Experiments on DuckDB are hard to reproduce and track

MLOps2 posts from 2 people2d active+00 posts in the last 7 days, 1 the 7 days before (fading)Unverified

Posts per day2 posts, Oct 3 to Oct 21

The posts behind it

2, newest first

GitHub issuesOct 9 Silent parquet stat corruption bug### What happens? `count < null_count` ### To Reproduce Run above ### OS: macOS ### DuckDB Version: DuckDB v1.5.6 (Variegata) 069cc9f9b5 ### DuckDB Client: cli ### Hardware: _No response_ ### Full Name: Joe Isaacs ### Affiliation: SpiralDB ### Did you include all relevant...duckdb/duckdb · joseph-isaacs2 repliesOpen ↗GitHub issuesOct 3 Wrong result: common_subplan returns one column's sum for two scalar subqueries over the same filtered view### What happens? Two scalar subqueries over the same view, each summing a *different* column under the *same* `WHERE`, return the first column's sum for both. It's a silent wrong answer, with no error. `EXPLAIN` shows the shared part placed in `__common_subplan_1`. That CTE...duckdb/duckdb · wtremml18Open ↗

Companies and products named

Named2 posts

DuckDB Named1 post

PyPI

About this problem

Evidence

2 posts from 2 people in 1 place, about 2 a week over 7 days. Mostly on duckdb/duckdb. Tools named alongside: PyPI.

Frustration Frustration 0 of 3· Seen on GitHub issues

How it was grouped

Posts that state a pain and match the "ml-reproducibility" rule about DuckDB. First post Oct 3, 2026, latest Oct 9, 2026. Unverified: fewer than 3 posts, or one person or place only. Method

The same problem elsewhere

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Other DuckDB problems

Same product15 postsDuckDB upgrades break working setups Same product14 postsDuckDB users keep filing bugs Same product9 postsTrouble with DuckDB column Same product8 postsTrouble with DuckDB overflow Same product6 postsDuckDB error messages are cryptic Same product6 postsTrouble with DuckDB internal Same product5 postsTrouble with DuckDB null Same product5 postsTrouble with DuckDB values Same product5 postsTrouble with DuckDB cast Same product5 postsTrouble with DuckDB result Same product4 postsDuckDB runs out of memory Same product3 postsDuckDB costs outgrow the value it gives

History

MomentumOct 16, 2026steady to fading

AddedOct 15, 2026Experiments on DuckDB are hard to reproduce and track (2 posts)