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I am trying to write a CQ with MODIFY statement that replaces all “Not Available” to NULL but I am getting an error “Left expression do not refer to an object”. Please refer to the screenshot for reference.

 

Modify function needs WAEvent as output stream.

SELECT * FROM OracleOutputStream; creates a typed/user-defined event

SELECT d FROM OracleOutputStream d; creates a WAEvent

Using * instead of an alias creates a user-defined event. Hence, there is an error in saving the component.

This helped, thanks! Where could I find description of this behaviour in documentation?

You can find a doc article on Striim’s MODIFY operator here:

https://striim.com/docs/en/modifying-and-masking-values-in-the-waevent-data-array-using-modify.html

 

I meant the difference between aliased and unaliased SELECT. One producing WAEvent, the other not

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