michaelmior commented on a change in pull request #2021:
URL: https://github.com/apache/calcite/pull/2021#discussion_r442893261
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File path: core/src/main/java/org/apache/calcite/rel/externalize/RelJson.java
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@@ -271,7 +271,9 @@ public RelDataType toType(RelDataTypeFactory typeFactory,
Object o) {
public Object toJson(AggregateCall node) {
final Map<String, Object> map = jsonBuilder.map();
- map.put("agg", toJson(node.getAggregation()));
+ Map<String, Object> aggMap = new HashMap(toJson(node.getAggregation()));
+ aggMap.put("class", node.getAggregation().getClass().getName());
Review comment:
Where is this `class` attribute used? It doesn't seem to be in
[`RelJsonWriter#toAggCall`](https://github.com/apache/calcite/blob/e7d8d86dd3ab971921f5122de6c95868dec8739c/core/src/main/java/org/apache/calcite/rel/externalize/RelJsonReader.java#L278).
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