• Expression: <value1> == <value2>
• Operand: number, time, string

Constant

Example: Judge whether "Ultipa" equals "U1tipa"

return "Ultipa" == "U1tipa"

0

Function

Example: Judge whether PI equals 3

return pi() == 3

0

Alias

Example: Judge each row of an alias whether it equals 2

uncollect [1,2,3,2,2] as a
return a == 2

0
1
0
1
1

Sample graph: (to be used for the following examples)

create().node_schema("professor").node_schema("student")
create().node_property(@*, "age", int32).node_property(@*, "email", string)
insert().into(@professor).nodes([{_id:"P001",_uuid:1,age:53,email:"test@yahoo.cn"},{_id:"P002",_uuid:2,age:27,email:"test@ultipa.com"}])
insert().into(@student).nodes([{_id:"S001",_uuid:3,age:27,email:"test@yeah.net"},{_id:"S002",_uuid:4,age:20,email:"test@w3.org"},{_id:"S003",_uuid:5,age:25,email:"test@gmail.com"}])

Property

Example: Find nodes whose age is 27

find().nodes({age == 27}) as n
return n{*} 

|--------------- @professor --------------|
|  _id  | _uuid |  age  |       email     |
|-------|-------|-------|-----------------|
| P002  |   2   |  27   | test@ultipa.com |

|---------------- @student ---------------|
|  _id  | _uuid |  age  |       email     |
|-------|-------|-------|-----------------|
| S001  |   3   |  27   | test@yeah.net   |

Example: Find nodes of @professor, whose age is 27

find().nodes({@professor.age == 27}) as n
return n{*} 

|--------------- @professor --------------|
|  _id  | _uuid |  age  |       email     |
|-------|-------|-------|-----------------|
| P002  |   2   |  27   | test@ultipa.com |

_uuid (Abbreviated)

When a filter only judges whether the _uuid of the current node/edge equals an integer, the filter can be abbreviated as below:

Example: Find node with _uuid 1

find().nodes(1) as n
return n{*} 

|--------------- @professor --------------|
|  _id  | _uuid |  age  |       email     |
|-------|-------|-------|-----------------|
| P001  |   1   |  53   | test@yahoo.cn   |