dmgcodevil opened a new issue #12597:
URL: https://github.com/apache/arrow/issues/12597
I'm using pyarrow to read parquet files, however, it fails to read some
files.
Error:
```
table = self._dataset.to_table(
File "pyarrow\_dataset.pyx", line 323, in pyarrow._dataset.Dataset.to_table
File "pyarrow\_dataset.pyx", line 2311, in
pyarrow._dataset.Scanner.to_table
File "pyarrow\error.pxi", line 143, in
pyarrow.lib.pyarrow_internal_check_status
File "pyarrow\error.pxi", line 114, in pyarrow.lib.check_status
OSError: Malformed levels. min: 60 max: 60 out of range. Max Level: 1
```
Based on my research the file that cannot be read uses a new 2.0 encoding
Column meta from the file that pyarrow reads successfully
`id: BINARY GZIP DO:0 FPO:630 SZ:101/63/0.62 VC:30
ENC:PLAIN_DICTIONARY,BIT_PACKED,RLE ST:[min: , max: D, num_nulls: 0]`
Column meta from the file that pyarrow fails to read
`id: BINARY GZIP DO:0 FPO:593 SZ:90/52/0.58 VC:30
ENC:RLE_DICTIONARY ST:[min: , max: D, num_nulls: 0]`
Based on Parquet spec, `RLE_DICTIONARY` is a new encoding format:
> Using the PLAIN_DICTIONARY enum value is deprecated in the Parquet 2.0
specification. Prefer using RLE_DICTIONARY in a data page and PLAIN in a
dictionary page for Parquet 2.0+ files.
Does Pyarrow support Parquet 2.0 format ?
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