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Florian Müller authored and Jorge C. Leitao committed b9e94d3aaae
ARROW-10674: [Rust] Fix BigDecimal to be little endian; Add IPC Reader/Writer for Decimal type to allow integration tests This is a follow up to #8640 Currently, there is a first working IPC reader/writer test using data from `testing/arrow-ipc-stream/integration/0.14.1/generated_decimal.arrow_file` However, this lead me to discover that my first decimal type implementation is wrong, in that it uses BigEndian, whereas this is parquet specific and therefore should not be used in arrow/array and so on. I will try to address this in this PR as well. Closes #8784 from sweb/rust-decimal-ipc Authored-by: Florian Müller <florian@tomueller.de> Signed-off-by: Jorge C. Leitao <jorgecarleitao@gmail.com>