slinkydeveloper commented on a change in pull request #17381:
URL: https://github.com/apache/flink/pull/17381#discussion_r718426788
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File path:
flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/utils/DataTypeUtils.java
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@@ -334,12 +334,15 @@ public static ResolvedSchema
expandCompositeTypeToSchema(DataType dataType) {
return Collections.singletonList(dataType);
}
- /** Returns the names of the flat representation in the first level of the
given data type. */
+ /**
+ * Returns the names of the flat representation of the given data type. In
case of {@link
+ * StructuredType}, returns the deep list of field names of the structure.
Review comment:
This particular method goes deep into a structured type:
https://github.com/apache/flink/blob/276e847efbfe39a567a8033dd52ff9245aee9de1/flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/logical/utils/LogicalTypeChecks.java#L483
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