Data engineering·Files, formats and table layers
the tables are in the other columnar format, the one that came out of the Hive world, with stripes instead of row groups.
ORC
Also calledoptimized row columnar, Apache ORC
A columnar file format contemporary with Parquet, with comparable capabilities and different vocabulary — stripes rather than row groups, and built-in lightweight indexes. Which one a platform uses is nearly always a historical accident of its Hadoop lineage rather than a live technical decision. Knowing the word matters mostly so that a stripe-related error message is legible.