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Document that "Q" is ignored by to_date and to_timestamp. Add C comment

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about the behavior.

Document that quotes in to_date, to_timestamp, to_number skip input
characters.
This commit is contained in:
Bruce Momjian
2010-03-03 22:28:42 +00:00
parent 61d75116a7
commit ea066f87c3
2 changed files with 12 additions and 7 deletions
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9
doc/src/sgml/func.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.506 2010/02/23 16:14:25 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.507 2010/03/03 22:28:42 momjian Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
@ -5089,7 +5089,7 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
</row>
<row>
<entry><literal>Q</literal></entry>
<entry>quarter</entry>
<entry>quarter (ignored by <function>to_date</> and <function>to_timestamp</>)</entry>
</row>
<row>
<entry><literal>RM</literal></entry>
@ -5209,7 +5209,10 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
even if it contains pattern key words. For example, in
<literal>'"Hello Year "YYYY'</literal>, the <literal>YYYY</literal>
will be replaced by the year data, but the single <literal>Y</literal> in <literal>Year</literal>
will not be.
will not be. In <function>to_date</>, <function>to_number</>,
and <function>to_timestamp</>, double-quoted strings skip the number of
input characters contained in the string, e.g. <literal>"XX"</>
skips two input characters.
</para>
</listitem>