--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.incubator.adba/share/classes/jdk/incubator/sql2/RowOperation.java	Mon Apr 02 14:19:45 2018 -0400
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c)  2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.incubator.sql2;
+
+import java.util.function.Consumer;
+import java.util.stream.Collector;
+
+/**
+ * A {@link RowOperation} is a database operation that returns a row sequence.
+ * 
+ * @param <T> the type of the result of this {@link Operation}
+ */
+public interface RowOperation<T> extends Operation<T> {
+
+  /**
+   * A hint to the implementation of how many rows to fetch in each database
+   * access. Implementations are free to ignore it.
+   * 
+   * @param rows suggested number of rows to fetch per access
+   * @return this {@link RowOperation}
+   * @throws IllegalArgumentException if row &lt; 1
+   * @throws IllegalStateException if this method had been called previously or
+   * this Operation has been submitted.
+   */
+  public RowOperation<T> fetchSize(long rows) throws IllegalArgumentException;
+  
+  /**
+   * Provides a {@link Collector} to reduce the sequence of rows.The result of
+   * the {@link Operation} is the result of calling finisher on the final
+   * accumulated result. If the {@link Collector} is
+   * {@link Collector.Characteristics#UNORDERED} rows may be accumulated out of
+   * order. If the {@link Collector} is
+   * {@link Collector.Characteristics#CONCURRENT} then the sequence of rows may be
+   * split into subsequences that are reduced separately and then combined.
+   *
+   * @param <A> the type of the accumulator
+   * @param <S> the type of the final result
+   * @param c the Collector. Not null. 
+   * @return This RowOperation
+   * @throws IllegalStateException if this method had been called previously or
+   * this Operation has been submitted.
+  */
+  public <A, S extends T> RowOperation<T> collect(Collector<? super Result.Row, A, S> c);
+
+  @Override
+  public RowOperation<T> onError(Consumer<Throwable> handler);
+  
+}