a code question - Mailing list pgsql-bugs

From qiumingcheng
Subject a code question
Date
Msg-id 23f5a017-0515-4861-b1ae-9175e4af1194.qiumingcheng@aliyun.com
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Responses Re: a code question
List pgsql-bugs
Hello, 
When I read the code, the following code may be wrong, please help to confirm:at following 1, why the calculation of the pointer is calculated twice, thank you very much.
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