Use UpdateTable with an AWS SDK

    /// <summary>
    /// Updates the movie table to add a boolean column named watched.
    /// </summary>
    /// <param name="keyspaceName">The keyspace containing the table.</param>
    /// <param name="tableName">The name of the table to change.</param>
    /// <returns>The Amazon Resource Name (ARN) of the updated table.</returns>
    public async Task<string> UpdateTable(string keyspaceName, string tableName)
    {
        var newColumn = new ColumnDefinition { Name = "watched", Type = "boolean" };
        var request = new UpdateTableRequest
        {
            KeyspaceName = keyspaceName,
            TableName = tableName,
            AddColumns = new List<ColumnDefinition> { newColumn }
        };
        var response = await _amazonKeyspaces.UpdateTableAsync(request);
        return response.ResourceArn;
    }

    public static void updateTable(KeyspacesClient keyClient, String keySpace, String tableName) {
        try {
            ColumnDefinition def = ColumnDefinition.builder()
                    .name("watched")
                    .type("boolean")
                    .build();

            UpdateTableRequest tableRequest = UpdateTableRequest.builder()
                    .keyspaceName(keySpace)
                    .tableName(tableName)
                    .addColumns(def)
                    .build();

            keyClient.updateTable(tableRequest);

        } catch (KeyspacesException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

suspend fun updateTable(
    keySpace: String?,
    tableNameVal: String?,
) {
    val def =
        ColumnDefinition {
            name = "watched"
            type = "boolean"
        }

    val tableRequest =
        UpdateTableRequest {
            keyspaceName = keySpace
            tableName = tableNameVal
            addColumns = listOf(def)
        }

    KeyspacesClient { region = "us-east-1" }.use { keyClient ->
        keyClient.updateTable(tableRequest)
    }
}

class KeyspaceWrapper:
    """Encapsulates Amazon Keyspaces (for Apache Cassandra) keyspace and table actions."""

    def __init__(self, keyspaces_client):
        """
        :param keyspaces_client: A Boto3 Amazon Keyspaces client.
        """
        self.keyspaces_client = keyspaces_client
        self.ks_name = None
        self.ks_arn = None
        self.table_name = None

    @classmethod
    def from_client(cls):
        keyspaces_client = boto3.client("keyspaces")
        return cls(keyspaces_client)


    def update_table(self):
        """
        Updates the schema of the table.

        This example updates a table of movie data by adding a new column
        that tracks whether the movie has been watched.
        """
        try:
            self.keyspaces_client.update_table(
                keyspaceName=self.ks_name,
                tableName=self.table_name,
                addColumns=[{"name": "watched", "type": "boolean"}],
            )
        except ClientError as err:
            logger.error(
                "Couldn't update table %s. Here's why: %s: %s",
                self.table_name,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise