Problemsby GlyphTrouble with ClickHouse columns
3 posts from 2 people3d activeFading, +0 this week
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The posts behind it
INSERT SELECT from fileCluster/urlCluster fails to fill DEFAULT columns
### Describe what's wrong - INSERT INTO d SELECT * FROM fileCluster(...) or urlCluster(...) fails instead of inserting. - Triggered when the source files lack columns that have DEFAULT expressions on the destination table. - Expected the DEFAULT expressions to be filled in like...
Text index: exact hasPhrase on Array columns with a position increment gap
`hasPhrase` on a text index over an `Array` column runs in `HINT` mode: the index only pre-filters rows and the function rechecks them. Consider the following example: The query should return 1 (the second row); the third row matches only if a phrase may span elements. Query:...
minmax skip index wrongly prunes rows with NaN in Map columns
### Describe what's wrong - A minmax index on a `Map(..., Float64)` column drops matching rows instead of returning them. - Triggered by `SELECT count() FROM t WHERE m IN (map('a', nan))` with a minmax index on the Map column. - Expected count is 13 with `use_skip_indexes = 1`,...
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About this problem
Evidence
3 posts from 2 people in 1 place, about 1 a week over 41 days. Mostly on ClickHouse/ClickHouse. Tools named alongside: GitHub, Elasticsearch, Text, Gap.
Frustration Frustration 0 of 3· Seen on GitHub issues
How it was grouped
Posts about ClickHouse with no known issue, sharing the word "columns". First post Sep 22, 2026, latest Nov 1, 2026. Corroborated: 3 or more posts from 2 or more people or places. Method
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History