Mention in the docs that temporary/non-temp tables can not share

referential integrity relationships.

diff --git a/doc/src/sgml/ref/create_table.sgml b/doc/src/sgml/ref/create_table.sgml
index cc6e719f8268acea581c4be1923cdf38e2133c1d..0af0b42c5d3ba2f7b2623dc0ed6b16ff321db76a 100644 (file)
--- a/doc/src/sgml/ref/create_table.sgml
+++ b/doc/src/sgml/ref/create_table.sgml
@@ -421,7 +421,9 @@ and <replaceable class="PARAMETER">table_constraint</replaceable> is:
       primary key of the <replaceable
       class="parameter">reftable</replaceable> is used.  The
       referenced columns must be the columns of a unique or primary
-      key constraint in the referenced table.
+      key constraint in the referenced table.  Note that foreign key
+      constraints may not be defined between temporary tables and
+      permanent tables.
      </para>
 
      <para>