To compare each search value to the expression one by one, we can use the DECODE function that adds procedural if-then-else logic to the query.
Tag: Conditional Functions in Apache Impala
Apache Hive Conditional Functions
The conditional functions available in the Apache Hive are as follows. The most of them are also available in Apache Impala. The behavior of the
Handling NULL in Apache Impala
An significant part is the treatment of NULL values during data processing and reports. Sometimes it ends up with arithmetic overflow errors or null values
Big Data & SQL 