A comment is a character string that serves as documentation in a program. Comments are not executable. Any line in a PDL program can contain a comment. A line that begins with : or ‑‑ is treated as a comment.
: text of comment -- text of comment
: (colon) All characters to the right are treated as a comment. You cannot use the colon for comments in embedded SQL.
-- (double hyphens) All characters to the right are treated as a comment.
Because the comment ends at the end of the line, no special character is required to terminate the comment.
Example
: this is regarded as a comment. SET A = B + C : this is regarded as a comment, SET D = A + 1 ‑‑ and this, too, but not the SETs
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