Question

I have a database table like this

Port Code     | Country   |Port_Name
--------------------------------------
 1234         | Australia | port1
 2345         | India     | Mumbai
 2341         | Australia | port2
 ...

The table consists of around 12000 entries.I need to auto-complete as the user enter’s the query.Now the query can be any either a port-code,country or a port name.For example if the users partial query is ’12’ and the drop-down should display 1234 | Australia | port1.The problem that i’m facing now is that for each user entry i’m querying the database which makes the auto-complete really slow.So is there a way to optimize this ?

Answer 1

in smartgwt use comboboxitem.Then override getPickListFilterCriteria of comboxitem like this

ComboBoxItem portSelect = new ComboBoxItem("PORT_ATTRIB", "") {

      @Override
      public Criteria getPickListFilterCriteria() {
        if (getValue() != null && getValue() instanceof String) {
          criteria = new AdvancedCriteria(OperatorId.AND, new Criterion[]{new Criterion("portValue",
              OperatorId.EQUALS, getDisplayValue())});
        }
        return criteria;
      }
    };

Every key press will give you a criteria which u can pass to your query.Query will be something likeselect * from port where portName like '+criteria+%' or portCode like '+criteria+%