On 08/07/2012 09:45 PM, Kevin Grittner wrote:
I also think it's a problem that one can get through the entire
"Concurrency Control" chapter (mvcc.sgml) without a clue that
sequences aren't transactional.
I'm also wondering about adding something like the following summary of
features with odd transactional behaviour. I'm sure there's more than
I've listed, but nothing is jumping out at me.
<sect1 id="mvcc-exceptions">
<title>Exceptions to normal transactional rules</title>
<para>
Some PostgreSQL features, functions and data types differ from the
usual transactional behaviour described in this chapter. Differences
are generally mentioned in the documentation sections for the
features they affect. Such exceptions are collected here for
easy reference.
</para>
<itemizedlist>
<listitem>
<para>
Serial pseudo-types <xref linkend="datatype-serial">
</para>
</listitem>
<listitem>
<para>
<literal>SEQUENCE</literal>s - <xref linkend="functions-sequence">
</para>
</listitem>
<listitem>
<para>
Advisory locks - <xref linkend="advisory-locks">
</para>
</listitem>
<listitem>
<para>
Disk I/O to files outside the database, as performed by
<literal>COPY ... TO</literal>, adminpack functions, and other
add-ons. See <xref linkend="sql-copy">,
<xref linkend="adminpack">.
</para>
</listitem>
</itemizedlist>
</sect1>
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