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`2`	`2`	`PostgreSQL TODO List`
`3`	`3`	`====================`
`4`	`4`	`Current maintainer:Bruce Momjian (bruce@momjian.us)`
`5`		`-Last updated:Sat Oct21 13:31:12 EDT 2006`
	`5`	`+Last updated:Mon Oct23 22:41:16 EDT 2006`
`6`	`6`
`7`	`7`	`The most recent version of this document can be viewed at`
`8`	`8`	`http://www.postgresql.org/docs/faqs.TODO.html.`
`@@ -960,6 +960,7 @@ Cache Usage`
`960`	`960`	`get a count directly from a unique index, but for this to be`
`961`	`961`	`faster than a sequential scan it must avoid access to the heap`
`962`	`962`	`to obtain tuple visibility information.`
	`963`	`+ http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php`
`963`	`964`
`964`	`965`	`* Add estimated_count() to return an estimate of COUNT()`
`965`	`966`

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`@@ -8,7 +8,7 @@`
`8`	`8`	`<bodybgcolor="#FFFFFF"text="#000000"link="#FF0000"vlink="#A00000"alink="#0000FF">`
`9`	`9`	`<h1><aname="section_1">PostgreSQL TODO List</a></h1>`
`10`	`10`	`<p>Current maintainer: Bruce Momjian (<ahref="mailto:bruce@momjian.us">bruce@momjian.us</a>)<br/>`
`11`		`-Last updated:Sat Oct21 13:31:12 EDT 2006`
	`11`	`+Last updated:Mon Oct23 22:41:16 EDT 2006`
`12`	`12`	`</p>`
`13`	`13`	`<p>The most recent version of this document can be viewed at<br/>`
`14`	`14`	`<ahref="http://www.postgresql.org/docs/faqs.TODO.html">http://www.postgresql.org/docs/faqs.TODO.html</a>.`
`@@ -867,6 +867,7 @@ <h1><a name="section_14">Cache Usage</a></h1>`
`867`	`867`	`get a count directly from a unique index, but for this to be`
`868`	`868`	`faster than a sequential scan it must avoid access to the heap`
`869`	`869`	`to obtain tuple visibility information.`
	`870`	`+<ahref="http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php">http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php</a>`
`870`	`871`	`</p>`
`871`	`872`	`</li><li>Add estimated_count() to return an estimate of COUNT()`
`872`	`873`	`<p> This would use the planner ANALYZE statistics to return an estimated`

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