Stop aliasing MariaDB to MySQL

Closes gh-28728

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/integration/IntegrationDataSourceScriptDatabaseInitializer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -20,6 +20,7 @@ import java.util.List;
 
 import javax.sql.DataSource;
 
+import org.springframework.boot.jdbc.DatabaseDriver;
 import org.springframework.boot.jdbc.init.DataSourceScriptDatabaseInitializer;
 import org.springframework.boot.jdbc.init.PlatformPlaceholderDatabaseDriverResolver;
 import org.springframework.boot.sql.init.DatabaseInitializationSettings;
@@ -77,6 +78,7 @@ public class IntegrationDataSourceScriptDatabaseInitializer extends DataSourceSc
 
 	private static List<String> resolveSchemaLocations(DataSource dataSource, IntegrationProperties.Jdbc properties) {
 		PlatformPlaceholderDatabaseDriverResolver platformResolver = new PlatformPlaceholderDatabaseDriverResolver();
+		platformResolver = platformResolver.withDriverPlatform(DatabaseDriver.MARIADB, "mysql");
 		if (StringUtils.hasText(properties.getPlatform())) {
 			return platformResolver.resolveAll(properties.getPlatform(), properties.getSchema());
 		}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/JdbcSessionDataSourceScriptDatabaseInitializer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -20,6 +20,7 @@ import java.util.List;
 
 import javax.sql.DataSource;
 
+import org.springframework.boot.jdbc.DatabaseDriver;
 import org.springframework.boot.jdbc.init.DataSourceScriptDatabaseInitializer;
 import org.springframework.boot.jdbc.init.PlatformPlaceholderDatabaseDriverResolver;
 import org.springframework.boot.sql.init.DatabaseInitializationSettings;
@@ -78,6 +79,7 @@ public class JdbcSessionDataSourceScriptDatabaseInitializer extends DataSourceSc
 
 	private static List<String> resolveSchemaLocations(DataSource dataSource, JdbcSessionProperties properties) {
 		PlatformPlaceholderDatabaseDriverResolver platformResolver = new PlatformPlaceholderDatabaseDriverResolver();
+		platformResolver = platformResolver.withDriverPlatform(DatabaseDriver.MARIADB, "mysql");
 		if (StringUtils.hasText(properties.getPlatform())) {
 			return platformResolver.resolveAll(properties.getPlatform(), properties.getSchema());
 		}

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/jdbc/DatabaseDriver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -74,13 +74,7 @@ public enum DatabaseDriver {
 	/**
 	 * Maria DB.
 	 */
-	MARIADB("MariaDB", "org.mariadb.jdbc.Driver", "org.mariadb.jdbc.MariaDbDataSource", "SELECT 1") {
-
-		@Override
-		public String getId() {
-			return "mysql";
-		}
-	},
+	MARIADB("MariaDB", "org.mariadb.jdbc.Driver", "org.mariadb.jdbc.MariaDbDataSource", "SELECT 1"),
 
 	/**
 	 * Google App Engine.