Overview

Relyt supports built-in functions and operators including window functions that can be used in window expressions. Functions supported by Relyt can be classified into the following three types:

Function type	Supported	Description	Remarks
IMMUTABLE	Yes	Does not modify the database, and always returns the same result if given the same argument values.	N/A
STABLE	Yes, in most cases	Returns the same result within a table scan, if given the same argument values.	The returned results vary with database lookups and parameter values. Functions of the current_timestamp family are STABLE.
VOLATILE	Restricted	Function values can change within a single table scan. For example, random(), timeofday()	Any function with side effects is volatile, even if its result is predictable. For example, setval().