Re: foreign key problem in creating table

  > Extension_ID    int default 0,   

try 

    Extension_ID    int default null,

----- Original Message ----- 
From: "Alexander Nakhimovsky" <[email protected]>
To: <[email protected]>
Sent: Sunday, January 08, 2006 5:25 PM
Subject: foreign key problem in creating table


I am running Ver 14.12 Distrib 5.0.17, for Win32 (ia32) on WinXP.

The code below gives me errno: 150 error (but executes on Linux):

create table METADATA_ELEM (
    Element_ID      int auto_increment not null,
    TagName         varchar(255) not null,
    Lang            varchar(255),
    Content         text,
    Extension_ID    int default 0,
    Type            varchar(20),
    Code            varchar(255) default '',
    Item_ID         int,
    Tag_ID          int,
primary key (Element_ID),
foreign key (Extension_ID) references EXTENSION (Extension_ID)
        on delete set null 
        on update cascade,
foreign key (Item_ID) references ARCHIVED_ITEM (Item_ID)
        on delete set null
        on update cascade,
foreign key (Tag_ID) references ELEMENT_DEFN (Tag_ID)
        on delete set null
        on update cascade);

However, this code runs without error:

create table ARCHIVED_ITEM (
Item_ID int auto_increment not null,
OaiIdentifier varchar(255) not null,
DateStamp date not null,
Archive_ID int,
Schema_ID int,
primary key (Item_ID),
foreign key (Archive_ID) references OLAC_ARCHIVE (Archive_ID)
        on delete set null
        on update cascade,
foreign key (Schema_ID) references SCHEMA_VERSION (Schema_ID)
        on delete set null
        on update cascade);

Thank you for your help

Alexander Nakhimovsky
Computer Science Department
Colgate University Hamilton NY 13346
  http://cs.colgate.edu/~sasha
Director, Project Afghanistan
  http://www.colgate.edu/desktopdefault1.aspx?tabid=1751

 

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