- 表达式:
<value>
IS NOT NULL - 操作数:任意值
示例图集:(以下示例将在本图基础上运行)
在空图集中依次运行以下各行代码以创建该图数据:create().node_property(@default, "name").node_property(@default, "try1", int32).node_property(@default, "try2", int32).node_property(@default, "try3", int32)
insert().into(@default).nodes([{name:"Jason", try1:84}, {name:"Alice", try1:55, try2:79}, {name:"Lina"}, {name:"Eric", try1:39, try2:46, try3:61}, {name:"Pepe", try1:89}])
一般用法
示例:获取参加了第二次考试(即第一次重考)的学生,返回 name
find().nodes({try2 is not null }) as n
return n.name
Alice
Eric