From a521d5a25eb0a2a09cc5662885b8fb86a85c32ba Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Thu, 11 Apr 2002 21:18:50 +0000
Subject: [PATCH] Update obsolete syntax in example of inheritance.
---
src/tutorial/advanced.source | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/src/tutorial/advanced.source b/src/tutorial/advanced.source
index 0c04a983254..7dd3ab1bb40 100644
--- a/src/tutorial/advanced.source
+++ b/src/tutorial/advanced.source
@@ -6,13 +6,13 @@
--
-- Copyright (c) 1994, Regents of the University of California
--
--- $Id: advanced.source,v 1.4 2001/09/02 23:27:50 petere Exp $
+-- $Id: advanced.source,v 1.5 2002/04/11 21:18:50 tgl Exp $
--
---------------------------------------------------------------------------
-----------------------------
-- Inheritance:
--- S table can inherit from zero or more tables. A query can reference
+-- A table can inherit from zero or more tables. A query can reference
-- either all rows of a table or all rows of a table plus all of its
-- descendants.
-----------------------------
@@ -41,19 +41,19 @@ INSERT INTO capitals VALUES ('Madison', 1.913E+5, 845, 'WI');
SELECT * FROM cities;
SELECT * FROM capitals;
--- like before, a regular query references rows of the base table only
-
-SELECT name, altitude
-FROM cities
-WHERE altitude > 500;
-
--- on the other hand, you can find all cities, including capitals, that
--- are located at an altitude of 500 'ft or higher by:
+-- You can find all cities, including capitals, that
+-- are located at an altitude of 500 ft or higher by:
SELECT c.name, c.altitude
-FROM cities* c
+FROM cities c
WHERE c.altitude > 500;
+-- To scan rows of the parent table only, use ONLY:
+
+SELECT name, altitude
+FROM ONLY cities
+WHERE altitude > 500;
+
-- clean up (you must remove the children first)
DROP TABLE capitals;
--
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