Add items:

> * Prevent to_char() on interval from returning meaningless values > > For example, to_char('1 month', 'mon') is meaningless. Basically, > most date-related parameters to to_char() are meaningless for > intervals because interval is not anchored to a date. > > * Allow to_char() on interval values to accumulate the highest unit > requested > > o to_char(INTERVAL '1 hour 5 minutes', 'MI') => 65 > o to_char(INTERVAL '43 hours 20 minutes', 'MI' ) => 2600 > o to_char(INTERVAL '43 hours 20 minutes', 'WK:DD:HR:MI') => 0:1:19:20 > o to_char(INTERVAL '3 years 5 months','MM') => 41 > > Some special format flag would be required to request such > accumulation. Such functionality could also be added to EXTRACT. > Prevent accumulation that crosses the month/day boundary because of > the uneven number of days in a month. >

Add items:
> * Prevent to_char() on interval from returning meaningless values > > For example, to_char('1 month', 'mon') is meaningless. Basically, > most date-related parameters to to_char() are meaningless for > intervals because interval is not anchored to a date. > > * Allow to_char() on interval values to accumulate the highest unit > requested > > o to_char(INTERVAL '1 hour 5 minutes', 'MI') => 65 > o to_char(INTERVAL '43 hours 20 minutes', 'MI' ) => 2600 > o to_char(INTERVAL '43 hours 20 minutes', 'WK:DD:HR:MI') => 0:1:19:20 > o to_char(INTERVAL '3 years 5 months','MM') => 41 > > Some special format flag would be required to request such > accumulation. Such functionality could also be added to EXTRACT. > Prevent accumulation that crosses the month/day boundary because of > the uneven number of days in a month. >
5894e7e3 · Bruce Momjian · b63990c6 · 5894e7e3 · 5894e7e3
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Showing with 42 addition and 3 deletion

doc/TODO doc/TODO +20 -1

doc/src/FAQ/TODO.html doc/src/FAQ/TODO.html +22 -2

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:		Mon May  2 14:27:06 EDT 2005
+Last updated:		Sat May  7 00:24:29 EDT 2005

 The most recent version of this document can be viewed at
 http://www.postgresql.org/docs/faqs.TODO.html.
@@ -188,6 +188,25 @@ Data Types
  zero the bits
 * Prevent INET cast to CIDR from droping netmask, SELECT '1.1.1.1'::inet::cidr
 * Add 'tid != tid ' operator for use in corruption recovery
+* Prevent to_char() on interval from returning meaningless values
+
+  For example, to_char('1 month', 'mon') is meaningless.  Basically,
+  most date-related parameters to to_char() are meaningless for
+  intervals because interval is not anchored to a date.
+
+* Allow to_char() on interval values to accumulate the highest unit
+  requested
+
+	o to_char(INTERVAL '1 hour 5 minutes', 'MI') => 65
+	o to_char(INTERVAL '43 hours 20 minutes', 'MI' ) => 2600 
+	o to_char(INTERVAL '43 hours 20 minutes', 'WK:DD:HR:MI') => 0:1:19:20
+	o to_char(INTERVAL '3 years 5 months','MM') => 41
+
+  Some special format flag would be required to request such
+  accumulation.  Such functionality could also be added to EXTRACT. 
+  Prevent accumulation that crosses the month/day boundary because of
+  the uneven number of days in a month.
+
 * Add ISO INTERVAL handling
 	o Add support for day-time syntax, INTERVAL '1 2:03:04' DAY TO SECOND
 	o Add support for year-month syntax, INTERVAL '50-6' YEAR TO MONTH

--- 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:           Mon May  2 14:27:06 EDT 2005
+Last updated:           Sat May  7 00:24:29 EDT 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>.
@@ -176,7 +176,27 @@ first.
  zero the bits
  </li><li>Prevent INET cast to CIDR from droping netmask, SELECT '<a href="telnet://1.1.1.1">1.1.1.1</a>'::inet::cidr
  </li><li>Add 'tid != tid ' operator for use in corruption recovery
-  </li><li>Add ISO INTERVAL handling
+  </li><li>Prevent to_char() on interval from returning meaningless values
+<p>  For example, to_char('1 month', 'mon') is meaningless.  Basically,
+  most date-related parameters to to_char() are meaningless for
+  intervals because interval is not anchored to a date.
+</p>
+  </li><li>Allow to_char() on interval values to accumulate the highest unit
+  requested
+  <ul>
+    <li>to_char(INTERVAL '1 hour 5 minutes', 'MI') =&gt; 65
+    </li><li>to_char(INTERVAL '43 hours 20 minutes', 'MI' ) =&gt; 2600 
+    </li><li>to_char(INTERVAL '43 hours 20 minutes', 'WK:DD:HR:MI') =&gt; 0:1:19:20
+    </li><li>to_char(INTERVAL '3 years 5 months','MM') =&gt; 41
+  </li></ul>
+</li></ul>
+<p>  Some special format flag would be required to request such<br/>
+  accumulation.  Such functionality could also be added to EXTRACT. <br/>
+  Prevent accumulation that crosses the month/day boundary because of<br/>
+  the uneven number of days in a month.
+</p>
+<ul>
+  <li>Add ISO INTERVAL handling
  <ul>
    <li>Add support for day-time syntax, INTERVAL '1 2:03:04' DAY TO SECOND
    </li><li>Add support for year-month syntax, INTERVAL '50-6' YEAR TO MONTH