A few of the following key limitations in Hive prevent some regular Metadata Editor features from working as intended, and limit the structure of your SQL queries in Report Designer:
Outer joins are not supported.
Each column can only be used once in a SELECT clause.
Duplicate columns in SELECT statements cause errors.
Conditional joins can only use the = conditional unless you use a WHERE clause.
Any non-equal conditional in a FROM statement forces the Metadata Editor to use a Cartesian join and a WHERE clause conditional to limit it.
