org.apache.spark.sql.catalyst.expressions
Case statements of the form "CASE a WHEN b THEN c [WHEN d THEN e]* [ELSE f] END". When a = b, returns c; when a = d, returns e; else returns f.
Case statements of the form "CASE a WHEN b THEN c [WHEN d THEN e]* [ELSE f] END". When a = b, returns c; when a = d, returns e; else returns f.