zstan commented on a change in pull request #9070:
URL: https://github.com/apache/ignite/pull/9070#discussion_r642789988
##########
File path:
modules/calcite/src/main/java/org/apache/ignite/internal/processors/query/calcite/exec/exp/agg/Accumulators.java
##########
@@ -1003,4 +1016,53 @@ private DecimalMinMax(boolean min) {
return
typeFactory.createTypeWithNullability(typeFactory.createSqlType(DECIMAL), true);
}
}
+
+ /** */
+ private static class DistinctAccumulator implements Accumulator {
+ /** */
+ private final Accumulator acc;
+
+ /** */
+ private final Set<Object> set = new HashSet<>();
+
+ /** */
+ private DistinctAccumulator(Supplier<Accumulator> accSup) {
+ this.acc = accSup.get();
+ }
+
+ /** {@inheritDoc} */
+ @Override public void add(Object... args) {
+ Object in = args[0];
+
+ if (in == null)
+ return;
+
+ set.add(in);
+ }
+
+ /** {@inheritDoc} */
+ @Override public void apply(Accumulator other) {
+ DistinctAccumulator other0 = (DistinctAccumulator) other;
Review comment:
space is redundant in cast.
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