# CreateColumnsOperationProperty

A transform operation that creates calculated columns.

Columns created in one such operation form a lexical closure.

- Source: Generated code
- Type last changed: v2.224.0 · 13 Nov 2025

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import { aws_quicksight as quicksight } from 'aws-cdk-lib';
const createColumnsOperationProperty: quicksight.CfnDataSet.CreateColumnsOperationProperty = {
  columns: [{
    columnId: 'columnId',
    columnName: 'columnName',
    expression: 'expression',
  }],

  // the properties below are optional
  alias: 'alias',
  source: {
    transformOperationId: 'transformOperationId',

    // the properties below are optional
    columnIdMappings: [{
      sourceColumnId: 'sourceColumnId',
      targetColumnId: 'targetColumnId',
    }],
  },
};
```

## Properties

- `alias`: string — Alias for this operation.

- `columns`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) | [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) | [CfnDataSet.CalculatedColumnProperty](/cdk/api/v2/docs/aws-cdk-lib.aws_quicksight.CfnDataSet.CalculatedColumnProperty.html)[] (required) — Calculated columns to create.

- `source`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) | [CfnDataSet.TransformOperationSourceProperty](/cdk/api/v2/docs/aws-cdk-lib.aws_quicksight.CfnDataSet.TransformOperationSourceProperty.html) — The source transform operation that provides input data for creating new calculated columns.