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v4.3
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    中文EN
    v4.3

      Not

      • Expression: !<exp>
      • Operand: expression (true, false)
      <exp> Result
      0 1
      1 0

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

      Run below UQLs one by one in an empty graphset to create graph data:

      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"}])
      

      Common Usage

      Example: Find nodes of @student, whose age is not 27

      find().nodes({@student && !(age==27)}) as n
      return n{*}
      

      |---------------- @student ---------------|
      |  _id  | _uuid |  age  |       email     |
      |-------|-------|-------|-----------------|
      | S002  |   4   |  20   | test@w3.org     |
      | S003  |   5   |  25   | test@gmail.com  |
      

      Analysis: This filter cannot be composed as {!(@student.age == 27)}, which is equivalent to {!@student || !(age == 27)} and outputs:

      |--------------- @professor --------------|
      |  _id  | _uuid |  age  |       email     |
      |-------|-------|-------|-----------------|
      | P001  |   1   |  53   | test@yahoo.cn   |
      | P002  |   2   |  27   | test@ultipa.com |
      
      |---------------- @student ---------------|
      |  _id  | _uuid |  age  |       email     |
      |-------|-------|-------|-----------------|
      | S002  |   4   |  20   | test@w3.org     |
      | S003  |   5   |  25   | test@gmail.com  |
      
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