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:documentationPath: /pipeline/transforms/
:language: en_US
:description: The Set Field Value To A Constant transform replaces the value of a field with a hard coded constant value that you define.

= image:transforms/icons/constant.svg[Set field value to a constant transform Icon, role="image-doc-icon"] Set field value to a constant

[%noheader,cols="3a,1a", role="table-no-borders" ]
|===
|
== Description

The Set Field Value To A Constant transform replaces the value of a field with a hard coded constant value that you define.

|
== Supported Engines
[%noheader,cols="2,1a",frame=none, role="table-supported-engines"]
!===
!Hop Engine! image:check_mark.svg[Supported, 24]
!Spark! image:question_mark.svg[Maybe Supported, 24]
!Flink! image:question_mark.svg[Maybe Supported, 24]
!Dataflow! image:question_mark.svg[Maybe Supported, 24]
!===
|===

== Options

[options="header"]
|===
|Option|Description
|Transform name|Name of the transform this name has to be unique in a single pipeline.
|Use variable in constant|Select to use a variable replacement within a constant.
|Field|Specify the field that contains the value you want to replace.
|Replace by value|Specify the value that will replace the original field value specified.
|Conversion mask (Date)|Specify a date format for the replaced field.
See Common Formats for information on common valid date formats you can use in this transform.
|Set empty string?|Specify Y to allow an empty string when the value is empty; otherwise, a null value is used.
|===
