HHH-15102 allow -- style comments in native SQL query

Author: gavinking

hibernate-core/src/main/java/org/hibernate/engine/jdbc/internal/BasicFormatterImpl.java

@@ -69,8 +69,16 @@ public String perform() {
 
 			while ( tokens.hasMoreTokens() ) {
 				token = tokens.nextToken();
-				lcToken = token.toLowerCase(Locale.ROOT);
 
+				if ( "-".equals(token) && result.toString().endsWith("-") ) {
+					do {
+						result.append( token );
+						token = tokens.nextToken();
+					}
+					while ( !"\n".equals( token ) && tokens.hasMoreTokens() );
+				}
+
+				lcToken = token.toLowerCase(Locale.ROOT);
 				switch (lcToken) {
 
 					case "'":

hibernate-core/src/test/java/org/hibernate/orm/test/sql/hand/query/NativeSQLQueriesTest.java

@@ -836,6 +836,12 @@ public void testAddJoinForManyToMany(SessionFactoryScope scope) {
 		);
 	}
 
+	@Test @JiraKey( "HHH-15102" )
+	@SkipForDialect(dialectClass = MySQLDialect.class, matchSubTypes = true)
+	public void testCommentInSQLQuery(SessionFactoryScope scope) {
+		scope.inTransaction( s -> s.createNativeQuery( "select sum(1) --count(*), effectively\nfrom ORGANIZATION" ).getSingleResult() );
+	}
+
 	@Test
 	public void testTextTypeInSQLQuery(SessionFactoryScope scope) {
 		String description = buildLongString( 15000, 'a' );