Problemsby IbisTrouble with DuckDB parquet
Databases2 posts from 2 people2d active+00 posts in the last 7 days, 1 the 7 days before (fading)Unverified
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The posts behind it
2, newest firstParquet writer: dictionary encoding turns -0.0 into 0.0 for FLOAT and DOUBLE columns### What happens When a FLOAT or DOUBLE column is written to Parquet with dictionary encoding, `-0.0` is read back as `0.0`. The dictionary treats the two zeros as the same value (they compare and hash equal), so one of them is replaced by the other. The same column written with...duckdb/duckdb · h4nsmullerOpen ↗External file cache range metadata grows for deleted local Parquet files in v1.5.6 despite buffer eviction### What happens? In DuckDB v1.5.6, repeatedly creating, fully reading and deleting distinct local Parquet files causes native allocation growth and accumulation of cached file/range metadata, even while the external **data buffers** are being evicted and their reported memory...duckdb/duckdb · brookqin1 repliesOpen ↗
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About this problem
Evidence
2 posts from 2 people in 1 place, about 1 a week over 10 days. Mostly on duckdb/duckdb. Tools named alongside: GitHub, IEEE.
Frustration Frustration 0 of 3· Seen on GitHub issues
How it was grouped
Posts about DuckDB with no known issue, sharing the word "parquet". First post Oct 2, 2026, latest Oct 11, 2026. Unverified: fewer than 3 posts, or one person or place only. Method
Other DuckDB problems
DuckDB upgrades break working setupsDuckDB users keep filing bugsTrouble with DuckDB columnTrouble with DuckDB overflowDuckDB error messages are crypticTrouble with DuckDB internalTrouble with DuckDB nullTrouble with DuckDB valuesTrouble with DuckDB castTrouble with DuckDB resultDuckDB runs out of memoryDuckDB costs outgrow the value it gives
History
steady to fading
Trouble with DuckDB parquet (2 posts)