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Upgrade from MySQL4 to MySQL5. Will my scripts stop working?

Discussion in 'General Discussion' started by SuperBaby, Jun 19, 2009.

  1. SuperBaby

    SuperBaby Well-Known Member

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    I am currently running PHP 5.2.9 but I am still using MySQL4. I am running a lot of Perl and PHP scripts (that use MySQL database) in my websites. I would like to upgrade to MySQL5 but I worry that my scripts will stop working. Will my scripts stop functioning?

    After upgrading and if there are problems, can I switch back to MySQL4?
     
    #1 SuperBaby, Jun 19, 2009
  2. InstaCarma_Tech

    InstaCarma_Tech Well-Known Member

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    Stop the MySQL service and take a backup of all your databases first. Then you can upgrade the MySQL . Note that you will have to recompile PHP after the upgrade.
     
    #2 InstaCarma_Tech, Jun 20, 2009
  3. SuperBaby

    SuperBaby Well-Known Member

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    Thanks for the advice. But do you think it is likely my scripts will give problems after upgrading?
     
    #3 SuperBaby, Jun 20, 2009
  4. pjman

    pjman Well-Known Member

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    Should be safe.

    I had the same predicament last year. Should I upgrade MYSQL from 4.0.x to 5, when I had to upgrade PHP to 5? I chose to keep MYSQL 4.0x. I'm about to upgrade next week. From all my research, I here that the jump to MYSQL 4.1x is a pain, but very do-able. And the leap to MYSQL 5, is easy.

    I haven't heard anyone report big problems with any scripts of any kind when moving to MYSQL to 5. If you hear anything, I would love to know.

    Good Luck....
     
    #4 pjman, Jun 22, 2009
  5. PlatinumServerM

    PlatinumServerM Well-Known Member
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    Upgrading from mysql4 to mysql5 sometimes does cause problems with existing databases/scripts. Sometimes it goes smoother than others. Always make full backups just in case and you should be fine if something goes wrong.
     
    #5 PlatinumServerM, Jun 22, 2009
  6. UBERHOST

    UBERHOST Well-Known Member

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    Adding to all of the above, I'd say that if you have scripts so outdated that they would be broken by upgrading MySQL, such scripts pose a security hazard to your server.
     
    #6 UBERHOST, Jun 22, 2009
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