Operators

You can use a variety of mathematical and logical operators such as Is Greater Than, In Range, Is True, or Has Field to filter Event Types, Events and Fields based on their values and properties.

This section describes all the operators available for building Transformations and illustrates their usage through a sample Hash Fields Transformation.

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Equals and Not Equals

Description:	Filter an Event or field if its value is equal or not equal to the specified value.
Filter On:	All Events, Event Type, Event Field. All Fields, Field Name, Field Value.
Settings:	Enter value: Provide a value to compare the Event or field value with.
Transformation Considerations:	None.

Example:

Filters:
Event Type = All Events.
Fields = All Fields with Name = Marks.

Result:
All fields with name = Marks are hashed as per your selected algorithm (MD5).

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Greater Than and Greater Than Equal To

Description:	Filter an Event or field if its value is greater than or greater than equal to the specified value.
Filter On:	All Events, Event Type, Event Field. All Fields, Field Name, Field Value.
Settings:	Enter Value: Provide a value to compare the Event or field value with.
Transformation Considerations:	None.

Example:

Filters:
Event Type = All Events.
Fields = All fields with value greater than 40.

Result:
All field values greater than 40 are hashed as per your selected algorithm (MD5).

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Lesser Than and Lesser Than Equal To

Description:	Filter an Event or field if its value is lesser than or lesser than equal to the specified value.
Filter On:	All Events, Event Type, Event Field. All Fields, Field Name, Field Value.
Settings:	Enter Value: Provide a value to compare the Event or field value with.
Transformation Considerations:	None.

Example:

Filters:
Event Type = All Events.
Fields = All fields with value lesser than 40.

Result:
All field values lesser than 40 are hashed as per your selected algorithm (MD5).

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In Range and Not In Range

Description:	Filter an Event or field if it lies or does not lie in the specified range.
Filter On:	All Events, Event Type, Event Field. All Fields, Field Name, Field Value.
Settings:	Enter Start and End Value: Provide a start and end value to compare your Event or field value with.
Transformation Considerations:	The end value is not included.

Example:

Filters:
Event Type = All Events.
Fields = All fields with Start Value = 5, End Value = 60.

Result:
All field values between 5 and 60 are hashed as per your selected algorithm (MD5).

![Transformed Events where field values in range 1000, 2000]https://res.cloudinary.com/hevo/image/upload/v1650421031/hevo-docs/TransformationsImages8502/In-Range-1.png)

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In and Not In

Description:

Allows you to specify a comma-separated list of values in a filter.

Sample Usage

Scenario: In the Event Type, week1.cp, if any of these fields: Units07, Units08, and Units09 have a value less than 100, change it to 100.

Settings: We can use the Change Field Values block for the Transformation, and the In operator to select the three fields at once, as follows:

Result: When you test the Transformation, as the values of the fields Units07 and Units09 match the criteria, these are updated to 100.

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Starts With

Description:	Filter an Event or field if it starts with the specified value. The value must be of type String .
Filter On:	All Events, Event Type, Event Field. All Fields, Field Name, Field Value.
Settings:	Enter Value: Provide the starting string to identify Events or fields to be filtered.
Transformation Considerations:	None.

Example:

Filters:
Event Type = All Events.
Fields = All fields whose names start with Student.

Result:
All field names starting with Student are hashed as per your selected algorithm (MD5).

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Matches

Description:	Filter an Event or field if it matches the specified pattern.
Filter On:	All Events, Event Type, Event Field. All Fields, Field Name, Field Value.
Settings:	- Regex: Provide a Regular Expression to specify your pattern. - Complete String: Provide a string that specifies your complete pattern.
Transformation Considerations:	None.

Example:

Filters:
Event Type = All Events.
Fields = All fields with name = test whose value contains the string abcd.

Result:
All fields with name = test whose value contains the string abcd are hashed as per your selected algorithm (MD5).

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Is True and Is False

Description:	Filter an Event or field if its value is true or false.
Filter On:	All Events, Event Type, Event Field. All Fields, Field Name, Field Value.
Settings:	Select a Boolean Value.
Transformation Considerations:	None.

Example:

Filters:
Event Type = All Events.
Fields = All Fields with Name = is_bizzed having value true.

Result:
All fields with name = is_bizzed whose value = true are hashed as per your selected algorithm (MD5).

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Matches Type and Not Matches Type

Description:	Filter an Event or field if its value matches type or not.
Filter On:	All Events, Event Field. All Fields, Field Value.
Settings:	Select a Data Type. For example, Boolean.
Transformation Considerations:	None.

Example:

Filters:
Event Type = All Events.
Fields = All fields with value matching type Numeric.

Result:
All field values matching type numeric are hashed as per your selected algorithm (MD5).

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Has Field and Does Not Have Field

Description:	Filter an Event if it has or does not have a specific field.
Filter On:	All Events, Event Type.
Settings:	Enter Field Name: Provide a field name that you would like your event to have.
Transformation Considerations:	None.

Example:

Filters:
Event Type = All Events with Field Name = Result.

Result:
All fields of events with field name = Result are hashed as per your selected algorithm (MD5).

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