How can i get record by data block not by sql? - Mailing list pgsql-performance

From 姜头
Subject How can i get record by data block not by sql?
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Msg-id tencent_6444418214D9B3A92066BAA7@qq.com
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Responses Re: How can i get record by data block not by sql?  (Ben Chobot <bench@silentmedia.com>)
List pgsql-performance
How can i get record by data block not by sql?
 
I want to read and write lots of data by data blocks and write record to a appointed data block and read it.
so i can form a disk-resident tree by recording the block address. But i don't know  how to implement in postgresql.
Is there system function can do this? 
Can someone help me?? Thank you very very much!!!!1

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