QueryPlanNodeExtensions.cs

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// 
//  Copyright 2010-2015 Deveel
// 
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
// 
//        http://www.apache.org/licenses/LICENSE-2.0
// 
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
//

using System;
using System.Collections.Generic;
using System.IO;

using Deveel.Data.Sql.Objects;

namespace Deveel.Data.Sql.Query {
    static class QueryPlanNodeExtensions {
        public static IList<ObjectName> DiscoverTableNames(this IQueryPlanNode node) {
            var visitor = new QueryNodeTableNameVisitor();
            return visitor.Discover(node);
        }

        public static IList<QueryReference> DiscoverQueryReferences(this IQueryPlanNode node, int level) {
            return DiscoverQueryReferences(node, level, new List<QueryReference>());
        }

        public static IList<QueryReference> DiscoverQueryReferences(this IQueryPlanNode node, int level, IList<QueryReference> references) {
            // TODO:
            return references;
        }

        public static SqlBinary AsBinary(this IQueryPlanNode planNode, ISystemContext context) {
            using (var memoryStream = new MemoryStream()) {
                context.SerializeQueryPlan(planNode, memoryStream);
                memoryStream.Flush();
                return new SqlBinary(memoryStream.ToArray());
            }
        }
    }
}