twalthr commented on code in PR #26638:
URL: https://github.com/apache/flink/pull/26638#discussion_r2132094866
##########
docs/content.zh/docs/dev/table/types.md:
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@@ -1281,15 +1293,51 @@ For some classes an annotation is required in order to
map the class to a data t
to assign a fixed precision and scale for `java.math.BigDecimal`).
{{< /tab >}}
{{< tab "Python" >}}
+```python
+Not supported.
+```
{{< /tab >}}
{{< /tabs >}}
**Declaration**
{{< tabs "c5e5527b-b09d-4dc5-9549-8fd2bfc7cc2a" >}}
-{{< tab "Java" >}}
+{{< tab "Java/Scala" >}}
+Structured types are usually declared via their implementation classes:
+
```java
-class User {
+// A simple POJO that qualifies as a structured type.
+// Note: Without a fully assigning constructor, the order of fields will be
alphabetical.
+// The final data type will be:
+// STRUCTURED<'com.myorg.Customer', active BOOLEAN, id INT NOT NULL, name
STRING, properties MAP<STRING, STRING>>
+class Customer {
+ public int id;
+ public String name;
+ public Map<String, String> properties;
+ public boolean active;
+}
+
+// A POJO with a fully assigning constructor defining the field order.
+// The final data type will be:
+// STRUCTURED<'com.myorg.Customer', id INT NOT NULL, name STRING, properties
MAP<STRING, STRING>, active BOOLEAN>
Review Comment:
exactly, primitive ints are mapped to NOT NULL during reflective extraction
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