The expression transformation allows adding, replacing and/or deleting columns.
This is generally done by supplying a column selection to work on and in the first two
cases an expression, name and optionally formatter to replace it with. The column selection
can either be a fixed set of columns or a column search expression that will be reevaluated each time
the transformation is executed. To be able to refer to the columns selected in expressions use
the column name symbol.
Inheritance Hierarchy
Spotfire.Dxp.DataDataTransformation
Spotfire.Dxp.Data.TransformationsExpressionTransformation
Namespace: Spotfire.Dxp.Data.Transformations
Assembly: Spotfire.Dxp.Data (in Spotfire.Dxp.Data.dll) Version: 25.11.10401.3615 (25.11.10401.3615)
Syntax
C#
[SerializableAttribute] [PersistenceVersionAttribute(3, 0)] public sealed class ExpressionTransformation : DataTransformation
The ExpressionTransformation type exposes the following members.
Constructors
Name | Description | |
---|---|---|
ExpressionTransformation |
Creates the transformation.
|
Methods
Name | Description | |
---|---|---|
Connect | Connect to the input reader, a DataRowReader
can then be retrieved from the DataTransformationConnection.
(Inherited from DataTransformation.) | |
ConnectCore | Connect to the input reader, a DataRowReader
can then be retrieved from the DataTransformationConnection.
(Inherited from DataTransformation.) | |
Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) | |
GenerateDataHistoryCore |
Create detail information for the DataTransformation.
See DataHistoryBuilder for more information on
how to add detailed information to the data history.
(Inherited from DataTransformation.) | |
GetType | Gets the Type of the current instance. (Inherited from Object.) | |
MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
Properties
Name | Description | |
---|---|---|
ColumnAdditions |
Gets the collection of operations that represents added columns.
| |
ColumnNameSymbol |
Use this in expressions and/or names to refer to the columns in a selection that this shall be applied to.
| |
ColumnRemovals |
Gets the collection of operations that represents removed columns.
| |
ColumnReplacements |
Gets the collection of operations that represents replaced columns.
| |
LoadReport | Gets the PartialDataLoadReport that can be used to
report errors during connection.
(Inherited from DataTransformation.) | |
Name | Gets the display name of the transformation.
(Inherited from DataTransformation.) | |
TypeId | Gets the type identifier for the data source.
(Inherited from DataTransformation.) |
Version Information
See Also