Doc: fix syntax synopsis for INSERT ... ON CONFLICT DO UPDATE.

Commit 906bfcad7 adjusted the syntax synopsis for UPDATE, but missed
the fact that the INSERT synopsis now contains a duplicate of that.

In passing, improve wording and markup about using a table alias to
dodge the conflict with use of "excluded" as a special table name.

diff --git a/doc/src/sgml/ref/insert.sgml b/doc/src/sgml/ref/insert.sgml
index 9339826818cf487ea315c60d3ccadaee9fc62d3e..521216b5d5243a08a5c5f22416ff4c6efd2a0e06 100644 (file)
--- a/doc/src/sgml/ref/insert.sgml
+++ b/doc/src/sgml/ref/insert.sgml
@@ -36,7 +36,7 @@ INSERT INTO table_name [ AS 
 
     DO NOTHING
     DO UPDATE SET { column_name = { expression | DEFAULT } |
-                    ( column_name [, ...] ) = ( { expression | DEFAULT } [, ...] ) |
+                    ( column_name [, ...] ) = [ ROW ] ( { expression | DEFAULT } [, ...] ) |
                     ( column_name [, ...] ) = ( sub-SELECT )
                   } [, ...]
               [ WHERE condition ]
@@ -174,9 +174,9 @@ INSERT INTO table_name [ AS 
         A substitute name for 
         class="PARAMETER">table_name.  When an alias is
         provided, it completely hides the actual name of the table.
-        This is particularly useful when ON CONFLICT DO
-        UPDATE targets a table named excluded, since that's
-        also the name of the special table representing rows proposed
+        This is particularly useful when ON CONFLICT DO UPDATE
+        targets a table named excluded, since that will otherwise
+        be taken as the name of the special table representing rows proposed
         for insertion.