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Posted to issues@paimon.apache.org by "0dunay0 (via GitHub)" <gi...@apache.org> on 2025/10/31 16:31:33 UTC
[I] [Bug] Regression in Redshift Spectrum Querying Iceberg Table [paimon]
0dunay0 opened a new issue, #6502:
URL: https://github.com/apache/paimon/issues/6502
### Search before asking
- [x] I searched in the [issues](https://github.com/apache/paimon/issues) and found nothing similar.
### Paimon version
master branch `d0b66f272ca5cdfb4f8f588b37b2461f1c34e06c`
### Compute Engine
Flink
### Minimal reproduce step
When using Paimon tables with Iceberg compatibility enabled, querying via AWS Redshift Spectrum fails with the following error:
```
[2025-10-30 15:05:17] [XX000] ERROR:
[2025-10-30 15:05:17] -----------------------------------------------
[2025-10-30 15:05:17] error: Error parsing table metadata.
[2025-10-30 15:05:17] code: 15003
[2025-10-30 15:05:17] context: Required field total-records missing.
[2025-10-30 15:05:17] query: 0
[2025-10-30 15:05:17] location: json_utils.hpp:56
[2025-10-30 15:05:17] process: padbmaster [pid=1073857039]
[2025-10-30 15:05:17] -----------------------------------------------
```
### What doesn't meet your expectations?
I checked a table created last year and hasn't been updated since (don't remember the version used to create it). That table had the summary stats needed by Spectrum. It looks like one of the refactorings in the past year got rid of it.
Our use case requires querying Iceberg tables from Redshift warehouse.
```
cat old_paimon_iceberg_table_from_last_year_metadata.json | jq '.snapshots[0].summary'
{
"operation": "append",
"flink.operator-id": "f6dc7f4d2283f4605b127b9364e21148",
"flink.job-id": "c36bef679b5b9f6d8cb121f4a76c430c",
"flink.max-committed-checkpoint-id": "1",
"added-data-files": "18",
"added-records": "2741136",
"added-files-size": "203739326",
"changed-partition-count": "4",
"total-records": "2741136",
"total-files-size": "203739326",
"total-data-files": "18",
"total-delete-files": "0",
"total-position-deletes": "0",
"total-equality-deletes": "0"
}
cat new_paimon_iceberg_table_metadata.json | jq '.snapshots[0].summary'
{
"operation": "append"
}
```
While the [Iceberg specification](https://iceberg.apache.org/spec/#optional-snapshot-summary-fields) lists these fields as "optional," certain query engines like Redshift Spectrum treat some of them (particularly total-records) as required for proper metadata parsing.
### Anything else?
_No response_
### Are you willing to submit a PR?
- [x] I'm willing to submit a PR!
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Re: [I] [Bug] Regression in Redshift Spectrum Querying Iceberg Table [paimon]
Posted by "JingsongLi (via GitHub)" <gi...@apache.org>.
JingsongLi closed issue #6502: [Bug] Regression in Redshift Spectrum Querying Iceberg Table
URL: https://github.com/apache/paimon/issues/6502
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