WIP for QueryExecution, mostly complete

src/Microsoft.SqlTools.ServiceLayer/QueryExecution/Contracts/QueryExecuteSubsetRequest.cs

@@ -0,0 +1,55 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using System;
+using Microsoft.SqlTools.ServiceLayer.Hosting.Protocol.Contracts;
+
+namespace Microsoft.SqlTools.ServiceLayer.QueryExecution.Contracts
+{
+    /// <summary>
+    /// Parameters for a query result subset retrieval request
+    /// </summary>
+    public class QueryExecuteSubsetParams
+    {
+        /// <summary>
+        /// ID of the query to look up the results for
+        /// </summary>
+        public string OwnerId { get; set; }
+
+        /// <summary>
+        /// Index of the result set to get the results from
+        /// </summary>
+        public int ResultSetIndex { get; set; }
+
+        /// <summary>
+        /// Beginning index of the rows to return from the selected resultset. This index will be
+        /// included in the results.
+        /// </summary>
+        public int RowsStartIndex { get; set; }
+
+        /// <summary>
+        /// Number of rows to include in the result of this request. If the number of the rows 
+        /// exceeds the number of rows available after the start index, all available rows after
+        /// the start index will be returned.
+        /// </summary>
+        public int RowsCount { get; set; }
+    }
+
+    /// <summary>
+    /// Parameters for the result of a subset retrieval request
+    /// </summary>
+    public class QueryExecuteSubsetResult
+    {
+        public string Message { get; set; }
+        public ResultSetSubset ResultSubset { get; set; }
+    }
+
+    public class QueryExecuteSubsetRequest
+    {
+        public static readonly
+            RequestType<QueryExecuteSubsetParams, QueryExecuteSubsetResult> Type =
+            RequestType<QueryExecuteSubsetParams, QueryExecuteSubsetResult>.Create("query/subset");
+    }
+}