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Commitbbb2e21

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I was recently surprised to find that EXTRACT's day of the week
numbering is different than TO_CHAR's ditto. EXTRACT starts at 0==Sundaywhile TO_CHAR starts at 1==Sunday.A suggestion for two documentation notes is attached as a patch tocurrent CVS HEAD.Troels Arvin
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‎doc/src/sgml/func.sgml

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@@ -1,5 +1,5 @@
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<!--
2-
$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.230 2004/12/13 18:05:08 petere Exp $
2+
$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.231 2004/12/21 01:02:28 momjian Exp $
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PostgreSQL documentation
44
-->
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@@ -4412,6 +4412,13 @@ substring('foobar' from 'o(.)b') <lineannotation>o</lineannotation>
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1230 microseconds = 2.021230 seconds.
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</para>
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</listitem>
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<listitem>
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<para><function>to_char</function>'s day of the week numbering
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(see the 'D' formatting pattern) is different from that of the
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<function>extract</function> function.
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</para>
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</listitem>
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</itemizedlist>
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</para>
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@@ -5146,6 +5153,11 @@ SELECT EXTRACT(DECADE FROM TIMESTAMP '2001-02-16 20:38:40');
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SELECT EXTRACT(DOW FROM TIMESTAMP '2001-02-16 20:38:40');
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<lineannotation>Result: </lineannotation><computeroutput>5</computeroutput>
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</screen>
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<para>
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Note that <function>extract</function>'s day of the week numbering is
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different from that of the <function>to_char</function> function.
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</para>
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</listitem>
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</varlistentry>
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