Problemsby GlyphBad data slips through Apache Iceberg unnoticed
3 posts from 3 people3d activeSteady, +2 this week
Posts per day
The posts behind it
API: Evaluator matches null values for notEq and notIn
### Feature Request / Improvement ## Problem `Evaluator` compares through literal comparators that order null first, so `eq` is false and `notEq` is true for a null value. `in` returns false for null, so `notIn` is true. Under SQL three-valued logic, `x <> v` and `x NOT IN...
Core: Metadata DELETE can incorrectly remove NULL date partitions
### Apache Iceberg version 1.10.0 ### Query engine Spark ### Please describe the bug 🐞 For a table partitioned by a nullable date column, a metadata DELETE using `<` can incorrectly remove rows from the NULL partition. The behavior depends on the manifest layout. For example,...
Spark: metadata-only DELETE can remove NULL rows for `<>`, single-value `NOT IN` and `NOT LIKE`
### Apache Iceberg version main (`e70a2efcd`) ### Query engine Spark 4.2. The same `NOT_EQ` and `NOT` conversion paths exist in the Spark 3.5, 4.0 and 4.1 source directories, but I haven't run the reproduction on those versions. ### Please describe the bug 🐞 `DELETE FROM t...
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About this problem
Evidence
3 posts from 3 people in 1 place, about 2 a week over 8 days. Mostly on apache/iceberg.
Frustration Frustration 0 of 3· Seen on GitHub issues
How it was grouped
Posts that state a pain and match the "data-quality" rule about Apache Iceberg. First post Oct 22, 2026, latest Oct 29, 2026. Corroborated: 3 or more posts from 2 or more people or places. Method
The same problem elsewhere
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Other Apache Iceberg problems
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Apache Iceberg users keep filing bugs
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Trouble with Apache Iceberg spark
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Apache Iceberg runs out of memory
4 posts from 3 people on GitHub issues.
Trouble with Apache Iceberg rest
Top post: "Core: Negative delete-file-references in REST scan response cause IndexOutOfBoundsException", one of 4 posts from 3 people on Reddit, GitHub issues.
Apache Iceberg connectors and syncs are fragile
3 posts from 3 people on GitHub issues.
Trouble with Apache Iceberg delete
Top post: "Iceberg DROP PARTITION aborts or republishes parent delete counters after an overwrite snapshot", one of 3 posts from 3 people on GitHub issues.
Trouble with Apache Iceberg pruning
Top post: "API: Predicate evaluation and file pruning treat -0.0 and 0.0 as different values", one of 2 posts from 2 people on GitHub issues. Unverified.
Apache Iceberg schema changes break downstream pipelines
2 posts from 2 people on GitHub issues. Unverified.
Apache Iceberg deprecations force unplanned migrations
2 posts from 2 people on GitHub issues. Unverified.
Apache Iceberg tables suffer from small files and skew
2 posts from 2 people on GitHub issues. Unverified.
History