问题
When traversing a Dacpac via C# code, I am able to figure out which columns are referenced in a computed column (GetReferenced(Microsoft.SqlServer.Dac.Model.Column.ExpressionDependencies)), and what the expression for the column is (Microsoft.SqlServer.Dac.Model.Column.Expression property). What I cannot find, is the datatype of the computed column.
Besides that, I also cannot find a way to retrieve the columns of a FileTable table (although this is a static set of columns).
Search engines won't bring me far; there aren't that many resource to be found on this topic.
回答1:
I have blogged here how to get the data type of columns:
http://sqlserverfunctions.wordpress.com/category/dacfx-2/
I haven't tried it on computed columns.
To get columns for a file table, follow the blog but replace Table.Columns ModelRelationshipClass with FileTable.Columns ModelRelationshipClass.
Ed
来源：https://stackoverflow.com/questions/27259640/get-datatype-of-computed-column-from-dacpac