ZUzui·Sep 16, 2025
Awesome that the iceberg write is now possible from duckdb!
https://github.com/duckdb/duckdb-iceberg
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duckdb-iceberg
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duckdb / duckdb-iceberg
duckdb-iceberg
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| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
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| Aug 2024 | 2024-08-01 00:00:00 UTC | 2024-09-01 00:00:00 UTC | 0 | 0 | 0 |
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| Sep 2025 | 2025-09-01 00:00:00 UTC | 2025-10-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
7 sourcesFivetran tried to upstream write support but it was not accepted
https://github.com/duckdb/duckdb-iceberg/pull/95
In Airport for DuckDBI was almost going to build a lakehouse* with DuckDB because I low-key love it, easiest and strongest analytical engine I've found yet: scale from laptops to big metal, while being mostly out-of-core when doing sane stuff, and avoiding distributed computing for SQL in the process (looking at you Spark).
That is until I found out it does not support Iceberg writes[1], big nono as I would need another engine for inserts, and I want a simple stack :(. What a bummer.
[1] https://github.com/duckdb/duckdb_iceberg/issues/37
*that is what they are called now aren't they? I just can't follow the terms anymore haha.
In Airport for DuckDBDoes DuckDB just delegate the query to S3 Tables? or does it do anything in-engine with the data files?
On thing that's missing in DuckDB is predicate pushdown for iceberg - see https://github.com/duckdb/duckdb-iceberg/issues/2
Which puts it way behind the competition, performance wise.
In Preview: Amazon S3 Tables and Lakehouse in DuckDBtracking write support here:
https://github.com/duckdb/duckdb-iceberg/issues/37
In Preview: Amazon S3 Tables and Lakehouse in DuckDBduckdb has the same issue[0], I submitted a PR, but it's been stalled
0 - https://github.com/duckdb/duckdb-iceberg/pull/78
In Apache IcebergThe `duckdb_iceberg`[0] extension doesn't support partitioning / predicate pushdown. Is that what you're using for pg_lakehouse?
0 - https://github.com/duckdb/duckdb_iceberg/issues/2
In Putting DuckDB in Postgres to Query Iceberg