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Regenerate Float16 files without compression #42

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Merged
wgtmac merged 1 commit into from
Nov 22, 2023
Merged

Regenerate Float16 files without compression #42

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28 changes: 14 additions & 14 deletions data/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -261,23 +261,23 @@ t2 = pa.Table.from_arrays(
type=pa.float16())],
names="x")

pq.write_table(t1, "float16_zeros_and_nans.parquet")
pq.write_table(t2, "float16_nonzeros_and_nans.parquet")
pq.write_table(t1, "float16_zeros_and_nans.parquet", compression='none')
pq.write_table(t2, "float16_nonzeros_and_nans.parquet", compression='none')

m1 = pq.read_metadata("float16_zeros_and_nans.parquet")
m2 = pq.read_metadata("float16_nonzeros_and_nans.parquet")

print(m1.row_group(0).column(0))
print(m2.row_group(0).column(0))
# <pyarrow._parquet.ColumnChunkMetaData object at 0x7f24d48c4d60>
# file_offset: 72
# <pyarrow._parquet.ColumnChunkMetaData object at 0x7f79e9a3d850>
# file_offset: 68
# file_path:
# physical_type: FIXED_LEN_BYTE_ARRAY
# num_values: 3
# path_in_schema: x
# is_stats_set: True
# statistics:
# <pyarrow._parquet.Statistics object at 0x7f24d48c4ea0>
# <pyarrow._parquet.Statistics object at 0x7f79e9a3d940>
# has_min_max: True
# min: b'\x00\x80'
# max: b'\x00\x00'
Expand All @@ -287,22 +287,22 @@ print(m2.row_group(0).column(0))
# physical_type: FIXED_LEN_BYTE_ARRAY
# logical_type: Float16
# converted_type (legacy): NONE
# compression: SNAPPY
# compression: UNCOMPRESSED
# encodings: ('PLAIN', 'RLE', 'RLE_DICTIONARY')
# has_dictionary_page: True
# dictionary_page_offset: 4
# data_page_offset: 24
# total_compressed_size: 68
# data_page_offset: 22
# total_compressed_size: 64
# total_uncompressed_size: 64
# <pyarrow._parquet.ColumnChunkMetaData object at 0x7f24d48c4d60>
# file_offset: 84
# <pyarrow._parquet.ColumnChunkMetaData object at 0x7f79ea003c40>
# file_offset: 80
# file_path:
# physical_type: FIXED_LEN_BYTE_ARRAY
# num_values: 8
# path_in_schema: x
# is_stats_set: True
# statistics:
# <pyarrow._parquet.Statistics object at 0x7f24d48c4e50>
# <pyarrow._parquet.Statistics object at 0x7f79e9a3d8a0>
# has_min_max: True
# min: b'\x00\xc0'
# max: b'\x00@'
Expand All @@ -312,11 +312,11 @@ print(m2.row_group(0).column(0))
# physical_type: FIXED_LEN_BYTE_ARRAY
# logical_type: Float16
# converted_type (legacy): NONE
# compression: SNAPPY
# compression: UNCOMPRESSED
# encodings: ('PLAIN', 'RLE', 'RLE_DICTIONARY')
# has_dictionary_page: True
# dictionary_page_offset: 4
# data_page_offset: 34
# total_compressed_size: 80
# data_page_offset: 32
# total_compressed_size: 76
# total_uncompressed_size: 76
```
Binary file modified data/float16_nonzeros_and_nans.parquet
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Binary file modified data/float16_zeros_and_nans.parquet
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