benWize commented on a change in pull request #15174:
URL: https://github.com/apache/beam/pull/15174#discussion_r702196988
##########
File path:
sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/transform/BeamBuiltinAggregations.java
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@@ -163,6 +167,32 @@ static CombineFn createSum(Schema.FieldType fieldType) {
}
}
+ /**
+ * {@link CombineFn} for Sum0 where sum of null returns 0 based on {@link
Sum} and {@link
+ * Combine.BinaryCombineFn}.
+ */
+ static CombineFn createSum0(Schema.FieldType fieldType) {
+ switch (fieldType.getTypeName()) {
+ case INT32:
+ return new IntegerSum0();
+ case INT16:
+ return new ShortSum0();
+ case BYTE:
+ return new ByteSum0();
+ case INT64:
+ return new LongSum0();
+ case FLOAT:
+ return new FloatSum0();
+ case DOUBLE:
+ return new DoubleSum0();
+ case DECIMAL:
+ return new BigDecimalSum0();
+ default:
+ throw new UnsupportedOperationException(
+ String.format("[%s] is not supported in SUM", fieldType));
Review comment:
Fixed
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