Using System Functions
The same set of system functions can be used for SQL Stream Builder as for Apache Flink.
As SSB runs on Flink, the following built-in system functions can also be used for data
   transformations in your SQL Jobs. 
 - Comparison Functions
 - Logical Functions
 - Arithmetic Functions
 - String Functions
 - Temporal Functions
 - Conditional Functions
 - Type Conversion Functions
 - Collection Functions
 - JSON Functions
 - Value Construction Functions
 - Value Access Functions
 - Grouping Functions
 - Hash Functions
 - Aggregate Functions
 - Column Functions
 
