USP_SCHEMA_TABLE_CLEARCOLUMNEXPRESSION

CREATE procedure [dbo].[USP_SCHEMA_TABLE_CLEARCOLUMNEXPRESSION]

@TABLENAME [nvarchar](128),
@COLUMNNAME [nvarchar](128)

with execute as caller

as

if exists (
        select ep.value 
        from sys.extended_properties as ep
        inner join sys.columns as c on c.object_id=ep.major_id and c.column_id=ep.minor_id
          where 
          ep.class=1
          and
          ep.major_id=OBJECT_ID(@TABLENAME,'U')
          and 
          ep.minor_id > 0
          and
          ep.[name] = N'BB_COLUMNEXPRESSION'
          and 
          c.[name]=@COLUMNNAME
        ) 
        exec sp_dropextendedproperty N'BB_COLUMNEXPRESSION', N'SCHEMA', N'dbo', N'table', @TABLENAME, N'COLUMN', @COLUMNNAME;