ArangoDB v3.12 is under development and not released yet. This documentation is not final and potentially incomplete.
AQL offers an extensive set of functions to allow for complex computations and it supports user-defined functions
Functions can be called at any query position where an expression is allowed. The general function call syntax is:
FUNCTIONNAME is the name of the function to be called, and
is a comma-separated list of function arguments. If a function does not need any
arguments, the argument list can be left empty. However, even if the argument
list is empty, the parentheses around it are still mandatory to make function
calls distinguishable from variable names.
Some example function calls:
In contrast to collection and variable names, function names are case-insensitive,
length(foo) are equivalent.