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Database server does not support the InnoDB storage engine

During installation of magento, sometimes we get the error as "database server does not support the InnoDB storage engine".
To overcome this, edit the line of the file app/code/core/Mage/Install/Model/Installer/Db/Mysql4.php

Replace
public function supportEngine()
    {
        $variables  = $this->_getConnection()
            ->fetchPairs('SHOW VARIABLES');
        return (!isset($variables['have_innodb']) || $variables['have_innodb'] != 'YES') ? false : true;
    }

with

public function supportEngine()
    {
        $variables  = $this->_getConnection()
            ->fetchPairs('SHOW ENGINES');
        return (isset($variables['InnoDB']) && $variables['InnoDB'] != 'NO');
    }

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