jelly-1203 commented on a change in pull request #18017:
URL: https://github.com/apache/flink/pull/18017#discussion_r765624960
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File path:
flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/operations/MergeTableLikeUtil.java
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@@ -494,7 +494,13 @@ private void collectPhysicalFieldsTypes(List<SqlNode>
derivedColumns) {
boolean nullable = type.getNullable() == null ? true :
type.getNullable();
RelDataType relType = type.deriveType(sqlValidator,
nullable);
// add field name and field type to physical field list
- physicalFieldNamesToTypes.put(name, relType);
+ RelDataType oldType = physicalFieldNamesToTypes.put(name,
relType);
Review comment:
> I think it is not enough to add check here, when there is name
conflicts between computedColumn or metadata Column, the check here would not
work well. you can try to add validation in appendDerivedColumns.
Hi, @wenlong88 Thanks for your advice. I think it is very meaningful. I will
verify it first and make adjustments in time if there is any problem
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