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create table foo( --tabel foo bar text, --fld name boo text --again );

mmh... this is an interesting example, Yes. Perfectly legitim third type of comments, and difficult to debug with a regex... maybe you can profit that the fact that the type of data are limited with something like:

m/(\(|text|int|integer|char \(\d+\)),*\s*--(.*)$/

select '--foo';

This is not a very probable situation, but certainly is possible too. In any case this false comment is not after a semicolon, nor at the beginning of the line or inside a table, so if there are a ^\s*select in the same line you probably could safely ignore it. But then you could have something like this:

select field from mytable where field = 'text, --foo important information here about to be lost';

The safest actitude (although maybe a little paranoic) should be to isolate and examinate personally any case so special, the idea is: "if you found two - after a ' or a " and before a ";" in a line having the string "select" I want to see it personally"

You can improve your regex if you check previously for troublesome data:

select * from mitable where field1 like '%--%' or field2 like '%--%' or field3 like '%--%'... etc ;

In reply to Re^4: Regex: Identifying comments by pvaldes
in thread Regex: Identifying comments by zuma53

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