Remove item:

< * Allow star join optimizations < < While our bitmap scan allows multiple indexes to be joined to get < to heap rows, a star joins allows multiple dimension _tables_ to < be joined to index into a larger main fact table. The join is < usually performed by either creating a cartesian product of all < the dimmension tables and doing a single join on that product or < using subselects to create bitmaps of each dimmension table match < and merge the bitmaps to perform the join on the fact table. Some < of these algorithms might be patented.

Remove item:
< * Allow star join optimizations < < While our bitmap scan allows multiple indexes to be joined to get < to heap rows, a star joins allows multiple dimension _tables_ to < be joined to index into a larger main fact table. The join is < usually performed by either creating a cartesian product of all < the dimmension tables and doing a single join on that product or < using subselects to create bitmaps of each dimmension table match < and merge the bitmaps to perform the join on the fact table. Some < of these algorithms might be patented.
25af534e · Bruce Momjian · 3282b633 · 25af534e · 25af534e
隐藏空白更改
内联并排

Showing with 2 addition and 22 deletion

doc/TODO doc/TODO +1 -11

doc/src/FAQ/TODO.html doc/src/FAQ/TODO.html +1 -11

未找到文件。
--- a/doc/TODO
+++ b/doc/TODO
@@ -2,7 +2,7 @@
 PostgreSQL TODO List
 ====================
 Current maintainer:	Bruce Momjian (pgman@candle.pha.pa.us)
-Last updated:		Sat Dec 17 13:06:57 EST 2005
+Last updated:		Sat Dec 17 14:03:20 EST 2005

 The most recent version of this document can be viewed at
 http://www.postgresql.org/docs/faqs.TODO.html.
@@ -1029,16 +1029,6 @@ Optimizer / Executor

 * Log statements where the optimizer row estimates were dramatically
  different from the number of rows actually found?
-* Allow star join optimizations
-
-  While our bitmap scan allows multiple indexes to be joined to get
-  to heap rows, a star joins allows multiple dimension _tables_ to 
-  be joined to index into a larger main fact table.  The join is
-  usually performed by either creating a cartesian product of all
-  the dimmension tables and doing a single join on that product or
-  using subselects to create bitmaps of each dimmension table match
-  and merge the bitmaps to perform the join on the fact table.  Some
-  of these algorithms might be patented.


 Miscellaneous Performance

--- a/doc/src/FAQ/TODO.html
+++ b/doc/src/FAQ/TODO.html
@@ -8,7 +8,7 @@
 <body bgcolor="#FFFFFF" text="#000000" link="#FF0000" vlink="#A00000" alink="#0000FF">
 <h1><a name="section_1">PostgreSQL TODO List</a></h1>
 <p>Current maintainer:     Bruce Momjian (<a href="mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</a>)<br/>
-Last updated:           Sat Dec 17 13:06:57 EST 2005
+Last updated:           Sat Dec 17 14:03:20 EST 2005
 </p>
 <p>The most recent version of this document can be viewed at<br/>
 <a href="http://www.postgresql.org/docs/faqs.TODO.html">http://www.postgresql.org/docs/faqs.TODO.html</a>.
@@ -934,16 +934,6 @@ first.
 </p>
  </li><li>Log statements where the optimizer row estimates were dramatically
  different from the number of rows actually found?
-  </li><li>Allow star join optimizations
-<p>  While our bitmap scan allows multiple indexes to be joined to get
-  to heap rows, a star joins allows multiple dimension _tables_ to 
-  be joined to index into a larger main fact table.  The join is
-  usually performed by either creating a cartesian product of all
-  the dimmension tables and doing a single join on that product or
-  using subselects to create bitmaps of each dimmension table match
-  and merge the bitmaps to perform the join on the fact table.  Some
-  of these algorithms might be patented.
-</p>
 </li></ul>
 <h1><a name="section_21">Miscellaneous Performance</a></h1>