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Re: Regex: Identifying comments

by pvaldes (Chaplain)
on Aug 30, 2012 at 10:06 UTC ( #990708=note: print w/ replies, xml ) Need Help??


in reply to Regex: Identifying comments

The comments in a sql file will be probably either at the start of the line with or without white spaces "^\s*--" or after a semicolon "\;\s*--". If I'm not wrong, this is not a valid sql sentence in most databases, thus you shouldn't have it:

select '--foo' from mytable --bar

(And you shouldn't have tables with name fields beginning by "--")

Something like this should be enough to strip all comments from your file:

open my ORIGINALFILE, '<', 'file.sql' or die... etc open my CLEANEDFILE, '>', outfile... etc, as usual while (<ORIGINALFILE>){ next if /^\s*--.*$/ ; s/\;\s*--.*$/;/ ; print CLEANEDFILE $_ ; }

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