What does ER_WARN_FIELD_RESOLVED mean?

Posted by VolkerK on Stack Overflow See other posts from Stack Overflow or by VolkerK
Published on 2009-04-20T14:36:22Z Indexed on 2010/03/30 4:23 UTC
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mysql

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optimization

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database

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database-design

When SHOW WARNINGS after a EXPLAIN EXTENDED shows a

Note 1276 Field or reference 'test.foo.bar' of SELECT #2 was resolved in SELECT #1

what exactly does that mean and what impact does it have? In my case it prevents mysql from using what seems to be a perfectly good index. But it's not about fixing that specific query (as it is an irrelevant test).

I found http://dev.mysql.com/doc/refman/5.0/en/error-messages-server.html but

Error: 1276 SQLSTATE: HY000 (ER_WARN_FIELD_RESOLVED)
Message: Field or reference '%s%s%s%s%s' of SELECT #%d was resolved in SELECT #%d

isn't much of an explaination.

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