Task Factory Advanced Derived Column Transform

Advanced Derived Column Transform

Transform IconTransform Description
Task Factory Advanced Derive Column Transform IconThe Advanced Derive Column Transform is used to create columns in an SSIS data flow using columns, variables, and expressions.

Task Factory Derived Column Transform General

Column Browser

Task Factory Advanced Derived Column Transform Column Browser

Located on the left hand side, the column browser window shows you all the available columns, variables and connections that can be used as part of a derived column expression. Selecting a plus sign next to a group in the tree view expands that group of items. Any item from the column browser can be dragged into an expression in the column grid below.

Functions Browser

Task Factory Advanced Derived Column Transform Functions Browser

Located on the right hand side, the functions browser window lists all of the available functions that can be used in the advanced derived column (as well as any of the expressions based tasks). All functions are grouped into an appropriate group (e.g. Character, Data Cleansing) based on what the function either does or returns. For instance, the character function Left is listed under the Character group because it performs operations on a set of characters or a string. Selecting a function gives you a description, syntax overview, and examples on how to use the function. 

Available Functions List

For a list of all available functions, along with syntax, descriptions, and examples, see the Functions List page.

Columns Grid

The Columns Grid (the bottom window)  allows you to define the new derived column, replace columns, and setup variable expression columns that can be used in other column expressions.

General Tab

General Tab

Task Factory Advaned Derived Column Transform Columns Grid General tab

ColumnDescription
NameThe name of the column or expression.
ActionThe action this column performs.

  • Variable Expression - This option creates a reusable expression that can be used in the expression column of the current column or other columns in the grid.
  • Add As New Column - This creates a new derived column based on the expression.
  • Replace Column - This replaces an input column's data with the result of the expression.
ExpressionThis is the expression used to perform the action from the action column.
Data TypeThe data type for the current column.
LengthThe length of the current column.
PrecisionThe precision of the current column.
ScaleThe scale of the current column.
CodePageThe code page of the current column.
Advanced Tab

Advanced Tab

Task Factory Advanced Derived Column Transform Columns Grid Advanced tab

OptionDescription
On TruncationAction to take when a truncation occurs.
On ErrorAction to take when an error occurs.
Max Errors to IgnoreHow any errors to ignore before failing component.
Max WarningsMaximum number of warnings you want to show in the execution log when you have errors or data truncation.

Validate All Button

The Validate All button evaluates all of the expressions and checks if they have errors. An error or warning icon displays if there are any issues with the expressions.

Test Expression (Using Placeholder Values) Button

This button creates temporary values based on the data type and execute the expression that is currently selected in the grid. 

Note:  To test the expression by entering your own values use the expression editor.