Regular Match

• Expression: <string> =~ "<regexp>"
• Left operand: string
• Right operand: regular expression

Constant

Example: judge if String "adfAWa" is composed of uncapitalized letters

UQL
return "Ultipa" =~ "^[a-z]+$"

Result
0

Function

Example: Convert 'Graph Database' to lowercase and judge whether it is composed of uncapitalized letters

UQL
return lower("Ultipa.com") =~ "^[a-z]+$"

Result
0

Alias

Example: Judge each row of an alias whether it is composed of uncapitalized letters

UQL
uncollect ["Ultipa.com", "grAph", "graph"] as a
return a =~ "^[a-z]+$"

Result
0
0
1

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

Run below UQLs one by one in an empty graphset to create graph data: ```customlang___fold__lang_uql 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:"[email protected]"},{_id:"P002",_uuid:2,age:27,email:"[email protected]"}]) insert().into(@student).nodes([{_id:"S001",_uuid:3,age:27,email:"[email protected]"},{_id:"S002",_uuid:4,age:20,email:"[email protected]"},{_id:"S003",_uuid:5,age:25,email:"[email protected]"}]) ```

Property

Example: Find nodes whose email is in format [email protected] or [email protected]

UQL
find().nodes({email =~ "^[a-zA-Z0-9_.-]+@[a-zA-Z0-9]+\.(com|cn)$"}) as n
return n{*} 

Result
|--------------- @professor --------------|
|  _id  | _uuid |  age  |       email     |
|-------|-------|-------|-----------------|
| P001  |   1   |  53   | [email protected]   |
| P002  |   2   |  27   | [email protected] |

|---------------- @student ---------------|
|  _id  | _uuid |  age  |       email     |
|-------|-------|-------|-----------------|
| S003  |   5   |  25   | [email protected]  |

Example: Find nodes of @professor, whose email is in format [email protected] or [email protected]

UQL
find().nodes({@professor.email =~ "^[a-zA-Z0-9_.-]+@[a-zA-Z0-9]+\.(com|cn)$"}) as n
return n{*} 

Result
|--------------- @professor --------------|
|  _id  | _uuid |  age  |       email     |
|-------|-------|-------|-----------------|
| P001  |   1   |  53   | [email protected]   |
| P002  |   2   |  27   | [email protected] |