The cells in the right column of the table shown in figure 4.5 have different leading or padding. Observe that the default leading of the content of a cell in text mode is equal to the font size. Internally, the leading is set like this: This is different from the default leading of a Phrase object outside a PdfPCell.
There can be a lot of differences between a UDF and stored procedure, as the prior link has shown. Another difference is the UDF can be directly selected from, whereas a stored procedure requires one to insert the results into a tempory table or table variable.
A stored procedure that is automatically executed operates with the same permissions as members of the sysadmin fixed server role. Any error messages generated by the stored procedure are written to the SQL Server error log. Do not return any result sets from a stored procedure that is executed automatically. Because the stored procedure is being executed by SQL Server rather than a user, there is nowhere for the result sets to go. Execution of the stored procedures starts when the master database is recovered at startup.