The problem of top parameterization for SQL parameterization in Patepoco

SQL parameterization in Patepoco is handled directly with the @+ parameter name, but the following statement is used to make an error.

SELECT    TOP @num    *  from     TableA

Execution throws an exception, according to the error prompted for a long time did not find the reason, finally had to turn to Google

A search on the answer, it makes me vomit blood (unexpectedly is to add a parenthesis!!!) ), the following is the correct wording

SELECT    TOP (@num)     *  from     TableA

The problem of top parameterization for SQL parameterization in Patepoco