From: Bruce Momjian <bruce@momjian.us>
Date: Wed, 25 Mar 2015 00:56:09 +0000 (-0400)
Subject: docs:  clarify when MVCC snapshot is taken
X-Git-Tag: REL9_5_ALPHA1~563
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=66c8040d509c86fd2f215c06eb16d82e570d3fb6;p=thirdparty%2Fpostgresql.git

docs:  clarify when MVCC snapshot is taken

Report by Álvaro Hernández Tortosa
---

diff --git a/doc/src/sgml/mvcc.sgml b/doc/src/sgml/mvcc.sgml
index a0d6867de0f..e43a3be6d4e 100644
--- a/doc/src/sgml/mvcc.sgml
+++ b/doc/src/sgml/mvcc.sgml
@@ -422,8 +422,9 @@ COMMIT;
    <para>
     This level is different from Read Committed in that a query in a
     repeatable read transaction sees a snapshot as of the start of the
+    first non-transaction-control statement in the
     <emphasis>transaction</>, not as of the start
-    of the current query within the transaction.  Thus, successive
+    of the current statement within the transaction.  Thus, successive
     <command>SELECT</command> commands within a <emphasis>single</>
     transaction see the same data, i.e., they do not see changes made by
     other transactions that committed after their own transaction started.