Tishj opened a new issue, #13305:
URL: https://github.com/apache/iceberg/issues/13305
### Apache Iceberg version
1.9.1 (latest release)
### Query engine
None
### Please describe the bug 🐞
There is a `discriminator`, but no accompanying `oneOf` or `anyOf` directive.
```yml
TableRequirement:
type: object
discriminator:
propertyName: type
mapping:
assert-create: '#/components/schemas/AssertCreate'
assert-table-uuid: '#/components/schemas/AssertTableUUID'
assert-ref-snapshot-id: '#/components/schemas/AssertRefSnapshotId'
assert-last-assigned-field-id:
'#/components/schemas/AssertLastAssignedFieldId'
assert-current-schema-id:
'#/components/schemas/AssertCurrentSchemaId'
assert-last-assigned-partition-id:
'#/components/schemas/AssertLastAssignedPartitionId'
assert-default-spec-id: '#/components/schemas/AssertDefaultSpecId'
assert-default-sort-order-id:
'#/components/schemas/AssertDefaultSortOrderId'
properties:
type:
type: string
required:
- type
```
To me this looks like it violates this rule defined in the
[spec](https://swagger.io/specification/) under "Discriminator Object":
> Note that discriminator MUST NOT change the validation outcome of the
schema.
As such, this object has a single field `type`, because there is no
directive to change the shape of the schema, `discriminator` can't change the
schema, it can only provide a hint for more efficient discovery of the matching
variant (referencing an item of the `oneOf`, `anyOf`)
### Willingness to contribute
- [ ] I can contribute a fix for this bug independently
- [ ] I would be willing to contribute a fix for this bug with guidance from
the Iceberg community
- [x] I cannot contribute a fix for this bug at this time
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