yanlin-Lynn commented on a change in pull request #1372: [CALCITE-3246]
NullPointerException while deserializing udf operator.
URL: https://github.com/apache/calcite/pull/1372#discussion_r313856954
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File path: core/src/main/java/org/apache/calcite/rel/externalize/RelJson.java
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@@ -438,15 +438,17 @@ RexNode toRex(RelInput relInput, Object o) {
} else if (o instanceof Map) {
Map map = (Map) o;
final Map<String, Object> opMap = (Map) map.get("op");
+ if (map.containsKey("class")) {
+ opMap.put("class", map.get("class"));
+ }
final RelDataTypeFactory typeFactory = cluster.getTypeFactory();
Review comment:
@chunweilei thanks for point out. better to move it down inside `if(opMap
!= null)` block.
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