diff --git a/doc/src/sgml/glossary.sgml b/doc/src/sgml/glossary.sgml
new file mode 100644
index fe8def4..5815fa4
--- a/doc/src/sgml/glossary.sgml
+++ b/doc/src/sgml/glossary.sgml
@@ -1097,8 +1097,8 @@
      (just like a <glossterm linkend="glossary-view">view</glossterm>),
      but stores data in the same way that a
      <glossterm linkend="glossary-table">table</glossterm> does. It cannot be
-     modified via <command>INSERT</command>, <command>UPDATE</command>, or
-     <command>DELETE</command> operations.
+     modified via <command>INSERT</command>, <command>UPDATE</command>,
+     <command>DELETE</command>, or <command>MERGE</command> operations.
     </para>
     <para>
      For more information, see
@@ -1106,6 +1106,23 @@
     </para>
    </glossdef>
   </glossentry>
+
+  <glossentry id="glossary-merge">
+   <glossterm>Merge</glossterm>
+   <glossdef>
+    <para>
+     An <acronym>SQL</acronym> command used to conditionally add, modify,
+     or remove <glossterm linkend="glossary-tuple">rows</glossterm>
+     in a given <glossterm linkend="glossary-table">table</glossterm>,
+     using data from a source
+     <glossterm linkend="glossary-relation">relation</glossterm>.
+    </para>
+    <para>
+     For more information, see
+     <xref linkend="sql-merge"/>.
+    </para>
+   </glossdef>
+  </glossentry>
 
   <glossentry id="glossary-mvcc">
    <glossterm>Multi-version concurrency control (MVCC)</glossterm>
diff --git a/doc/src/sgml/ref/merge.sgml b/doc/src/sgml/ref/merge.sgml
new file mode 100644
index 0f61d47..ab78510
--- a/doc/src/sgml/ref/merge.sgml
+++ b/doc/src/sgml/ref/merge.sgml
@@ -102,14 +102,14 @@ DELETE
    that are referred to in the <literal>SET</literal> clause.
    If you specify an insert action, you must have the <literal>INSERT</literal>
    privilege on the <replaceable class="parameter">target_table_name</replaceable>.
-   If you specify an delete action, you must have the <literal>DELETE</literal>
+   If you specify a delete action, you must have the <literal>DELETE</literal>
    privilege on the <replaceable class="parameter">target_table_name</replaceable>.
    Privileges are tested once at statement start and are checked
    whether or not particular <literal>WHEN</literal> clauses are executed.
-   You will require the <literal>SELECT</literal> privilege on the
-   <replaceable class="parameter">data_source</replaceable> and any column(s)
-   of the <replaceable class="parameter">target_table_name</replaceable>
-   referred to in a <literal>condition</literal>.
+   You will require the <literal>SELECT</literal> privilege and any column(s)
+   of the <replaceable class="parameter">data_source</replaceable> and
+   <replaceable class="parameter">target_table_name</replaceable> referred to
+   in any <literal>condition</literal> or <literal>expression</literal>.
   </para>
 
   <para>