Package com.orchestranetworks.query

Interface QueryResult<T>

  • All Superinterfaces:
    AutoCloseable, Iterable<T>
    public interface QueryResult<T>
extends Iterable<T>, AutoCloseable
    Represents the result of a query.

    Traversing and closing the result

    A QueryResult instance must always be closed after its use.

    Here is a code sample benefiting from the automatic closing provided by AutoCloseable and its associated try-with-resources notation:

     
 Query<Tuple> query = dataset.createQuery("SELECT id, name FROM customer");
 try (QueryResult<Tuple> result = query.getResult())
 {
        for (Tuple t : result)
        {
                Integer id = t.get(0, Integer.class);
                String name = t.get(1, String.class);
                ...
        }
 }

    Note that a QueryResult supports just one active iterator at a time. When creating an iterator, any iterator previously created for this QueryResult will be invalidated.

    Concurrency

    A QueryResult instance is not thread-safe and it must be used only by the thread that created it.

    If the table is concurrently updated, the rules specified by Query snapshot isolation apply.

    Since:
    6.0.0
    See Also:
    Query.getResult(), Query snapshot isolation

    • Method Detail

      • getFieldNames

        List<String> getFieldNames()
        Returns the names of the fields in the result

      • getFieldTypes

        List<Class<?>> getFieldTypes()
        Returns the types of the fields in the result