“Incorrect syntax” using a table-valued function in SELECT clause of T-SQL query

Question

I have the following table-valued function for splitting strings. This works fine, was cribbed from elsewhere on the web, and I would have thought isn\'t the cause of the pr

Answer 1

I would guess that the database is set to compatibility mode 80 or lower.

See sp_dbcmptlevel

This is usually the cause if it happens in a FROM clause

You can also write it like this

SELECT
  a.doc_id,
  a.doc_file_name,
  foo.extension 
FROM
  ai_docs_core a
  OUTER APPLY
  (SELECT TOP 1 s AS extension
   FROM dbo.StringSplit('.', a.doc_file_name)
   ORDER BY pn DESC
  ) foo