How to query for terms IN a collection using Lucene.Net, similar to SQL's IN operator?

Question

We are trying to search whether documents have a particular field value in a collection of possible values,

field:[value1, value2, value3, ..., valueN]
         


        

Answer 1

As @I4V mentioned, Lucene ORs terms by default, so this should give you the wanted result,

public Query In(string propertyName, IEnumerable collection)
{
    var query = new QueryParser(version, propertyName, analyzer).Parse(string.Join(" ", collection));

    return query;
}

based on,

field:value1, value2, value3, ..., valueN

will return any document with at least one value in the collection.