
PostDate
WITH FILL emits rows outside FROM..TO when STEP overflows the column type### Describe what's wrong - `FillingRow::next` accepts a step that wraps the carrier type instead of rejecting it as overflow - Trigger: a fill range whose end is within one `STEP` of the type's max, e.g. `Date` near 2148/2149 - Expected 2 rows within FROM..TO but got 16509 rows...ClickHouse/ClickHouseclickgapaiSep 225 days ago
`ALTER UPDATE/DELETE` on a column shadowing `_part`: NOT_FOUND_COLUMN_IN_BLOCK...`validate_mutation_query = 0` makes the identical statement work, so validation itself is broken. Root cause: `getAvailableColumnsWithVirtuals` appends every virtual name to the physical names without skipping ones already present, so `_part` appears twice in `available_columns`...ClickHouse/ClickHouseclickgapaiSep 225 days ago
Logical error: Sizes of nested column and null map of Nullable column are not equal after deserialization when reading a Wide part with a pending `MODIFY COLUMN Array(String) -> Array(Nullable(String))` of a `Nested` member (STID: 6726-6449)🕵 Stress test (`arm_msan`) aborted the server with a new logical error, STID 6726-6449: CI report: https://s3.amazonaws.com/clickhouse-test-reports/praktika.html?PR=118757&sha=373d38db5baef55043f8767bab8f582d324f5da3&name_0=PR&name_1=Stress%20test%20%28arm_msan%29 (core dump...ClickHouse/ClickHousealexey-milovidovSep 225 days ago
Analyzer: NOT_AN_AGGREGATE for alias column usage### Company or project name _No response_ ### Describe what's wrong NOT_AN_AGGREGATE exception when alias column is used ### Does it reproduce on the most recent release? Yes ### How to reproduce https://fiddle.clickhouse.com/12bcf9e7-e595-4e05-9c0a-cf171e050aa7 ### Expected...ClickHouse/ClickHousenovikdSep 216 days ago

Companies and products named

Company or productPosts naming it
ClickHouse4
GitHub2
About this problem

Evidence

4 posts from 3 people in 1 place, about 4 a week over 2 days. Mostly on ClickHouse/ClickHouse. Tools named alongside: GitHub.

Frustration Frustration 0 of 3· Seen on GitHub issues

How it was grouped

Posts about ClickHouse with no known issue, sharing the word "column". First post Sep 21, 2026, latest Sep 22, 2026. Corroborated: 3 or more posts from 2 or more people or places. Method

History

  • 2026-09-27 Added: Trouble with ClickHouse column (4 posts)

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