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Add a note to the MVCC chapter that some things aren't transactional.

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Craig Ringer, slightly edited by me.
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Robert Haas 2012-08-21 11:08:15 -04:00
parent 71450d7fd6
commit 82ef3d3008
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doc/src/sgml/mvcc.sgml
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@ -260,6 +260,18 @@
command <xref linkend="sql-set-transaction">.
</para>
<important>
<para>
Some <productname>PostgreSQL</productname> data types and functions have
special rules regarding transactional behaviour. In particular, changes
made to a <literal>SEQUENCE</literal> (and therefore the counter of a
column declared using <literal>SERIAL</literal>) are immediately visible
to all other transactions and are not rolled back if the transaction
that made the changes aborts. See <xref linkend="functions-sequence">
and <xref linkend="datatype-serial">.
</para>
</important>
<sect2 id="xact-read-committed">
<title>Read Committed Isolation Level</title>