Remove duplicate entry for R_PLAN (thanks Bruce).

Add entry for undocumented (?) KSQO.

doc/src/sgml/ref/set.sgml

@@ -20,7 +20,6 @@ SET
 <REPLACEABLE CLASS="PARAMETER">
 </REPLACEABLE>
 SET <REPLACEABLE CLASS="PARAMETER">variable</REPLACEABLE> { TO | = } { '<REPLACEABLE CLASS="PARAMETER">value</REPLACEABLE>' | DEFAULT }
-
 SET TIME ZONE { '<REPLACEABLE CLASS="PARAMETER">timezone</REPLACEABLE>' | LOCAL };
 </SYNOPSIS>
 
@@ -52,7 +51,7 @@ New value of parameter.
 </variablelist>
 
 <para>
-         The possible variables and allowed values are:
+The possible variables and allowed values are:
 
 <VARIABLELIST>
 <VARLISTENTRY>
@@ -197,16 +196,18 @@ set time zone to your local timezone
 </variablelist>
 
 <para>
-                If an invalid time zone is specified, the time zone
-                becomes GMT (on most systems anyway).
+If an invalid time zone is specified, the time zone
+becomes GMT (on most systems anyway).
+
 <para>
-                A frontend which uses libpq may be initialized by setting the PGTZ
-                environment variable.
+A frontend which uses libpq may be initialized by setting the PGTZ
+environment variable.
+
 <para>
-                The second syntax shown above, allows one to set the timezone
-                with a syntax similar to SQL92 <command>SET TIME ZONE</command>.
-                The LOCAL keyword is just an alternate form
-                of DEFAULT for SQL92 compatibility.
+The second syntax shown above, allows one to set the timezone
+with a syntax similar to SQL92 <command>SET TIME ZONE</command>.
+The LOCAL keyword is just an alternate form
+of DEFAULT for SQL92 compatibility.
 
 </varlistentry>
 </variablelist>
@@ -315,7 +316,7 @@ DEFAULT
 </term>
 <listitem>
 <para>
-Equivalent to specifying <command>SET GEQO=On</command>
+Equivalent to specifying <command>SET GEQO='on'</command>
 </varlistentry>
 </variablelist>
 
@@ -361,7 +362,7 @@ DEFAULT
 </term>
 <listitem>
 <para>
-Equivalent to specifying <command>SET R_PLANS=Off</command>.
+Equivalent to specifying <command>SET R_PLANS='off'</command>.
 </variablelist>
 
 <para>
@@ -375,11 +376,13 @@ Equivalent to specifying <command>SET R_PLANS=Off</command>.
 
 <varlistentry>
 <term>
-R_PLANS
+KSQO
 </term>
 <listitem>
 <para>
-Determines whether right-hand plan evaluation is allowed:
+<firstterm>Key Set Query Optimizer</firstterm> forces the query optimizer
+to optimize repetative OR clauses such as generated by
+<productname>MicroSoft Access</productname>:
 
 <variablelist>
 <varlistentry>
@@ -388,7 +391,7 @@ On
 </term>
 <listitem>
 <para>
-enables right-hand evaluation of plans.
+enables this optimization.
 
 <varlistentry>
 <term>
@@ -396,7 +399,7 @@ Off
 </term>
 <listitem>
 <para>
-disables right-hand evaluation of plans.
+disables this optimization.
 
 <varlistentry>
 <term>
@@ -404,7 +407,7 @@ DEFAULT
 </term>
 <listitem>
 <para>
-Equivalent to specifying <command>SET R_PLANS=Off</command>.
+Equivalent to specifying <command>SET KSQO='off'</command>.
 </variablelist>
 
 <para>
@@ -430,7 +433,8 @@ Value
 </term>
 <listitem>
 <para>
-Maximum number of rows to return for a query.  The default is unlimited.
+Maximum number of rows to return for a query.  The default is to allow
+an unlimited number of rows.
 <varlistentry>
 <term>
 <replaceable class="parameter">#</replaceable>
@@ -445,12 +449,12 @@ DEFAULT
 </term>
 <listitem>
 <para>
-Sets the number of rows returned by a query to unlimited.
+Sets the maximum number of rows returned by a query to be unlimited.
 </varlistentry>
 
 <para>
-                By default, there is no limit to the number of rows
-		returned by a query.
+By default, there is no limit to the number of rows
+returned by a query.
 </variablelist>
 
 </VARLISTENTRY>