Alejandro Marco Ramos created ARROW-17774: ---------------------------------------------
Summary: Python: write csv cast error Key: ARROW-17774 URL: https://issues.apache.org/jira/browse/ARROW-17774 Project: Apache Arrow Issue Type: Bug Components: C++ Affects Versions: 8.0.0 Reporter: Alejandro Marco Ramos Hi, when try to write table with any field in `Decimal128` type, arrow raises with this message: {noformat} File c:\users\documents\projects\.venv\lib\site-packages\pyarrow\dataset.py:930, in write_dataset(data, base_dir, basename_template, format, partitioning, partitioning_flavor, schema, filesystem, file_options, use_threads, max_partitions, max_open_files, max_rows_per_file, min_rows_per_group, max_rows_per_group, file_visitor, existing_data_behavior, create_dir) 927 raise ValueError("Cannot specify a schema when writing a Scanner") 928 scanner = data --> 930 _filesystemdataset_write( 931 scanner, base_dir, basename_template, filesystem, partitioning, 932 file_options, max_partitions, file_visitor, existing_data_behavior, 933 max_open_files, max_rows_per_file, 934 min_rows_per_group, max_rows_per_group, create_dir 935 )File c:\users\documents\projects\.venv\lib\site-packages\pyarrow\_dataset.pyx:2737, in pyarrow._dataset._filesystemdataset_write()File c:\users\documents\projects\.venv\lib\site-packages\pyarrow\error.pxi:121, in pyarrow.lib.check_status() ArrowNotImplementedError: Unsupported cast from decimal128(21, 15) to utf8 using function cast_string{noformat} my data is: {noformat} In [137]: table Out[137]: pyarrow.Table col1: int64 col2: double col3: decimal128(21, 15) col4: string ---- col1: [[1,2,3,0]] col2: [[2.7,0,3.24,3]] col3: [[-304236.460000000000000,0.E-15,0.E-15,0.E-15]] col4: [["primera","segunda","tercera","cuarta"]]{noformat} Thanks in advance. -- This message was sent by Atlassian Jira (v8.20.10#820010)