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Type System

ReQL language comes with a basic type system and this section list the supported types.

As a user of the ReQL language, the only time you will need to explicitly provide type annotation is saving the result of jsonExtract (see jsonExtract for more details).

Primitive Types​

String​

Arbitrary length UTF-8 string. String literals is defined by double quote symbol.

ex. "hello world", "世界好"

Number​

Integer and floats. 

ex. 10, 1.2

Duration​

Duration of time, units supported include day, hr, min , s (second), ms (millisecond)

ex. 1hr, 200ms

Boolean​

True or false

ex. true, fale

Null​

Represent the absence of value; this is also the value that functions will return when there is a runtime error

ex. null

Jval (JSON Value)​

A type representing a JSON object inside ReQL. 

# Built in variable `EventData` is of type `JVal`
ex. EventData

Container Types​

Array​

A list of items

ex. `[1, 2, 3]`, `["a", 1, "b"]`

Map​

Map is the type name for a key value structure, equivalent to an object in javascript or dictionary in python.

ex. `{"a": 1, "b": 2}`