dmgcodevil commented on issue #6587:
URL: https://github.com/apache/iceberg/issues/6587#issuecomment-1386300159
@RussellSpitzer I forgot that we also partition by another field using
`bucket` transform. original spec:
```json
"partition-spec" : [ {
"name" : "timestamp1_day",
"transform" : "day",
"source-id" : 2,
"field-id" : 1000
}, {
"name" : "id_bucket",
"transform" : "bucket[5]",
"source-id" : 1,
"field-id" : 1001
} ],
```
Folder structure:
```
/timestamp1_day=2023-01-01/id_bucket=1/
```
After update:
Spec:
```json
"partition-spec" : [ {
"name" : "timestamp1_day",
"transform" : "void",
"source-id" : 2,
"field-id" : 1000
}, {
"name" : "id_bucket",
"transform" : "bucket[5]",
"source-id" : 1,
"field-id" : 1001
}, {
"name" : "timestamp2_day",
"transform" : "day",
"source-id" : 3,
"field-id" : 1002
} ]
```
Folder structure:
```
/timestamp1_day=null/id_bucket=1/timestamp2_day=2023-01-03/
```
The folder structure is different from the original, i.e.: `id_bucket`
comes before `timestamp2_day`. Is it expected?
I couldn't reproduce `Wrong class, java.lang.Long, for object: 19367`, I'll
keep trying.
I updated my
[example](https://bbgithub.dev.bloomberg.com/gist/rpliashkou/40f63ae0c2db036cfb2840185d916296)
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