mysql queries - performance loss by putting numbers in quotes?

Posted by Haroldo on Stack Overflow See other posts from Stack Overflow or by Haroldo
Published on 2010-06-16T10:32:22Z Indexed on 2010/06/16 11:52 UTC
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If a variable will always be a number, is there a performace loss by putting it in inverted commas?

for example

"SELECT prod.product_name FROM prod WHERE prod.id = '$id'";

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