Re: What is Tid Scan - Mailing list pgsql-hackers

From Hannu Krosing
Subject Re: What is Tid Scan
Date
Msg-id 1031147457.3339.12.camel@taru.tm.ee
Whole thread Raw
In response to What is Tid Scan  (ljguo_1234 <ljguo_1234@sina.com>)
List pgsql-hackers
On Wed, 2002-09-04 at 12:43, ljguo_1234 wrote:
> Hello everyone.
>     I can't understand Tid Scan, Who can tell me what it's that and where I could find document on the Web. Thanks
foryour reponse.
 

It is scanning table by TupleID's. A tuple id is a 6-byte entity which
consists of 4-byte page number and 2-byte tuple index inside page.

So if you know the TID you can directly get the corresponding tuple.

--------------
Hannu



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