Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/20023#discussion_r162246975
--- Diff: docs/sql-programming-guide.md ---
@@ -1795,6 +1795,11 @@ options.
- Since Spark 2.3, when all inputs are binary, SQL `elt()` returns an
output as binary. Otherwise, it returns as a string. Until Spark 2.3, it always
returns as a string despite of input types. To keep the old behavior, set
`spark.sql.function.eltOutputAsString` to `true`.
+ - Since Spark 2.3, by default arithmetic operations between decimals
return a rounded value if an exact representation is not possible. This is
compliant to SQL standards and Hive's behavior introduced in HIVE-15331. This
involves the following changes
--- End diff --
Hive's version is 2.2. We have to emphasize it.
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