JoinTableTests.cs

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// 
//  Copyright 2010-2014 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 Deveel.Data;
using Deveel.Data.Sql.Expressions;
using Deveel.Data.Sql.Objects;
using Deveel.Data.Sql.Tables;
using Deveel.Data.Types;

using NUnit.Framework;

namespace Deveel.Data.Sql {
    [TestFixture]
    public class JoinTableTests : ContextBasedTest {
        protected override void OnSetUp(string testName) {
            CreateTestTables();
            AddTestData();
        }

        private void AddTestData() {
            var table = Query.GetMutableTable(new ObjectName(new ObjectName("APP"), "persons"));

            var row = table.NewRow();
            row["person_id"] = DataObject.Integer(1);
            row["name"] = DataObject.String("Antonello Provenzano");
            row["age"] = DataObject.Integer(34);
            table.AddRow(row);

            row = table.NewRow();
            row["person_id"] = DataObject.Integer(3);
            row["name"] = DataObject.String("John Doe");
            row["age"] = DataObject.Integer(56);
            table.AddRow(row);

            table = Query.GetMutableTable(new ObjectName(new ObjectName("APP"), "codes"));
            row = table.NewRow();
            row["person_id"] = DataObject.Integer(1);
            row["code"] = DataObject.String("123456");
            row["registered"] = DataObject.Date(new SqlDateTime(2014, 01, 12));
            table.AddRow(row);
        }

        private void CreateTestTables() {
            var tableInfo = CreateFirstTable();
            Query.CreateTable(tableInfo);
            Query.AddPrimaryKey(tableInfo.TableName, "person_id");

            tableInfo = CreateSecondTable();
            Query.CreateTable(tableInfo);
        }

        private TableInfo CreateSecondTable() {
            var tableInfo = new TableInfo(new ObjectName(new ObjectName("APP"), "codes"));
            tableInfo.AddColumn("person_id", PrimitiveTypes.Integer());
            tableInfo.AddColumn("code", PrimitiveTypes.String());
            tableInfo.AddColumn("registered", PrimitiveTypes.DateTime());

            return tableInfo;
        }

        private TableInfo CreateFirstTable() {
            var tableInfo = new TableInfo(new ObjectName(new ObjectName("APP"), "persons"));
            tableInfo.AddColumn("person_id", PrimitiveTypes.Integer());
            tableInfo.AddColumn("name", PrimitiveTypes.String());
            tableInfo.AddColumn("age", PrimitiveTypes.Integer());

            return tableInfo;
        }

        [Test]
        public void NaturalInnerJoin() {
            SqlExpression expression = null;
            Assert.DoesNotThrow(() => expression = SqlExpression.Parse("SELECT * FROM persons, codes"));
            Assert.IsNotNull(expression);
            Assert.IsInstanceOf<SqlQueryExpression>(expression);

            SqlExpression resultExpression = null;
            Assert.DoesNotThrow(() => resultExpression = expression.Evaluate(Query, null));
            Assert.IsNotNull(resultExpression);
            Assert.IsInstanceOf<SqlConstantExpression>(resultExpression);

            var constantExpression = (SqlConstantExpression) resultExpression;
            Assert.IsInstanceOf<QueryType>(constantExpression.Value.Type);

            var queryPlan = ((SqlQueryObject) constantExpression.Value.Value);
            ITable result = null;

            Assert.DoesNotThrow(() => result = queryPlan.QueryPlan.Evaluate(Query));

            Assert.IsNotNull(result);
        }
    }
}