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Add missing HOUR TO SECOND option to list of possible INTERVAL field sets,

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as noted by Sebastien Flaesch.  Also update the claim that we simply throw
away fields outside this set --- that got changed later to only discard
less-significant fields.
This commit is contained in:
Tom Lane 2009-07-08 17:21:55 +00:00
parent df20667112
commit 53e7229258
1 changed files with 10 additions and 6 deletions
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16
doc/src/sgml/datatype.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/datatype.sgml,v 1.239 2009/06/17 21:58:49 tgl Exp $ --> <!-- $PostgreSQL: pgsql/doc/src/sgml/datatype.sgml,v 1.240 2009/07/08 17:21:55 tgl Exp $ -->
<chapter id="datatype"> <chapter id="datatype">
<title id="datatype-title">Data Types</title> <title id="datatype-title">Data Types</title>
@ -1524,11 +1524,11 @@ SELECT b, char_length(b) FROM test2;
DAY TO MINUTE DAY TO MINUTE
DAY TO SECOND DAY TO SECOND
HOUR TO MINUTE HOUR TO MINUTE
HOUR TO SECOND
MINUTE TO SECOND MINUTE TO SECOND
</programlisting> </programlisting>
Input falling outside the specified set of fields is silently discarded.
Note that if both <replaceable>fields</replaceable> and Note that if both <replaceable>fields</replaceable> and
<replaceable>precision</replaceable> are specified, the <replaceable>p</replaceable> are specified, the
<replaceable>fields</replaceable> must include <literal>SECOND</>, <replaceable>fields</replaceable> must include <literal>SECOND</>,
since the precision applies only to the seconds. since the precision applies only to the seconds.
</para> </para>
@ -2468,11 +2468,15 @@ P <optional> <replaceable>years</>-<replaceable>months</>-<replaceable>days</> <
<para> <para>
When writing an interval constant with a <replaceable>fields</> When writing an interval constant with a <replaceable>fields</>
specification, or when assigning to an interval column that was defined specification, or when assigning a string to an interval column that was
with a <replaceable>fields</> specification, the interpretation of defined with a <replaceable>fields</> specification, the interpretation of
unmarked quantities depends on the <replaceable>fields</>. For unmarked quantities depends on the <replaceable>fields</>. For
example <literal>INTERVAL '1' YEAR</> is read as 1 year, whereas example <literal>INTERVAL '1' YEAR</> is read as 1 year, whereas
<literal>INTERVAL '1'</> means 1 second. <literal>INTERVAL '1'</> means 1 second. Also, field values
<quote>to the right</> of the least significant field allowed by the
<replaceable>fields</> specification are silently discarded. For
example, writing <literal>INTERVAL '1 day 2:03:04' HOUR TO MINUTE</>
results in dropping the seconds field, but not the day field.
</para> </para>
<para> <para>