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From: Darren King <darrenk@insightdist.com>

Browse Source 
Seem to remember someone posting to one of the lists a while back
that the tutorial code wouldn't compile and/or run.  Found four
problems with it that will let it run.

1. Tutorial makefile had a recursive use of DLOBJS.

2. Some tutorial needed semi-colons added to many statements.

3. Complex tutorial didn't clean up after itself.

4. Advanced had a time-travel example.  Commented it out and
   put a line pointing the user to contrib/spi/README.
This commit is contained in:
Marc G. Fournier
1998-02-28 23:37:10 +00:00
parent bc58c5867d
commit 5b3e78afe3
4 changed files with 72 additions and 49 deletions
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38
src/tutorial/advanced.source
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@ -7,7 +7,7 @@
--
-- Copyright (c) 1994, Regents of the University of California
--
-- $Id: advanced.source,v 1.1.1.1 1996/07/09 06:22:34 scrappy Exp $
-- $Id: advanced.source,v 1.2 1998/02/28 23:37:08 scrappy Exp $
--
---------------------------------------------------------------------------
@ -25,21 +25,21 @@ CREATE TABLE cities (
name text,
population float8,
altitude int -- (in ft)
)
);
CREATE TABLE capitals (
state char2
) INHERITS (cities);
-- now, let's populate the tables
INSERT INTO cities VALUES ('San Francisco', 7.24E+5, 63)
INSERT INTO cities VALUES ('Las Vegas', 2.583E+5, 2174)
INSERT INTO cities VALUES ('Mariposa', 1200, 1953)
INSERT INTO cities VALUES ('San Francisco', 7.24E+5, 63);
INSERT INTO cities VALUES ('Las Vegas', 2.583E+5, 2174);
INSERT INTO cities VALUES ('Mariposa', 1200, 1953);
INSERT INTO capitals VALUES ('Sacramento', 3.694E+5, 30, 'CA')
INSERT INTO capitals VALUES ('Madison', 1.913E+5, 845, 'WI')
INSERT INTO capitals VALUES ('Sacramento', 3.694E+5, 30, 'CA');
INSERT INTO capitals VALUES ('Madison', 1.913E+5, 845, 'WI');
SELECT * FROM cities
SELECT * FROM cities;
SELECT * FROM capitals;
-- like before, a regular query references rows of the base table only
@ -59,25 +59,27 @@ WHERE c.altitude > 500;
-----------------------------
-- Time Travel:
-- this feature allows you to run historical queries.
-- removed for v6.3, but possible using triggers.
-- see contrib/spi/README for more information.
-----------------------------
-- first, let's make some changes to the cities table (suppose Mariposa's
-- population grows 10% this year)
UPDATE cities
SET population = population * 1.1
WHERE name = 'Mariposa';
-- UPDATE cities
-- SET population = population * 1.1
-- WHERE name = 'Mariposa';
-- the default time is the current time ('now'):
SELECT * FROM cities WHERE name = 'Mariposa';
-- SELECT * FROM cities WHERE name = 'Mariposa';
-- we can also retrieve the population of Mariposa ever has. ('epoch' is the
-- earliest time representable by the system)
SELECT name, population
FROM cities['epoch', 'now'] -- can be abbreviated to cities[,]
WHERE name = 'Mariposa';
-- SELECT name, population
-- FROM cities['epoch', 'now'] -- can be abbreviated to cities[,]
-- WHERE name = 'Mariposa';
----------------------
@ -96,7 +98,7 @@ CREATE TABLE sal_emp (
INSERT INTO sal_emp VALUES (
'Bill',
'{10000,10000,10000,10000}',
'{{"meeting", "lunch"}, {}}')
'{{"meeting", "lunch"}, {}}');
INSERT INTO sal_emp VALUES (
'Carol',
@ -120,6 +122,6 @@ SELECT sal_emp.schedule[1:2][1:1] FROM sal_emp WHERE
-- clean up (you must remove the children first)
DROP TABLE sal_emp
DROP TABLE capitals
DROP TABLE sal_emp;
DROP TABLE capitals;
DROP TABLE cities;