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Trigger - MySQL

Hi All, I am new to MySQL and cannot get a trigger working.. I keep getting errors. How can I create a trigger that prevents a user from entering (new or editing) a varchar that has less than 4 characters? Thanks in advance, Leigh...

  1. #1

    Default Trigger

    Hi All,

    I am new to MySQL and cannot get a trigger working.. I keep getting
    errors.

    How can I create a trigger that prevents a user from entering (new or
    editing) a varchar that has less than 4 characters?

    Thanks in advance,
    Leigh

    Leigh Guest

  2. #2

    Default Re: Trigger


    "Leigh Williams" <com> schreef in bericht
    news:googlegroups.com... 

    http://dev.mysql.com/doc/refman/5.0/en/triggers.html



    Luuk Guest

  3. #3

    Default Re: Trigger

    On Jun 16, 2:34 pm, Leigh Williams <com> wrote: 

    In this case you really shouldn't use a trigger -- use a "check"
    constraint instead:

    create table foo (
    bar varchar(50),
    check (length(bar) >= 4)
    )

    ZeldorBlat Guest

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