jihoonson commented on a change in pull request #6094: Introduce SystemSchema
tables (#5989)
URL: https://github.com/apache/incubator-druid/pull/6094#discussion_r223202521
##########
File path:
sql/src/main/java/org/apache/druid/sql/calcite/planner/DruidPlanner.java
##########
@@ -309,19 +314,88 @@ private PlannerResult planWithBindableConvention(
} else {
final BindableRel theRel = bindableRel;
final DataContext dataContext =
plannerContext.createDataContext((JavaTypeFactory) planner.getTypeFactory());
- final Supplier<Sequence<Object[]>> resultsSupplier = new
Supplier<Sequence<Object[]>>()
- {
- @Override
- public Sequence<Object[]> get()
- {
- final Enumerable enumerable = theRel.bind(dataContext);
- return Sequences.simple(enumerable);
- }
- };
+
+ final Supplier<Sequence<Object[]>> resultsSupplier = () -> new
BaseSequence<>(
+ new BaseSequence.IteratorMaker<Object[],
CloseableEnumerableIterator>()
+ {
+ @Override
+ public CloseableEnumerableIterator make()
+ {
+ final Enumerable enumerable = theRel.bind(dataContext);
+ final Enumerator enumerator = enumerable.enumerator();
+ return new CloseableEnumerableIterator(new Iterator<Object[]>()
Review comment:
I'm not saying closing the iterator is not needed. The same algorithm can be
implemented using `Sequences.withBaggage()` , so `CloseableEnumerableIterator`
itself is not needed. `Sequences.withBaggage()` wraps the underlying sequence
and calls the given `closeable` after iterating all elements in the sequence.
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