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Improve extract(day) documentation with interval values.

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This commit is contained in:
Bruce Momjian 2011-03-11 08:17:49 -05:00
parent ea5c4c71f6
commit cbd2811461
1 changed files with 9 additions and 2 deletions
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11
doc/src/sgml/func.sgml
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@ -6605,13 +6605,20 @@ SELECT EXTRACT(CENTURY FROM TIMESTAMP '2001-02-16 20:38:40');
<term><literal>day</literal></term> <term><literal>day</literal></term>
<listitem> <listitem>
<para> <para>
The day (of the month) field (1 - 31) For <type>timestamp</type> values, the day (of the month) field
(1 - 31) ; for <type>interval</type> values, the number of days
</para> </para>
<screen> <screen>
SELECT EXTRACT(DAY FROM TIMESTAMP '2001-02-16 20:38:40'); SELECT EXTRACT(DAY FROM TIMESTAMP '2001-02-16 20:38:40');
<lineannotation>Result: </lineannotation><computeroutput>16</computeroutput> <lineannotation>Result: </lineannotation><computeroutput>16</computeroutput>
SELECT EXTRACT(DAY FROM INTERVAL '40 days 1 minute');
<lineannotation>Result: </lineannotation><computeroutput>40</computeroutput>
</screen> </screen>
</listitem> </listitem>
</varlistentry> </varlistentry>
@ -6827,7 +6834,7 @@ SELECT EXTRACT(MINUTE FROM TIMESTAMP '2001-02-16 20:38:40');
<listitem> <listitem>
<para> <para>
For <type>timestamp</type> values, the number of the month For <type>timestamp</type> values, the number of the month
within the year (1 - 12) ; for <type>interval</type> values within the year (1 - 12) ; for <type>interval</type> values,
the number of months, modulo 12 (0 - 11) the number of months, modulo 12 (0 - 11)
</para> </para>