Avoid unnecessary wrapping for SqlParameterValue

Closes gh-26471

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 {
@@ -83,7 +84,7 @@ public abstract class NamedParameterUtils {
 		Assert.notNull(sql, "SQL must not be null");
 
 		Set<String> namedParameters = new HashSet<>();
-		String sqlToUse = sql;
+		StringBuilder sqlToUse = new StringBuilder(sql);
 		List<ParameterHolder> parameterList = new ArrayList<>();
 
 		char[] statement = sql.toCharArray();
@@ -155,7 +156,7 @@ public abstract class NamedParameterUtils {
 					int j = i + 1;
 					if (j < statement.length && statement[j] == ':') {
 						// escaped ":" should be skipped
-						sqlToUse = sqlToUse.substring(0, i - escapes) + sqlToUse.substring(i - escapes + 1);
+						sqlToUse.deleteCharAt(i - escapes);
 						escapes++;
 						i = i + 2;
 						continue;
@@ -174,7 +175,7 @@ public abstract class NamedParameterUtils {
 			}
 			i++;
 		}
-		ParsedSql parsedSql = new ParsedSql(sqlToUse);
+		ParsedSql parsedSql = new ParsedSql(sqlToUse.toString());
 		for (ParameterHolder ph : parameterList) {
 			parsedSql.addNamedParameter(ph.getParameterName(), ph.getStartIndex(), ph.getEndIndex());
 		}
@@ -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();