heman026 opened a new issue, #1797:
URL: https://github.com/apache/iceberg-python/issues/1797
### Question
Hi
I am reading an existing iceberg table using batch reader. The reader has
pyarrow schema. When creating Table using this pyarrow schema, the fields have
Field_id = -1 which is creating issue when having an partition Spec. Since
field_id = -1, different row is assigned as partition column instead of
intended one.
```
batches = catalog.load_table(source_table).scan().to_arrow_batch_reader()
partition_spec = PartitionSpec(PartitionField(
source_id = -1,
field_id = 1000,
name="event_date",
transform=DayTransform(),
))
catalog.create_table_if_not_exists(iceberg_table, batches.get_schema(),
partition_spec=partition_spec,
properties={'downcast-ns-timestamp-to-us-on-write': True,
PYARROW_USE_LARGE_TYPES_ON_READ: True})
```
Can you let me know how to create partition spec when having pyarrow schema.
Am I missing something.
Let me know if you need more info.
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