Eclipse BIRT Report Object Model (ROM)
ComputedColumn Structure
| Display Name: | Computed Column |
| Since: | 1.0 |
A computed column is a user-defined column produced as an expression of other columns within the data set. It is not one of the columns retrieved directly from the underlying data provider.
| Type: | string |
| Since: | 2.2 |
| Required: | No |
| Display Name: | AggregateOn Function |
| JavaScript Type: | |
| Default Value: | None |
| Runtime Settable: | Yes |
| Type: | list |
| Since: | 2.2 |
| Required: | No |
| Display Name: | AggregateOn Expression |
| JavaScript Type: | |
| Default Value: | None |
| Runtime Settable: | Yes |
| Type: | List of AggregationArgument Structures |
| Since: | 2.2 |
| Required: | No |
| Display Name: | AggregateOn Function Arguments |
| JavaScript Type: | |
| Default Value: | None |
| Runtime Settable: | Yes |
Column data type property.
| Type: | choice (columnDataType) |
| Since: | 2.0 |
| Required: | No |
| Display Name: | Data Type |
| JavaScript Type: | |
| Default Value: | None |
| Runtime Settable: | No |
| Name | Display Name | Value | Description |
| integer | Integer | integer | |
| string | String | string | |
| date-time | Date Time | date-time | |
| decimal | Decimal | decimal | |
| float | Float | float | |
| boolean | Boolean | boolean | |
| date | Date | date | |
| time | Time | time | |
| blob | Blob | blob | |
| javaObject | Java Object | javaObject |
Column data type property.
| Type: | string |
| Since: | 2.2 |
| Required: | No |
| Display Name: | Column Display Name |
| JavaScript Type: | |
| Default Value: | None |
| Runtime Settable: | No |
| Type: | resourceKey |
| Since: | 2.5 |
| Required: | No |
| Display Name: | Column Display Name ID |
| JavaScript Type: | |
| Default Value: | None |
| Runtime Settable: | No |
The BIRT expression that defines the value of the computed column.
| Type: | expression |
| Context: | factory |
| Expression Type: | any |
| Since: | 1.0 |
| Required: | No |
| Display Name: | Expression |
| JavaScript Type: | |
| Default Value: | None |
| Runtime Settable: | No |
The expression that gets evaluated and its resulting value assigned to the computed column.
| Type: | expression |
| Context: | |
| Expression Type: | None |
| Since: | 2.2 |
| Required: | No |
| Display Name: | Filter Expression |
| JavaScript Type: | |
| Default Value: | None |
| Runtime Settable: | Yes |
The name of the computed column.
| Type: | memberKey |
| Since: | 1.0 |
| Required: | Yes |
| Display Name: | Column Name |
| JavaScript Type: | |
| Default Value: | None |
| Runtime Settable: | No |
The name of the computed column and is required. The name must be unique within the result set.
The Result Column Names section for the naming rules.