Flat File Compression In Polybase

For today's post, I want to look at how well Polybase on Hadoop can handle different compression formats.  I'm going to use the same compression codec (org.apache.hadoop.io.compress.DefaultCodec) for each.  Each file will be a small, 777-record file set of second basemen, and I will run two queries, one which is a simple SELECT *, and one which…