Oihana Php Arango

isNull.php

isNull() : string: Builds an AQL expression that checks whether a value is `null`.

Builds an AQL expression that checks whether a value is `null`.


    
                    isNull(string $value) : string

This helper wraps the ArangoDB AQL function IS_NULL(), which returns true if the given value is null, and false otherwise.

Example AQL output:

IS_NULL(user.email)

$value : string: The AQL field or expression to check (e.g. 'user.email').

example

use function oihana\arango\db\functions\isNull;

$expr = isNull('user.email');
// Produces: 'IS_NULL(user.email)'

see

https://docs.arangodb.com/stable/aql/functions/type-check-and-cast/#is_null

since

1.0.0

author Marc Alcaraz

string —

The formatted AQL expression (e.g. 'IS_NULL(user.email)').