HHH-11455 - Do not use schema name when underlying database doesn't support It

Use JDBC Environment to get the qualified name of the table, instead of directly appending schema name when it is defined explicitly.

Author: BOOTMGR

hibernate-core/src/main/java/org/hibernate/mapping/Table.java

@@ -17,12 +17,14 @@
 
 import org.hibernate.HibernateException;
 import org.hibernate.MappingException;
+import org.hibernate.boot.Metadata;
 import org.hibernate.boot.model.naming.Identifier;
 import org.hibernate.boot.model.relational.Exportable;
 import org.hibernate.boot.model.relational.InitCommand;
 import org.hibernate.boot.model.relational.Namespace;
 import org.hibernate.boot.model.relational.QualifiedTableName;
 import org.hibernate.dialect.Dialect;
+import org.hibernate.engine.jdbc.env.spi.JdbcEnvironment;
 import org.hibernate.engine.jdbc.env.spi.QualifiedObjectNameFormatter;
 import org.hibernate.engine.spi.Mapping;
 import org.hibernate.internal.util.StringHelper;
@@ -438,13 +440,20 @@ public void validateColumns(Dialect dialect, Mapping mapping, TableMetadata tabl
 
 	public Iterator sqlAlterStrings(
 			Dialect dialect,
-			Mapping p,
+			Metadata metadata,
 			TableInformation tableInfo,
 			String defaultCatalog,
 			String defaultSchema) throws HibernateException {
+		
+		final JdbcEnvironment jdbcEnvironment = metadata.getDatabase().getJdbcEnvironment();
 
 		StringBuilder root = new StringBuilder( "alter table " )
-				.append( getQualifiedName( dialect, defaultCatalog, defaultSchema ) )
+				.append( 
+						jdbcEnvironment.getQualifiedObjectNameFormatter().format(
+								tableInfo.getName(),
+								dialect
+						) 
+				)
 				.append( ' ' )
 				.append( dialect.getAddColumnString() );
 
@@ -461,7 +470,7 @@ public Iterator sqlAlterStrings(
 						.append( ' ' )
 						.append( column.getQuotedName( dialect ) )
 						.append( ' ' )
-						.append( column.getSqlType( dialect, p ) );
+						.append( column.getSqlType( dialect, metadata ) );
 
 				String defaultValue = column.getDefaultValue();
 				if ( defaultValue != null ) {