What is Constants in Cassandra Query Language [CQL]

CQL Constants

Following are the kind of constants in CQL

Constants	Defining Value
string	\'' (any character where ' can appear if doubled)+ '\''  '$$' (any character other than '$$') '$$'
integer	re('-?[0-9]+')
float	re('-?[0-9]+(\.[0-9]*)?([eE][+-]?[0-9+])?') | NAN | INFINITY
boolean	TRUE | FALSE
uuid	hex{8}-hex{4}-hex{4}-hex{4}-hex{12}
hex	re("[0-9a-fA-F]")
blob	'0' ('x' | 'X') hex+

Remark Point:-

• A string constant is an arbitrary sequence of characters enclosed by single-quote ('). Single-quote can be used without escaping ($$It's raining today$$).
• Integer, float and boolean constant are defined as expected. Note that the float allows NaN and Infinity constants.
• CQL supports UUID constants.
• Blobs content are provided in hexadecimal and prefixed by 0x.
• The special NULL constant denotes the absence of value.