Each Embedded SQL statement generates one comment and a few lines of Pascal code. You may find that the preprocessor translates 50 lines of Embedded SQL into 200 lines of Pascal. This can confuse the program developer who is trying to debug the original source code. To facilitate debugging, each group of Pascal statements associated with a particular statement is preceded by a comment corresponding to the original Embedded SQL source. (Note that only executable Embedded SQL statements are preceded by a comment.) Each comment is one line long and informs the reader of the file name, line number, and type of statement in the original source file.

One consequence of the generated comment is that you cannot comment out embedded statements by putting the opening comment delimiter on an earlier line. You have to put the delimiter on the same line, before the exec keyword, to cause the preprocessor to treat the complete statement as a Pascal comment.