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:documentationPath: /pipeline/transforms/
:language: en_US
:description: The Column Exists transforms allows you to verify the existence of a specific column in a database table.

= image:transforms/icons/columnexists.svg[Column exists transform Icon, role="image-doc-icon"] Column exists

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

The Column Exists transforms allows you to verify the existence of a specific column in a database table.

|
== 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
|Connection|The database connection to use
|Schema name|(optional) The schema name of the table of the column to check
|Table name|The name of the table of the column to check
|Tablename in field?|Enable to read the name of the table in an input field
|Tablename field|Specify the fieldns containing parameters and the parameter type
|Columnname field|The name of the column field in the input stream
|Result fieldname|The name of the resulting boolean flag field
|===