Brief note about sequence cache not being cleared in other backends.

Actually clear the cache in the backend making the alteration.  This
follows in the footsteps of setval().

Rod Taylor

doc/src/sgml/keywords.sgml

@@ -1,4 +1,4 @@
-<!-- $Header: /cvsroot/pgsql/doc/src/sgml/keywords.sgml,v 2.8 2002/11/11 20:14:03 petere Exp $ -->
+<!-- $Header: /cvsroot/pgsql/doc/src/sgml/keywords.sgml,v 2.9 2003/06/12 07:49:43 momjian Exp $ -->
 
 <appendix id="sql-keywords-appendix">
  <title><acronym>SQL</acronym> Key Words</title>
@@ -872,6 +872,12 @@
     <entry>reserved</entry>
     <entry>reserved</entry>
    </row>
+   <row>
+    <entry><token>DEFAULTS</token></entry>
+    <entry>non-reserved</entry>
+    <entry></entry>
+    <entry></entry>
+   </row>
    <row>
     <entry><token>DEFERRABLE</token></entry>
     <entry>reserved</entry>
@@ -1100,6 +1106,12 @@
     <entry>reserved</entry>
     <entry>reserved</entry>
    </row>
+   <row>
+    <entry><token>EXCLUDING</token></entry>
+    <entry>non-reserved</entry>
+    <entry></entry>
+    <entry></entry>
+   </row>
    <row>
     <entry><token>EXCLUSIVE</token></entry>
     <entry>non-reserved</entry>
@@ -1394,6 +1406,12 @@
     <entry>reserved</entry>
     <entry>reserved</entry>
    </row>
+   <row>
+    <entry><token>INCLUDING</token></entry>
+    <entry>non-reserved</entry>
+    <entry></entry>
+    <entry></entry>
+   </row>
    <row>
     <entry><token>INCREMENT</token></entry>
     <entry>non-reserved</entry>

doc/src/sgml/ref/alter_sequence.sgml

@@ -1,5 +1,5 @@
 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_sequence.sgml,v 1.1 2003/03/20 07:02:07 momjian Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_sequence.sgml,v 1.2 2003/06/12 07:49:43 momjian Exp $
 PostgreSQL documentation
 -->
 
@@ -236,6 +236,12 @@ ALTER SEQUENCE serial RESTART WITH 105;
    later aborts. This means that aborted transactions may leave unused "holes" in
    the sequence of assigned values. setval operations are never rolled back, either.
   </para>
+  <para>
+   <command>ALTER SEQUENCE</command> will not immediately affect backends, other than the
+   current one, which have cached sequence values. They must use up all cached values
+   prior to noticing the changed sequence parameters.  The current backend will be 
+   immediatly affected.
+  </para>
  </refsect1>
 
 

doc/src/sgml/ref/create_table.sgml

@@ -1,5 +1,5 @@
 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_table.sgml,v 1.68 2003/05/04 00:03:55 tgl Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_table.sgml,v 1.69 2003/06/12 07:49:43 momjian Exp $
 PostgreSQL documentation
 -->
 
@@ -18,7 +18,8 @@ PostgreSQL documentation
 <synopsis>
 CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } ] TABLE <replaceable class="PARAMETER">table_name</replaceable> (
     { <replaceable class="PARAMETER">column_name</replaceable> <replaceable class="PARAMETER">data_type</replaceable> [ DEFAULT <replaceable>default_expr</> ] [ <replaceable class="PARAMETER">column_constraint</replaceable> [, ... ] ]
-    | <replaceable>table_constraint</replaceable> }  [, ... ]
+    | <replaceable>table_constraint</replaceable>
+    | LIKE <replaceable>parent_table</replaceable> [ { INCLUDING | EXCLUDING } DEFAULTS ] }  [, ... ]
 )
 [ INHERITS ( <replaceable>parent_table</replaceable> [, ... ] ) ]
 [ WITH OIDS | WITHOUT OIDS ]
@@ -172,6 +173,26 @@ and <replaceable class="PARAMETER">table_constraint</replaceable> is:
     </listitem>
    </varlistentry>
 
+   <varlistentry>
+    <term><literal>LIKE <replaceable>parent_table</replaceable> [ { INCLUDING | EXCLUDING } DEFAULTS ]</literal></term>
+    <listitem>
+     <para>
+      The <literal>LIKE</literal> clause specifies a table from which
+      the new table automatically inherits all column names, their datatypes, and
+      <literal>NOT NULL</literal> constraints.
+     </para>
+     <para>
+      Unlike <literal>INHERITS</literal>, the new table and inherited table
+      are complete decoupled after creation has been completed.  Data inserted
+      into the new table will not be reflected into the parent table.
+     </para>
+     <para>
+      Default expressions for the inherited column definitions will only be included if
+      <literal>INCLUDING DEFAULTS</literal> is specified.  The default is to exclude
+      default expressions.
+    </listitem>
+   </varlistentry>
+
    <varlistentry>
     <term><literal>INHERITS ( <replaceable>parent_table</replaceable> [, ... ] )</literal></term>
     <listitem>

src/backend/commands/sequence.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/commands/sequence.c,v 1.95 2003/03/21 03:55:21 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/commands/sequence.c,v 1.96 2003/06/12 07:49:43 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -345,6 +345,11 @@ AlterSequence(AlterSeqStmt *stmt)
 		seq->log_cnt = 1;
 	}
 
+	/* save info in local cache */
+	elm->last = new.last_value;		/* last returned number */
+	elm->cached = new.last_value;	/* last cached number (forget cached
+									 * values) */
+
 	START_CRIT_SECTION();
 
 	/* XLOG stuff */