When I run the SQL you posted, I don't get that error at all. Instead I get complaints that the objects in bold (fragment of your assignment to @SQL) don't exist:
ParentFeatureName + CHAR(39) + ' Then ChilFeatureName Else ' + CHAR(39) + CHAR(39) + ' End) As ' + ParentFeatureName
From #Test
Neither the column name nor the referenced table are provided in the DDL.
Then of course there's the question of "what do you think you're assigning to @product?" It starts with an open paren. Is that supposed to be a subquery or something?
My thought question: Have you ever been told that your query runs too fast?
My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.
Need to UNPIVOT? Why not CROSS APPLY VALUES instead?[/url]
Since random numbers are too important to be left to chance, let's generate some![/url]
Learn to understand recursive CTEs by example.[/url]
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