ibzib commented on a change in pull request #13745:
URL: https://github.com/apache/beam/pull/13745#discussion_r556773137
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File path:
sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/transform/BeamBuiltinAggregations.java
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@@ -397,40 +397,54 @@ public Long extractOutput(Long accum) {
* <p>Note: null values are ignored when mixed with non-null values.
* (https://issues.apache.org/jira/browse/BEAM-10379)
*/
- static class BitAnd<T extends Number> extends CombineFn<T, Long, Long> {
- // Indicate if input only contains null value.
- private boolean isEmpty = true;
+ static class BitAnd<T extends Number> extends CombineFn<T, BitAnd.Accum,
Long> {
+ static class Accum {
+ /** True if no inputs have been seen yet. */
+ boolean isEmpty = true;
+ /** True if any null inputs have been seen. */
+ boolean isNull = false;
+ /** The bitwise-and of the inputs seen so far. */
+ long bitAnd = -1L;
+ }
@Override
- public Long createAccumulator() {
- return -1L;
+ public Accum createAccumulator() {
+ return new Accum();
}
@Override
- public Long addInput(Long accum, T input) {
- if (input != null) {
- this.isEmpty = false;
- return accum & input.longValue();
- } else {
- return null;
+ public Accum addInput(Accum accum, T input) {
+ if (input == null) {
Review comment:
It's not strictly necessary, but I added it for clarity.
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