|
postgres=#
postgres=# CREATE TABLE "shipments" (
postgres(# "id" integer DEFAULT nextval('"shipments_ship_id_seq"'::text) NOT NULL,
postgres(# "customer_id" integer,
postgres(# "isbn" text,
postgres(# "ship_date" timestamp with time zone
postgres(# );
CREATE TABLE
postgres=#
postgres=# insert into shipments values (375, 142, '039480001X','2004-01-06 09:19:21-01');
INSERT 0 1
postgres=# insert into shipments values (323, 671, '0451160916','2004-02-14 10:26:41-02');
INSERT 0 1
postgres=# insert into shipments values (998, 1045, '0590445065','2004-03-12 12:39:47-03');
INSERT 0 1
postgres=#
postgres=#
postgres=# -- Using timestamp values correctly
postgres=#
postgres=# CREATE FUNCTION add_shipment (integer, text) RETURNS timestamp AS '
postgres'# DECLARE
postgres'# -- Declare aliases for function arguments.
postgres'# customer_id ALIAS FOR $1;
postgres'# isbn ALIAS FOR $2;
postgres'#
postgres'# shipment_id INTEGER;
postgres'# right_now timestamp;
postgres'#
postgres'# BEGIN
postgres'# right_now := ''now'';
postgres'#
postgres'# SELECT INTO shipment_id id FROM shipments ORDER BY id DESC;
postgres'#
postgres'# shipment_id := shipment_id + 1;
postgres'#
postgres'# INSERT INTO shipments VALUES ( shipment_id, customer_id, isbn, right_now );
postgres'#
postgres'# RETURN right_now;
postgres'# END;
postgres'# ' LANGUAGE 'plpgsql';
CREATE FUNCTION
postgres=#
postgres=# select add_shipment(1, '123');
add_shipment
-------------------------
2006-10-18 19:15:49.125
(1 row)
postgres=#
postgres=# select * from shipments;
id | customer_id | isbn | ship_date
-----+-------------+------------+----------------------------
375 | 142 | 039480001X | 2004-01-06 02:19:21-08
323 | 671 | 0451160916 | 2004-02-14 04:26:41-08
998 | 1045 | 0590445065 | 2004-03-12 07:39:47-08
999 | 1 | 123 | 2006-10-18 19:15:49.125-07
(4 rows)
postgres=#
postgres=# drop FUNCTION add_shipment (integer, text);
DROP FUNCTION
postgres=# drop table shipments;
DROP TABLE
postgres=#
postgres=#
|