LINQ syntax differences: Devo APIs vs search window

Due to architectural differences, the LINQ syntax presents some particularities in the Devo APIs and the search window of the Devo app.

Therefore, keep in mind that copying a LINQ query from the search window and pasting it into an API request, or vice versa, might not work. Before examining the differences explained below, you can visit Build a query using LINQ to know the standard procedures when working with LINQ.

Alerts API

Note that due to technical reasons, the Alerts API is the only API that uses the LINQ syntax used in the search window of the Devo app. This is indicated in the different sections below.

Aggregation operations

Maximum (max) operations

When you use this operation in the Data Search to create a new field, you can add as many arguments as needed, however, the number of arguments is limited to two when used in APIs.

As a workaround, you can perform subsequent maximum operations until you have obtained the maximum of all the arguments you need.

Search window + Alerts API

Other Devo APIs

Syntax:

Create field: select max(value1, value2, value3, value4...) as maxField

Query example:

from demo.ecommerce.data
select max(bytesTransferred, timeTaken, statusCode) as `maxField`

Syntax:

Create field: select max(value1, value2) as maxFieldA, max(maxFieldA, value3) as maxFieldB, max(maxFieldB, value4) as maxFieldC...

Query example:

from demo.ecommerce.data
select max(bytesTransferred, timeTaken) as maxFieldA, max(maxFieldA, statusCode) as maxFieldTotal

Related articles: Maximum (max)

Minimum (min) operations

When you use this operation in the Data Search to create a new field, you can add as many arguments as needed, however, the number of arguments is limited to two when used in APIs.

As a workaround, you can perform subsequent minimum operations until you have obtained the minimum of all the arguments you need.

Search window + Alerts API

Other Devo APIs

Syntax:

Create field: select min(value1, value2, value3, value4...) as minField

Query example:

from demo.ecommerce.data
select min(bytesTransferred, timeTaken, statusCode) as `minField`

Syntax:

Create field: select min(value1, value2) as minFieldA, min(minFieldA, value3) as minFieldB, min(minFieldB, value4) as minFieldC...

Query example:

from demo.ecommerce.data
select min(bytesTransferred, timeTaken) as minFieldA, min(minFieldA, statusCode) as minFieldTotal)

Related articles: Minimum (min)

Arithmetic operations

Addition, sum, plus / Concatenation (add, +) operations

When you use this operation in the Data Search, you can add as many arguments as needed (where applicable), however, the number of arguments is limited to two when used in APIs.

As a workaround, you can perform subsequent adding operations until you have added all the arguments you need.

Search window + Alerts API

Other Devo APIs

Syntax:

Create field: select add(value1, value2, value3, value4...) as totalField

Query example:

from demo.ecommerce.data
select add(bytesTransferred, timeTaken, statusCode) as `totalField`

Syntax:

Create field: select add(value1, value2) as totalFieldA, add(totalFieldA, value3) as totalFieldB, add(totalFieldB, value4) as totalFieldC...

Query example:

from demo.ecommerce.data
select add(bytesTransferred, timeTaken) as totalFieldA, add(totalFieldA, statusCode) as totalFieldFinal

Related articles: Addition, sum, plus / Concatenation (add, +)

Multiplication, product (mul, *) operations

When you use this operation in the Data Search, you can add as many arguments as needed, however, the number of arguments is limited to two when used in APIs.

As a workaround, you can perform subsequent multiplication operations until you have multiplied all the arguments you need.

Search window + Alerts API

Other Devo APIs

Syntax:

Create field: select mul(value1, value2, value3, value4...) as resultField

Query example:

from demo.ecommerce.data
select mul(bytesTransferred, timeTaken, statusCode) as `resultField`

Syntax:

Create field: select mul(value1, value2) as resultFieldA, mul(resultFieldA, value3) as resultFieldB, mul(resultFieldB, value4) as resultFieldC...

Query example:

from demo.ecommerce.data
select mul(bytesTransferred, timeTaken) as resultFieldA, mul(resultFieldA, statusCode) as resultFieldTotal

Related articles: Multiplication, product (mul, *)

Lookup operations

Regular operations

Queries that use lookup operations present some particularities that make them incompatible when used from the search window to APIs or vice versa. The use of symbols is different and the domain name is required in one of them.

Search window + Alerts API

Other Devo APIs

Syntax:

select `lu/lookupName/lookupColumn`(field) as newColumnName

Query example:

from demo.ecommerce.data
select `lu/IP_list/StreetAddress`(clientIpAddress) as `IP street address`

Syntax:

select lu("lookupName", "lookupColumn", field) as newColumnName

Query example:

from demo.ecommerce.data
select lu("IP_list", "StreetAddress", clientIpAddress) as `IP street address`

Related article: Data enrichment

JSON operations

Queries that use lookup operations with JSON present some particularities that make them incompatible when used from the search window to APIs or vice versa. The use of symbols is different and a specific json command is required in one of them.

Search window + Alerts API

Other Devo APIs

Syntax:

select `lu/lookupName`(field) as newColumnName

Query example:

from demo.ecommerce.data
select `lu/IP_list`(clientIpAddress) as `jsonField`

Syntax:

select hlurjson("Domain_name", "lookup_name", field, eventdate) as json

Query example:

from demo.ecommerce.data
select hlurjson("demo", "IP_list", clientIpAddress, eventdate) as `json`

Related article: Data enrichment

Mlevalmodel operation

mlevalmodel operation is not supported in search window. Use this operation in APIs when you want to work with models you uploaded in Model Management.

Search window

Devo APIs

Not supported

Query examples:

from "datatable"
select "fields"
mlevalmodel("domain", "ModelName", "ModelFields") as "NameNewField"

Example:

from demo.ecommerce.data
select
  split(referralUri, "/",2) as domain,
  float(lenght(domain)) as lenght
  shannonentropy(domain) as entropy
  float(countbyfilter(domain, "aeiuoAEIOU")) as p_vowels,
  mlevamodel("self", "example_test", lenght, entropy, p_vowels) as prob
  ifthenelse(prob>0.8, "dga", "legit") as type

Refer article: Model Management