Re: Bug #583: Wrong example in 7.2 Tutorial - Mailing list pgsql-bugs

Great.  Patch applied.  Thanks.


---------------------------------------------------------------------------

pgsql-bugs@postgresql.org wrote:
> Rainer Tammer (rainer.tammer@spg.schulergroup.com) reports a bug with a severity of 4
> The lower the number the more severe it is.
>
> Short Description
> Wrong example in 7.2 Tutorial
>
> Long Description
> Wrong referentical integrity example in PostgreSQL 7.2 Tutorial
>
> Sample Code
> Chapter 3.3. Foreign Keys
> =========================
>
> test=# CREATE TABLE cities (
> test(# name varchar(80) primary key,
> test(# location point
> test(# );
> NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index 'cities_pkey' for table 'cities'
> CREATE
> test=# CREATE TABLE weather (
> test(# city varchar(80) references weather,
> test(# temp_lo int,
> test(# temp_hi int,
> test(# prcp real,
> test(# date date
> test(# );
> NOTICE:  CREATE TABLE will create implicit trigger(s) for FOREIGN KEY check(s)
> ERROR:  PRIMARY KEY for referenced table "weather" not found
>
> I think the following is correct:
>
> CREATE TABLE cities (
> city varchar(80) primary key,
> location point
> );
>
> CREATE TABLE weather (
> city varchar(80) references cities,
> temp_lo int,
> temp_hi int,
> prcp real,
> date date
> );
>
> test=# \d cities
>                 Table "cities"
>   Column  |         Type          | Modifiers
> ----------+-----------------------+-----------
>  city     | character varying(80) | not null
>  location | point                 |
> Primary key: cities_pkey
> Triggers: RI_ConstraintTrigger_185133,
>           RI_ConstraintTrigger_185135
>
> test=# \d weather
>                Table "weather"
>  Column  |         Type          | Modifiers
> ---------+-----------------------+-----------
>  city    | character varying(80) |
>  temp_lo | integer               |
>  temp_hi | integer               |
>  prcp    | real                  |
>  date    | date                  |
> Triggers: RI_ConstraintTrigger_185131
>
> test=#  INSERT INTO weather VALUES ('Berkeley', 45, 53, 0.0, '1994-11-28');
> ERROR:  <unnamed> referential integrity violation - key referenced from weather not found in cities
>
> INSERT INTO cities VALUES ('Berkeley', '0,0');
> INSERT 185138 1
> INSERT INTO weather VALUES ('Berkeley', 45, 53, 0.0, '1994-11-28');
> INSERT 185139 1
>
> Bye
>  Rainer Tammer
>
>
> No file was uploaded with this report
>
>
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Index: doc/src/sgml/advanced.sgml
===================================================================
RCS file: /cvsroot/pgsql/doc/src/sgml/advanced.sgml,v
retrieving revision 1.26
diff -c -r1.26 advanced.sgml
*** doc/src/sgml/advanced.sgml    2001/11/23 21:08:51    1.26
--- doc/src/sgml/advanced.sgml    2002/02/12 22:22:06
***************
*** 103,114 ****

  <programlisting>
  CREATE TABLE cities (
!     name        varchar(80) primary key,
      location    point
  );

  CREATE TABLE weather (
!     city        varchar(80) references weather,
      temp_lo        int,
      temp_hi        int,
      prcp        real,
--- 103,114 ----

  <programlisting>
  CREATE TABLE cities (
!     city        varchar(80) primary key,
      location    point
  );

  CREATE TABLE weather (
!     city        varchar(80) references cities,
      temp_lo        int,
      temp_hi        int,
      prcp        real,