SteNicholas commented on a change in pull request #19179:
URL: https://github.com/apache/flink/pull/19179#discussion_r831998386
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File path:
flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/nodes/exec/serde/RexNodeJsonSerializer.java
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@@ -397,6 +398,9 @@ static void serializeSqlOperator(
// stack is exposed to the user and can thus be external.
gen.writeStringField(
FIELD_NAME_INTERNAL_NAME,
BuiltInSqlOperator.toQualifiedName(operator));
+ if (operator.getName().isEmpty()) {
Review comment:
Why does `FIELD_NAME_SQL_KIND` field need the check whether the operator
name is empty?
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