sql - How to get only column names as the following sample? -


currently, have string of column names below (this string computed in stored pro, , column name got several tables):

@str = 'select fieldname1, fieldname2, fieldname3'

in stored, how can return datatable no data , @str list of column name? tried query that:

exec (@str)

but requires table it. don't want put table because query data, , take long time finish.

put 'null' in front of each column name, in:

select null fieldname1, null fieldname2, null fieldname3

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