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

Craig Ringer, slightly edited by me.

diff --git a/doc/src/sgml/mvcc.sgml b/doc/src/sgml/mvcc.sgml
index 8f8858294dc32b5f0bd18e9025428317dbfbc3fe..d5c6076d4aa64ae3b899977447424197f1ef7bff 100644 (file)
--- a/doc/src/sgml/mvcc.sgml
+++ b/doc/src/sgml/mvcc.sgml
@@ -260,6 +260,18 @@
     command .
    
 
+   
+     
+       Some PostgreSQL data types and functions have
+       special rules regarding transactional behaviour.  In particular, changes
+       made to a SEQUENCE (and therefore the counter of a
+       column declared using SERIAL) are immediately visible
+       to all other transactions and are not rolled back if the transaction
+       that made the changes aborts.  See 
+       and .
+     
+   
+
   
    Read Committed Isolation Level