MySQL has a very nasty comment syntax, it can either be a # all the way up to the end of the line, a double hyphen followed by a space all the way up to the end of the line, or a /* up to either a semicolon or a */, except when either of them is inside a single or double quoted string.

Here's a regex to actually match such a comment (will be in Regexp::Common version 0.03).

(?:#|-- )[^\n]*\n|/\*(?:(?>[^*;"']+)|"[^"]*"|'[^']*'|\*(?!/))*(?:;|\*/
+)

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In reply to MySQL comments. by Abigail-II

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