[jira] [Created] (ARROW-12054) [C++] Parquet statistics incorrect for decimal128

["Weston Pace (Jira)" <ji...@apache.org>]

Weston Pace created ARROW-12054:
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             Summary: [C++] Parquet statistics incorrect for decimal128
                 Key: ARROW-12054
                 URL: https://issues.apache.org/jira/browse/ARROW-12054
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: Weston Pace


{code:java}
import decimal

import pyarrow as pa
import pyarrow.parquet as pq

dtype = pa.decimal128(12, 4)
ctx = decimal.Context(prec=12)
arr = pa.array([0, ctx.create_decimal(3.99)], dtype)
table = pa.Table.from_arrays([arr], ["foo"])
pq.write_table(table, '/tmp/foo.pq')
meta = pq.read_metadata('/tmp/foo.pq')
print(meta.row_group(0).column(0).statistics)

{code}
Expected 0 to be the min and 3.99 to be the max but got the reverse.



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