class IcebergTransform 🔹

Language	Type name
.NET	Amazon.CDK.AWS.S3Tables.Alpha.IcebergTransform
Java	software.amazon.awscdk.services.s3tables.alpha.IcebergTransform
Python	aws_cdk.aws_s3tables_alpha.IcebergTransform
TypeScript (source)	@aws-cdk/aws-s3tables-alpha » IcebergTransform

Iceberg transform values for partition and sort fields.

Example

// Build a table with partition spec (minimal configuration)
const partitionedTable = new Table(scope, 'PartitionedTable', {
    tableName: 'partitioned_table',
    namespace: namespace,
    openTableFormat: OpenTableFormat.ICEBERG,
    icebergMetadata: {
        icebergSchema: {
            schemaFieldList: [
                { name: 'event_date', type: 'date', required: true },
                { name: 'event_name', type: 'string' },
            ],
        },
        icebergPartitionSpec: {
            fields: [
                {
                    sourceId: 1,
                    transform: IcebergTransform.IDENTITY,
                    name: 'date_partition',
                },
            ],
        },
    },
});

Properties

Name	Type	Description
value🔹	string	The string value of the transform.
static DAY🔹	IcebergTransform	Transform a timestamp/date field to day.
static HOUR🔹	IcebergTransform	Transform a timestamp field to hour.
static IDENTITY🔹	IcebergTransform	Use the column value as the transform value without transformation.
static MONTH🔹	IcebergTransform	Transform a timestamp/date field to month.
static YEAR🔹	IcebergTransform	Transform a timestamp/date field to year.

---

value🔹

Type: string

The string value of the transform.

---

static DAY🔹

Type: IcebergTransform

Transform a timestamp/date field to day.

---

static HOUR🔹

Type: IcebergTransform

Transform a timestamp field to hour.

---

static IDENTITY🔹

Type: IcebergTransform

Use the column value as the transform value without transformation.

---

static MONTH🔹

Type: IcebergTransform

Transform a timestamp/date field to month.

---

static YEAR🔹

Type: IcebergTransform

Transform a timestamp/date field to year.

Methods

Name	Description
toString()🔹	Returns the string representation of the transform.
static bucket(n)🔹	Transform values into a fixed number of buckets.
static of(value)🔹	Create a custom transform from a string value.
static truncate(width)🔹	Truncate values to a fixed width.

---

toString()🔹

public toString(): string

Returns

• string

Returns the string representation of the transform.

---

static bucket(n)🔹

public static bucket(n: number): IcebergTransform

Parameters

• n number — The number of buckets (must be a positive integer).

Returns

• IcebergTransform

Transform values into a fixed number of buckets.

---

static of(value)🔹

public static of(value: string): IcebergTransform

Parameters

• value string — The transform string value.

Returns

• IcebergTransform

Create a custom transform from a string value.

---

static truncate(width)🔹

public static truncate(width: number): IcebergTransform

Parameters

• width number — The truncation width (must be a positive integer).

Returns

• IcebergTransform

Truncate values to a fixed width.