[INLONG-10984][SDK] Transform support RADIANS(x) function

inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/RadiansFunction.java

@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.inlong.sdk.transform.process.function;
+
+import org.apache.inlong.sdk.transform.decode.SourceData;
+import org.apache.inlong.sdk.transform.process.Context;
+import org.apache.inlong.sdk.transform.process.operator.OperatorTools;
+import org.apache.inlong.sdk.transform.process.parser.ValueParser;
+
+import net.sf.jsqlparser.expression.Function;
+
+@TransformFunction(names = {"radians"})
+public class RadiansFunction implements ValueParser {
+
+    private ValueParser degreeParser;
+
+    public RadiansFunction(Function expr) {
+        degreeParser = OperatorTools.buildParser(expr.getParameters().getExpressions().get(0));
+    }
+
+    @Override
+    public Object parse(SourceData sourceData, int rowIndex, Context context) {
+        Object degreeObj = degreeParser.parse(sourceData, rowIndex, context);
+        if (degreeObj == null) {
+            return null;
+        }
+        return Math.toRadians(OperatorTools.parseBigDecimal(degreeObj).doubleValue());
+    }
+}

inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformArithmeticFunctionsProcessor.java

@@ -422,6 +422,23 @@ public void testLnFunction() throws Exception {
         Assert.assertEquals(output2.get(0), "result=2.302585092994046");
     }
 
+    @Test
+    public void testRadiansFunction() throws Exception {
+        String transformSql = "select radians(numeric1) from source";
+        TransformConfig config = new TransformConfig(transformSql);
+        TransformProcessor<String, String> processor = TransformProcessor
+                .create(config, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        // case1: radians(10)
+        List<String> output1 = processor.transform("10|4|6|8", new HashMap<>());
+        Assert.assertEquals(1, output1.size());
+        Assert.assertEquals(output1.get(0), "result=0.17453292519943295");
+        // case2: radians(18.97)
+        List<String> output2 = processor.transform("18.97|4|6|8", new HashMap<>());
+        Assert.assertEquals(1, output2.size());
+        Assert.assertEquals(output2.get(0), "result=0.33108895910332425");
+    }
+
     @Test
     public void testLog10Function() throws Exception {
         String transformSql = "select log10(numeric1) from source";