JackieTien97 commented on code in PR #15577:
URL: https://github.com/apache/iotdb/pull/15577#discussion_r2309289100
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example/udf/src/main/java/org/apache/iotdb/udf/UDAFMKIdentify.java:
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@@ -0,0 +1,171 @@
+package org.apache.iotdb.udf;
+
+import org.apache.iotdb.udf.api.State;
+import org.apache.iotdb.udf.api.customizer.analysis.AggregateFunctionAnalysis;
+import org.apache.iotdb.udf.api.customizer.parameter.FunctionArguments;
+import org.apache.iotdb.udf.api.exception.UDFArgumentNotValidException;
+import org.apache.iotdb.udf.api.relational.AggregateFunction;
+import org.apache.iotdb.udf.api.relational.access.Record;
+import org.apache.iotdb.udf.api.type.Type;
+import org.apache.iotdb.udf.api.utils.ResultValue;
+import org.apache.iotdb.udf.table.MatchingKeyState;
+
+import org.apache.tsfile.utils.Binary;
+
+import java.nio.charset.Charset;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * This is a UDAF function used to identify sets of matching keys that satisfy
user-defined
+ * constraints.
+ */
+public class UDAFMKIdentify implements AggregateFunction {
+ /**
+ * CREATE DATABASE root; USE root; CREATE TABLE test ( Time TIMESTAMP TIME,
PlateText TEXT FIELD,
+ * VehicleID TEXT FIELD, CameraID TEXT FIELD ) WITH (TTL=31536000000);
INSERT INTO test(Time,
+ * "PlateText", "VehicleID", "CameraID") values
('2025-01-01T01:56:19.000+08:00', 'B0D3O444s',
+ * '100', '78'); INSERT INTO test(Time, "PlateText", "VehicleID",
"CameraID") values
+ * ('2025-01-01T01:56:39.000+08:00', 'B0D3O444s', '100', '78'); INSERT INTO
test(Time,
+ * "PlateText", "VehicleID", "CameraID") values
('2025-01-01T03:30:59.000+08:00', 'B0134s00', '2',
+ * '150');
+ *
+ * <p>CREATE FUNCTION mkidentify AS 'org.apache.iotdb.udf.UDAFMK'; SHOW
FUNCTIONS;
+ *
+ * <p>SELECT mkidentify(Time, PlateText, VehicleID, CameraID, 2, 0.2, 1.0)
FROM root.test;
+ */
Review Comment:
It's an IT case, shouldn't put it in source code, we need to move it to
integration-test/src/test/java/org/apache/iotdb/relational/it/udaf/
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