help with referential integrity

Date: Mon, 11 Dec 2000 18:43:55 -0800
To: pgsql-general@postgresql.org
From: Soma Interesting 
Subject: help with referential integrity


I'm attempting, for the first time, to make use of referential integrity, 
but I'm getting an error.

Warning: PostgreSQL query failed: ERROR: referential integrity violation - 
key referenced from LessonsPages not found in Lessons

Here is the table's structures:

CREATE SEQUENCE "LessonsPages_id_seq";
CREATE TABLE "LessonsPages" (
    "id" int4 DEFAULT nextval('"LessonsPages_id_seq"') NOT NULL,
    "lid" int4 NOT NULL
			REFERENCES "Pages"
			ON DELETE CASCADE,
    "pid" int4 NOT NULL
			REFERENCES "Lessons"
			ON DELETE CASCADE,
    PRIMARY KEY ("lid", "pid")
);

CREATE SEQUENCE "Lessons_id_seq";
CREATE TABLE "Lessons" (
    "id" int4 nextval('"Lessons_id_seq"') NOT NULL,
    "page_name" char(64),
    "summary_email" bool,
    "order_num" int2,
    PRIMARY KEY ("id")
);

CREATE SEQUENCE "Pages_id_seq";
CREATE TABLE "Pages" (
    "id" int4 nextval('"Pages_id_seq"') NOT NULL,
    "page_name" char(64),
    "summary_email" bool,
    "order_num" int2,
    PRIMARY KEY ("id")
);

The error comes when:

INSERT INTO "Pages" (order_num) VALUES (1);
SELECT id FROM "Pages";
|	id	|
	16
1 Row

INSERT INTO "Lessons" (lesson_name, order_num) VALUES ('test lesson', 2);
SELECT id FROM "Lessons";
| 	id	|
	9
1 Row

INSERT INTO "LessonsPages" (lid,pid) VALUES (9,16);


What am I doing wrong?

-          -          -          -          -          -          - 
  -          -          -          -          -
WARNING: Some experts believe that use of any keyboard may cause serious 
injury.
Consult Users Guide.
                                                                                                   dfunct@telus.net