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Commit eea3749d authored by Bruce Momjian's avatar Bruce Momjian
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Add lock matrix to documentation. 

Teodor Sigaev
parent 6fea31b6
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doc/src/sgml/mvcc.sgml
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<!-- $PostgreSQL: pgsql/doc/src/sgml/mvcc.sgml,v 2.66 2007/01/31 20:56:18 momjian Exp $ --> <!-- $PostgreSQL: pgsql/doc/src/sgml/mvcc.sgml,v 2.67 2007/02/08 15:32:11 momjian Exp $ -->
<chapter id="mvcc"> <chapter id="mvcc">
<title>Concurrency Control</title> <title>Concurrency Control</title>
...@@ -741,6 +741,123 @@ SELECT SUM(value) FROM mytab WHERE class = 2; ...@@ -741,6 +741,123 @@ SELECT SUM(value) FROM mytab WHERE class = 2;
releases locks acquired within it. releases locks acquired within it.
</para> </para>
<table tocentry="1" id="table-lock-compatibility">
<title> Compatibility of lock modes</title>
<tgroup cols="9">
<colspec colnum="1" colwidth="1*">
<colspec colnum="2" colwidth="1*">
<colspec colnum="3" colwidth="1*">
<colspec colnum="4" colwidth="1*">
<colspec colnum="5" colwidth="1*">
<colspec colnum="6" colwidth="1*">
<colspec colnum="7" colwidth="1*">
<colspec colnum="8" colwidth="1*">
<colspec colnum="9" colwidth="1*">
<thead>
<row>
<entry>Modes</entry>
<entry>AS</entry>
<entry>RS</entry>
<entry>RE</entry>
<entry>SUE</entry>
<entry>S</entry>
<entry>SRE</entry>
<entry>E</entry>
<entry>AE</entry>
</row>
</thead>
<tbody>
<row>
<entry>AS</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">N</entry>
</row>
<row>
<entry>RS</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
</row>
<row>
<entry>RE</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
</row>
<row>
<entry>SUE</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
</row>
<row>
<entry>S</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">Y</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
</row>
<row>
<entry>SRE</entry>
<entry align="center">Y</entry>
<entry align="center">Y</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
</row>
<row>
<entry>E</entry>
<entry align="center">Y</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
</row>
<row>
<entry>AE</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
<entry align="center">N</entry>
</row>
</tbody>
</tgroup>
</table>
</sect2> </sect2>
<sect2 id="locking-rows"> <sect2 id="locking-rows">
......
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