Java Oracle exception - “maximum number of expressions in a list is 1000”

Question

I am passing a list of Strings to my query(SQL query written) to fetch the required data. But I am getting this exception:

ora-01795 maximum number

Answer 1

You cant have a list with more than 1000 elements in a single "where" condition if you are working with Oracle DB. So you can chop down your "where" condition in multiple "where" conditions and join them with "or" clause.

If you are using hibernate Criteria, you can use below Java method to do this. Just replace your code where ever you used

criteria.add(Restrictions.in(propertyName, mainList));

with

addCriteriaIn(propertyName, mainList, criteria);

which the method is :

 private void addCriteriaIn (String propertyName, List list,Criteria criteria)
  {
    Disjunction or = Restrictions.disjunction();
    if(list.size()>1000)
    {        
      while(list.size()>1000)
      {
        List subList = list.subList(0, 1000);
        or.add(Restrictions.in(propertyName, subList));
        list.subList(0, 1000).clear();
      }
    }
    or.add(Restrictions.in(propertyName, list));
    criteria.add(or);
  }