-<!-- $PostgreSQL: pgsql/doc/src/sgml/mvcc.sgml,v 2.74 2010/04/03 07:22:55 petere Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/mvcc.sgml,v 2.75 2010/05/03 15:35:30 alvherre Exp $ -->
<chapter id="mvcc">
<title>Concurrency Control</title>
mode — but the semantics are all the same. The only real difference
between one lock mode and another is the set of lock modes with
which each conflicts (see <xref linkend="table-lock-compatibility">).
- . Two transactions cannot hold locks of conflicting
+ Two transactions cannot hold locks of conflicting
modes on the same table at the same time. (However, a transaction
never conflicts with itself. For example, it might acquire
<literal>ACCESS EXCLUSIVE</literal> lock and later acquire