问题
Essentially I a SSIS pkg with an Execute SQL statement that dynamically writes a REPLACE function based on some table values. (ie REPLACE(REPLACE(Col1,"*","",),"@@@","")
ExecuteSQL result is put to variable @Cleanse
In my Derived Column conversion Im trying to call @User::Cleanse as an expression in to replace the Value of the Col1 from the DataFlow.
The result appears to be pulling the result of @Cleanse and using it as a string value rather than applying it as the REPLACE function.
When Debugging the @Cleanse value appear to be putting \ in the string, which I dont think should matter as it seems to be appliying this to other values without a problem
The result is that when running out to the CSV this is putting
"REPLACE(REPLACE(Col1" in Col1
"*" in Col2
) in Col3 etc etc
How can I get the Derived column transformation to 'see' the variable as the function, not a string value?
Many thanks in advance
回答1:
Set the EvaluateAsExpression property of the variable to True.
However, binding variables as parameters to an SQL query using the Variable Mappings pane of the Execute SQL task might be a better solution
来源：https://stackoverflow.com/questions/11433369/using-variable-as-expression-in-derived-column-transformation-ssis