Avoid unnecessary wrapping for SqlParameterValue

Fix https://github.com/spring-projects/spring-framework/issues/26467

spring-jdbc/src/main/java/org/springframework/jdbc/core/namedparam/NamedParameterUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -36,6 +36,7 @@ import org.springframework.util.Assert;
  *
  * @author Thomas Risberg
  * @author Juergen Hoeller
+ * @author Yanming Zhou
  * @since 2.0
  */
 public abstract class NamedParameterUtils {
@@ -346,8 +347,14 @@ public abstract class NamedParameterUtils {
 			String paramName = paramNames.get(i);
 			try {
 				SqlParameter param = findParameter(declaredParams, paramName, i);
-				paramArray[i] = (param != null ? new SqlParameterValue(param, paramSource.getValue(paramName)) :
-						SqlParameterSourceUtils.getTypedValue(paramSource, paramName));
+				Object paramValue = paramSource.getValue(paramName);
+				if (paramValue instanceof SqlParameterValue) {
+					paramArray[i] = paramValue;
+				} 
+				else {
+					paramArray[i] = (param != null ? new SqlParameterValue(param, paramValue) :
+							SqlParameterSourceUtils.getTypedValue(paramSource, paramName));
+				}
 			}
 			catch (IllegalArgumentException ex) {
 				throw new InvalidDataAccessApiUsageException(

spring-jdbc/src/test/java/org/springframework/jdbc/core/namedparam/NamedParameterUtilsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +23,7 @@ import java.util.Map;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.dao.InvalidDataAccessApiUsageException;
+import org.springframework.jdbc.core.SqlParameterValue;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
@@ -32,6 +33,7 @@ import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
  * @author Juergen Hoeller
  * @author Rick Evans
  * @author Artur Geraschenko
+ * @author Yanming Zhou
  */
 public class NamedParameterUtilsTests {
 
@@ -96,6 +98,20 @@ public class NamedParameterUtilsTests {
 				.buildSqlTypeArray(NamedParameterUtils.parseSqlStatement("xxx :a :b :c xx :a :b"), namedParams)[4]).isEqualTo(2);
 	}
 
+	@Test
+	public void convertSqlParameterValueToArray() {
+		SqlParameterValue sqlParameterValue = new SqlParameterValue(2, "b");
+		Map<String, Object> paramMap = new HashMap<>();
+		paramMap.put("a", "a");
+		paramMap.put("b", sqlParameterValue);
+		paramMap.put("c", "c");
+		assertThat(NamedParameterUtils.buildValueArray("xxx :a :b :c xx :a :b", paramMap)[4]).isSameAs(sqlParameterValue);
+		MapSqlParameterSource namedParams = new MapSqlParameterSource();
+		namedParams.addValue("a", "a", 1).addValue("b", sqlParameterValue).addValue("c", "c", 3);
+		assertThat(NamedParameterUtils
+				.buildValueArray(NamedParameterUtils.parseSqlStatement("xxx :a :b :c xx :a :b"), namedParams, null)[4]).isSameAs(sqlParameterValue);
+	}
+
 	@Test
 	public void convertTypeMapToSqlParameterList() {
 		MapSqlParameterSource namedParams = new MapSqlParameterSource();