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regex in query

regex in query

regex in query

I have a table of members for a small website, it was hit pretty hard by spammers recently. I've noticed that many (but not all) of the spammer email addresses have 3 or more groups after the '@' character, like these:
I'm trying to run a query to select these email addresses for further scrutiny. The regex runs correctly when I check it with rubular or regex hero, but when run against the database, it matches all the addresses. Here is the regex:
@([0-9 a-z]+\.){2,}[0-9 a-z]+

and here is the full query:
SELECT * FROM 'members' WHERE 'email' REGEXP '@([0-9 a-z]+\.){2,}[0-9 a-z]+';

MySQL database version 5.1.73 and the server is using utf8 codeset.

Is there an error in my regex or perhaps a database setting that needs to be changed? I have run other queries with simple regex with no problems.

RE: regex in query


Ask MySQL how is he seeing that regular expression :


test> SELECT '@([0-9 a-z]+\.){2,}[0-9 a-z]+';
| @([0-9 a-z]+.){2,}[0-9 a-z]+ |
| @([0-9 a-z]+.){2,}[0-9 a-z]+ |
1 row in set (0.00 sec) 
See ? The escaping of the dot vanished as it was treated like a misplaced string escaping. You have to escape the backslash to survive the string parsing and reach the regular expression parsing phase :


SELECT * FROM 'members' WHERE 'email' REGEXP '@([0-9 a-z]+\\.){2,}[0-9 a-z]+'; 


RE: regex in query

Thank you! worked as expected.

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