Selecting a user-defined scalar function that takes as a parameter another field
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Published on 2010-03-26T22:48:02Z
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2010/03/26
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I have a table a with a list of id's, and a user-defined function foo(id) that takes the id and returns a VARCHAR(20).
What I am trying to do is:
SELECT
id,
foo(id) AS 'text field'
FROM a
However, instead of calling the function for each ID number, like I desired, the text comes back the same for every row. I have tested the foo() function manually with the returned ID's and it does not have that problem, so I realize I must not understand something about the evaluation of the query.
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