Question

I am new to Grails criteria builder, can someone please explain what does the following mean?

def c = Account.createCriteria()
         def results = c {

             like("holderFirstName", "Fred%")
             and {
                 between("balance", 500, 1000)
                 eq("branch", "London")
             }
             maxResults(10)
             order("holderLastName", "desc")
         }

Does it mean

• Select * from account where
holderFirstName like 'fred%' and
(balance between 500 and 1000 **and**
branch='london‘)
• Select * from account where
holderFirstName like 'fred%' and
(balance between 500 and 1000 **or**
branch='london‘)

If i want to use “or” and “and” together how do I do that?

Answer 1

Your example would execute as:

select * from account 
where holderFirstName like 'Fred%' 
and balance between 500 and 1000 
and branch = 'London'

All top level conditions are implied to be AND’ed together. You could create the same Criteria as:

def c = Account.createCriteria()
def results = c {
    like("holderFirstName", "Fred%")
    between("balance", 500, 1000)
    eq("branch", "London")
    maxResults(10)
    order("holderLastName", "desc")
}

To get your second query use this Criteria:

def c = Account.createCriteria()
def results = c {
    like("holderFirstName", "Fred%")
    or {
        between("balance", 500, 1000)
        eq("branch", London")
    }
    maxResults(10)
    order("holderLastName", "desc")
}

Nest your and / or closures for more complex Criteria.