Data and AI struggles

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Data engineering

Testing DuckDB pipelines and SQL is hard

2 posts from 2 people2d activeSteady, +1 this weekunverified

Posts per day

Posts per day2 posts, Oct 22 to Nov 4

The posts behind it

GitHub issuesunionai-oss/pandera · liviabedwellOct 30

ibis: empty tables fail column checks and nullable=False

**Describe the bug** With the ibis backend, validating a table with **zero rows** raises `SchemaError` for column checks and for non-nullable columns, even though no row can violate anything. The failure-case list in the error is empty. `isin` is used below as the minimal...

GitHub issuesapache/superset · alberttwongOct 22

[Dependencies] Track DuckDB 2.0 compatibility for duckdb and motherduck extras

### Dependency compatibility gap Superset's `duckdb` extra still excludes DuckDB 2.0, including on current `master`. This also affects the `motherduck` extra because it delegates to `apache-superset[duckdb]`. Verified on 2026-10-22: | Superset source | Declared DuckDB...

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Companies and products named

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About this problem

Evidence

2 posts from 2 people in 2 places, about 1 a week over 9 days. Mostly on apache/superset, unionai-oss/pandera. Tools named alongside: pandas, Apache Superset, GitHub, PyPI.

Frustration Frustration 0 of 3· Seen on GitHub issues

How it was grouped

Posts that state a pain and match the "data-testing" rule about DuckDB. First post Oct 22, 2026, latest Oct 30, 2026. Unverified: fewer than 3 posts, or one person or place only. Method

The same problem elsewhere

Testing data pipelines and SQL is hard

2 posts from 2 people on Reddit, GitHub issues. Unverified.

Other DuckDB problems

DuckDB upgrades break working setups

37 posts from 28 people on GitHub issues.

Experiments on DuckDB are hard to reproduce and track

6 posts from 4 people on GitHub issues.

Trouble with DuckDB returns

Top post: "Comparison simplification returns an incorrect result when a narrowing `DECIMAL` cast is used", one of 9 posts from 9 people on GitHub issues.

DuckDB users keep filing bugs

Top post: "latest alpha DuckDB 2.0 with Quack server on Windows/Linux got `Authentication failed` since several days ago", one of 23 posts from 15 people on GitHub issues.

Trouble with DuckDB internal

Top post: "duckdb 2.0.0 fails to launch on BE: `INTERNAL Error: The time zone data is corrupt`", one of 14 posts from 7 people on GitHub issues.

DuckDB error messages are cryptic

11 posts from 7 people on GitHub issues.

Trouble with DuckDB join

Top post: "Segfault in `dense_rank() OVER ()` over a RIGHT_ANTI hash join that returns its unmatched rows", one of 9 posts from 8 people on GitHub issues.

Trouble with DuckDB column

Top post: "2.0 alpha: comparing a CASE/split_part result to a constant fails with BindBuiltinScalarFunction did not", one of 7 posts from 5 people on GitHub issues.

Trouble with DuckDB cast

Top post: "TRY_CAST of an empty BLOB to BIT escapes a non-fallible __cast and invalidates the database", one of 7 posts from 6 people on GitHub issues.

Trouble with DuckDB null

Top post: "DuckDB: `HAVING` of `(φ IS TRUE) OR NOT (φ IS TRUE) AND …` is empty for a NULL `φ`, but the same boolean as", one of 6 posts from 6 people on GitHub issues.

Trouble with DuckDB values

Top post: "ManualVuln37 Unbounded Recursion in EncodeVariantValue Causes Stack Overflow via variant_comparator on Deeply", one of 6 posts from 6 people on GitHub issues.

Trouble with DuckDB parquet

Top post: "External file cache range metadata grows for deleted local Parquet files in v1.5.6 despite buffer eviction", one of 5 posts from 5 people on GitHub issues.

History

First seen with 2 posts.

Nov 4, 2026