Data and AI struggles

1,730 problems · 342 companies

Databases

Trouble with ClickHouse drop

1 post from 1 person1d activeFading, +0 this weekunverified

Posts per day

Posts per day1 posts, Oct 12 to Nov 9

The posts behind it

GitHub issuesClickHouse/ClickHouse · clickgapaiNov 1

JSONExtract*/JSONHas drop a leading empty key for native JSON arguments

### Describe what's wrong - On native `JSON` input, a leading `''` key in `JSONExtract*`/`JSONHas` gets dropped from the path. - Trigger: calling `JSONExtractInt(j, '', 'a')` or `JSONHas(j, '', 'a')` where `j` is a native `JSON` column. - Expected: match `String` overload and...

Companies and products named

1 post
About this problem

Evidence

1 post from 1 person in 1 place. 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 "drop". First post Nov 1, 2026, latest Nov 1, 2026. Unverified: fewer than 3 posts, or one person or place only. Method

Other ClickHouse problems

ClickHouse upgrades break working setups

31 posts from 20 people on GitHub issues.

ClickHouse users keep filing bugs

Top post: "Tighten seccomp policy for optional kernel interfaces", one of 19 posts from 8 people on GitHub issues.

Trouble with ClickHouse column

Top post: "MaterializedPostgreSQL: reading a Nullable column's .null subcolumn (x IS NULL, count(x)) fails with", one of 15 posts from 9 people on GitHub issues.

ClickHouse costs outgrow the value it gives

11 posts from 3 people on GitHub issues.

Trouble with ClickHouse table

Top post: "`SYSTEM RESTORE REPLICA` on a second replica over-bumps the table `metadata` znode version; every later", one of 8 posts from 5 people on GitHub issues.

Experiments on ClickHouse are hard to reproduce and track

8 posts from 1 person on GitHub issues. Unverified.

Trouble with ClickHouse tables

Top post: "Paimon: resolve columns by field id, so tables with renamed or re-added columns are readable", one of 7 posts from 6 people on GitHub issues.

Trouble with ClickHouse join

Top post: "Explicit grace_hash now spills at max_bytes_ratio_before_external_join = 0.5 although the build side fits in", one of 5 posts from 4 people on GitHub issues.

ClickHouse error messages are cryptic

5 posts from 3 people on GitHub issues.

Trouble with ClickHouse read

Top post: "ORC: a corrupt PostScript `metadata_length` makes ORC predicate pushdown read `stripe_stats` out of bounds,", one of 4 posts from 4 people on GitHub issues.

Trouble with ClickHouse database

Top post: "`DROP NAMED COLLECTION` succeeds while a database uses the collection, and the server then fails to start", one of 4 posts from 2 people on GitHub issues.

Trouble with ClickHouse query

Top post: "Memory tracker counts jemalloc's freed pages as used, so a heavy query started right after another spills to", one of 4 posts from 3 people on GitHub issues.

History

Momentum went from new to fading.

Nov 8, 2026

Momentum went from fading to new.

Nov 6, 2026

First seen with 1 post; the top post now: "JSONExtract*/JSONHas drop a leading empty key for native JSON arguments".

Oct 28, 2026