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new 7cfbf8a74b [INLONG-10939][SDK] Transform SQL supports STRCMP function
(#10941)
7cfbf8a74b is described below
commit 7cfbf8a74bb9570daa5171ed9300420fb37e1489
Author: Zkplo <[email protected]>
AuthorDate: Fri Aug 30 09:53:02 2024 +0800
[INLONG-10939][SDK] Transform SQL supports STRCMP function (#10941)
Co-authored-by: ZKpLo <[email protected]>
---
.../transform/process/function/StrcmpFunction.java | 67 ++++++++++++++++++++++
.../TestTransformStringFunctionsProcessor.java | 42 ++++++++++++++
2 files changed, 109 insertions(+)
diff --git
a/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/StrcmpFunction.java
b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/StrcmpFunction.java
new file mode 100644
index 0000000000..ebbcc94ae9
--- /dev/null
+++
b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/StrcmpFunction.java
@@ -0,0 +1,67 @@
+/*
+ * 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.Expression;
+import net.sf.jsqlparser.expression.Function;
+
+import java.util.List;
+
+/**
+ * StrcmpFunction
+ * description: strcmp(s1,s2)
+ * return NULL if either argument is NULL
+ * return 0 if the strings are the same
+ * return -1 if the first argument is smaller than the second according to the
current sort order
+ * return 1 otherwise
+ */
+@TransformFunction(names = {"strcmp"})
+public class StrcmpFunction implements ValueParser {
+
+ private final ValueParser leftStringParser;
+ private final ValueParser rightStringParser;
+
+ public StrcmpFunction(Function expr) {
+ List<Expression> expressions = expr.getParameters().getExpressions();
+ leftStringParser = OperatorTools.buildParser(expressions.get(0));
+ rightStringParser = OperatorTools.buildParser(expressions.get(1));
+ }
+
+ @Override
+ public Object parse(SourceData sourceData, int rowIndex, Context context) {
+ Object leftStringObj = leftStringParser.parse(sourceData, rowIndex,
context);
+ Object rightStringObj = rightStringParser.parse(sourceData, rowIndex,
context);
+ if (leftStringObj == null || rightStringObj == null) {
+ return null;
+ }
+ String leftString = OperatorTools.parseString(leftStringObj);
+ String rightString = OperatorTools.parseString(rightStringObj);
+ int cmp = OperatorTools.compareValue(leftString, rightString);
+ if (cmp > 0) {
+ return 1;
+ } else if (cmp < 0) {
+ return -1;
+ }
+ return 0;
+ }
+}
diff --git
a/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformStringFunctionsProcessor.java
b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformStringFunctionsProcessor.java
index d8576d12fc..10cfa740c9 100644
---
a/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformStringFunctionsProcessor.java
+++
b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformStringFunctionsProcessor.java
@@ -386,6 +386,48 @@ public class TestTransformStringFunctionsProcessor {
Assert.assertEquals(output7.get(0), "result=da");
}
+ @Test
+ public void testStrcmpFunction() throws Exception {
+ String transformSql = null, data = null;
+ TransformConfig config = null;
+ TransformProcessor<String, String> processor = null;
+ List<String> output = null;
+
+ transformSql = "select strcmp(string1,string2) from source";
+ config = new TransformConfig(transformSql);
+ processor = TransformProcessor
+ .create(config,
SourceDecoderFactory.createCsvDecoder(csvSource),
+ SinkEncoderFactory.createKvEncoder(kvSink));
+ // case1: strcmp('hello world','banana')
+ data = "hello world|banana|cloud|5|3|3";
+ output = processor.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output.size());
+ Assert.assertEquals("result=1", output.get(0));
+
+ // case2: strcmp('hello world','hello world')
+ data = "hello world|hello world|cloud|5|3|3";
+ output = processor.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output.size());
+ Assert.assertEquals("result=0", output.get(0));
+
+ // case3: strcmp('hello world','zzzzz')
+ data = "hello world|zzzzz|cloud|5|3|3";
+ output = processor.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output.size());
+ Assert.assertEquals("result=-1", output.get(0));
+
+ // case4: strcmp('hello world',null)
+ transformSql = "select strcmp(string1,xxd) from source";
+ config = new TransformConfig(transformSql);
+ processor = TransformProcessor
+ .create(config,
SourceDecoderFactory.createCsvDecoder(csvSource),
+ SinkEncoderFactory.createKvEncoder(kvSink));
+ data = "hello world|zzzzz|cloud|5|3|3";
+ output = processor.transform(data, new HashMap<>());
+ Assert.assertEquals(1, output.size());
+ Assert.assertEquals("result=null", output.get(0));
+ }
+
@Test
public void testRightFunction() throws Exception {
String transformSql = "select right(string1,numeric1) from source";
