CREATE TABLE ... LIKE ... should mark the columns it creates with

attislocal = true, since they are not really inherited but merely copied
from the original table.  I'm not sure if there are any cases where it makes
a real difference given the existing uses of the flag, but wrong is wrong.
This was fixed in passing in HEAD by the LIKE INCLUDING CONSTRAINTS patch,
but never back-patched.

src/backend/parser/analyze.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	$PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.326.2.2 2006/06/21 18:30:19 tgl Exp $
+ *	$PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.326.2.3 2006/10/11 20:03:11 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1088,7 +1088,7 @@ transformInhRelation(ParseState *pstate, CreateStmtContext *cxt,
 	constr = tupleDesc->constr;
 
 	/*
-	 * Insert the inherited attributes into the cxt for the new table
+	 * Insert the copied attributes into the cxt for the new table
 	 * definition.
 	 */
 	for (parent_attno = 1; parent_attno <= tupleDesc->natts;
@@ -1106,7 +1106,7 @@ transformInhRelation(ParseState *pstate, CreateStmtContext *cxt,
 			continue;
 
 		/*
-		 * Create a new inherited column.
+		 * Create a new column, which is marked as NOT inherited.
 		 *
 		 * For constraints, ONLY the NOT NULL constraint is inherited by the
 		 * new column definition per SQL99.
@@ -1118,7 +1118,7 @@ transformInhRelation(ParseState *pstate, CreateStmtContext *cxt,
 		typename->typmod = attribute->atttypmod;
 		def->typename = typename;
 		def->inhcount = 0;
-		def->is_local = false;
+		def->is_local = true;
 		def->is_not_null = attribute->attnotnull;
 		def->raw_default = NULL;
 		def->cooked_default = NULL;