autophagy commented on code in PR #28212:
URL: https://github.com/apache/flink/pull/28212#discussion_r3281074557
##########
docs/content.zh/docs/dev/table/functions/ptfs.md:
##########
@@ -2275,6 +2275,110 @@ void testScalarOnly() throws Exception {
{{< /tab >}}
{{< /tabs >}}
+#### Testing with State
+
+The harness supports structured types, `ListView`, and `MapView`:
+
+{{< tabs "state-testing" >}}
+{{< tab "Java" >}}
+```java
+@DataTypeHint("ROW<name STRING, count BIGINT>")
+public class CounterPTF extends ProcessTableFunction<Row> {
+ public static class CountState {
+ public long count = 0L;
+ }
+
+ public void eval(
+ @StateHint CountState state,
+ @ArgumentHint(ArgumentTrait.SET_SEMANTIC_TABLE) Row input) {
+ state.count++;
+ String name = input.getFieldAs("name");
+ collect(Row.of(name, state.count));
+ }
+}
+
+@Test
+void testWithState() throws Exception {
+ try (ProcessTableFunctionTestHarness<Row> harness =
+ ProcessTableFunctionTestHarness.ofClass(CounterPTF.class)
+ .withTableArgument("input", DataTypes.of("ROW<name STRING, value INT>"))
+ .withPartitionBy("input", "name")
+ .build()) {
+
+ harness.processElement(Row.of("Alice", 10));
+ harness.processElement(Row.of("Alice", 20));
+
+ List<Row> output = harness.getOutput();
+ assertThat(output.get(0)).isEqualTo(Row.of("Alice", 1L));
+ assertThat(output.get(1)).isEqualTo(Row.of("Alice", 2L));
+ }
+}
+```
+{{< /tab >}}
+{{< /tabs >}}
+
+**Initial State Setup**: Use `.withInitialStateArgument()` to pre-populate
state before processing:
Review Comment:
Yeah, I like renaming to something like `withInitialStateForKey` much more
than the current. Will add this!
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
