mapleFU commented on issue #31678:
URL: https://github.com/apache/arrow/issues/31678#issuecomment-1689196976
```
>>> metadata_collector[0].schema
<pyarrow._parquet.ParquetSchema object at 0x11e3cee80>
required group field_id=-1 schema {
optional int64 field_id=-1 A;
optional binary field_id=-1 B (String);
}
>>> metadata_collector[1].schema
<pyarrow._parquet.ParquetSchema object at 0x11e3ceec0>
required group field_id=-1 schema {
optional binary field_id=-1 B (String);
optional int64 field_id=-1 A;
}
```
Oh I got this. This is not allowed. Though it looks like it should be
allowed.
Because Parquet schema is at "FileMetadata" ( see
https://github.com/apache/parquet-format/blob/master/src/main/thrift/parquet.thrift#L1024
), so different row-group should have same schema.
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