HHH-18332 Fix DB2 support for procedure output ref_cursors parameters

Author: mbellade

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/DB2LegacyDialect.java

@@ -777,11 +777,24 @@ static String selectNullString(int sqlType) {
 		return "nullif(" + literal + "," + literal + ')';
 	}
 
+	@Override
+	public Boolean supportsRefCursors() {
+		// DB2 supports the binding with Types.REF_CURSOR but doesn't support statement.getObject(position, ResultSet.class)
+		return false;
+	}
+
 	@Override
 	public int registerResultSetOutParameter(CallableStatement statement, int col) throws SQLException {
+		statement.registerOutParameter( col++, Types.REF_CURSOR );
 		return col;
 	}
 
+	@Override
+	public int registerResultSetOutParameter(CallableStatement statement, String name) throws SQLException {
+		statement.registerOutParameter( name, Types.REF_CURSOR );
+		return 1;
+	}
+
 	@Override
 	public ResultSet getResultSet(CallableStatement ps) throws SQLException {
 		boolean isResultSet = ps.execute();
@@ -793,6 +806,16 @@ public ResultSet getResultSet(CallableStatement ps) throws SQLException {
 		return ps.getResultSet();
 	}
 
+	@Override
+	public ResultSet getResultSet(CallableStatement statement, int position) throws SQLException {
+		return (ResultSet) statement.getObject( position );
+	}
+
+	@Override
+	public ResultSet getResultSet(CallableStatement statement, String name) throws SQLException {
+		return (ResultSet) statement.getObject( name );
+	}
+
 	@Override
 	public boolean supportsCommentOn() {
 		return true;

hibernate-core/src/main/java/org/hibernate/dialect/DB2Dialect.java

@@ -843,11 +843,24 @@ public static String selectNullString(int sqlType) {
 		return "nullif(" + literal + "," + literal + ')';
 	}
 
+	@Override
+	public Boolean supportsRefCursors() {
+		// DB2 supports the binding with Types.REF_CURSOR but doesn't support statement.getObject(position, ResultSet.class)
+		return false;
+	}
+
 	@Override
 	public int registerResultSetOutParameter(CallableStatement statement, int col) throws SQLException {
+		statement.registerOutParameter( col++, Types.REF_CURSOR );
 		return col;
 	}
 
+	@Override
+	public int registerResultSetOutParameter(CallableStatement statement, String name) throws SQLException {
+		statement.registerOutParameter( name, Types.REF_CURSOR );
+		return 1;
+	}
+
 	@Override
 	public ResultSet getResultSet(CallableStatement ps) throws SQLException {
 		boolean isResultSet = ps.execute();
@@ -859,6 +872,16 @@ public ResultSet getResultSet(CallableStatement ps) throws SQLException {
 		return ps.getResultSet();
 	}
 
+	@Override
+	public ResultSet getResultSet(CallableStatement statement, int position) throws SQLException {
+		return (ResultSet) statement.getObject( position );
+	}
+
+	@Override
+	public ResultSet getResultSet(CallableStatement statement, String name) throws SQLException {
+		return (ResultSet) statement.getObject( name );
+	}
+
 	@Override
 	public boolean supportsCommentOn() {
 		return true;