Commits
Micah Kornfield authored and Antoine Pitrou committed 4be0ba49599
ARROW-4885: [C++/Python] Enable Decimal parsing in CSV - Create a new Decimal128 converter in csv (copies some code for eliminating white space, please let me know if this should be factored out). - Add python unit test - I filed ARROW-5699 to track 2 performance enhancements: * Add an UnsafeAppend and use it on the Decimal128Builder * Avoid multiple string copies in Decimal128::FromString. Author: Micah Kornfield <emkornfield@gmail.com> Closes #4660 from emkornfield/decimal_csv and squashes the following commits: 9933cd94f <Micah Kornfield> fix style b54013079 <Micah Kornfield> make format 5ef3c6cf1 <Micah Kornfield> address review feedback 86e03f973 <Micah Kornfield> Decimal128 CSV parsing