I am working on a Grails application with MySQL database. I\u00a0had a use case in which I had to implement alphanumeric sorting using Criteria Query on Grails. By alphanumeric sorting I mean if there is a class Employee with field empId then on doing :<\/p>\n
[plain]
\nEmployee e1 = new Employee(empId:’emp10′).save()
\nEmployee e2 = new Employee(empId:’emp2′).save()
\nEmployee e3 = new Employee(empId:’emp1′).save()
\nEmployee e4 = new Employee(empId:’1emp’).save()
\nEmployee e5 = new Employee(empId:’10emp’).save()
\nEmployee e6 = new Employee(empId:’2emp’).save()<\/p>\n
Employee.createCriteria().list([sort:’empId’])
\n \/* OR *\/
\nEmployee.createCriteria().list{
\n order(’empId’)
\n}
\n[\/plain]<\/p>\n
should give result like [e4,e6,e5,e3,e2,e1]<\/strong>. But according to sql sorting the result would be [e5,e4,e6,e3,e1,e2]<\/strong><\/p>\n One thing to note was that criteria query implemented sorting at the database end. To migrate the functions in script to database you have to unzip the script and write following command on terminal:<\/p>\n [shell]mysql -u username -p database_name < \/path\/to\/unzipped\/directory\/natsort.install.mysql[\/shell]<\/p>\n
\nAfter googling around, I came across a script<\/a> that had a SQL function which converted the field value to string that can alphanumerically sorted easily at database end.<\/p>\n