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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
namespace System.Data.Entity.Query.LinqToEntities
{
using System.Data.Entity.TestModels.ArubaModel;
using System.Linq;
using Xunit;
public class GroupByOptimizationTests : FunctionalTestBase
{
[Fact]
public void GroupBy_is_optimized_when_projecting_group_key()
{
var expectedSql =
@"SELECT
[Distinct1].[FirstName] AS [FirstName]
FROM ( SELECT DISTINCT
[Extent1].[FirstName] AS [FirstName]
FROM [dbo].[ArubaOwners] AS [Extent1]
) AS [Distinct1]";
using (var context = new ArubaContext())
{
var query = context.Owners.GroupBy(o => o.FirstName).Select(g => g.Key);
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
var results = query.ToList();
var expected = context.Owners.ToList().GroupBy(o => o.FirstName).Select(g => g.Key).ToList();
QueryTestHelpers.VerifyQueryResult(expected, results, (o, i) => o == i);
}
}
[Fact]
public void GroupBy_is_optimized_when_projecting_group_count()
{
var expectedSql =
@"SELECT
[GroupBy1].[A1] AS [C1]
FROM ( SELECT
[Extent1].[FirstName] AS [K1],
COUNT(1) AS [A1]
FROM [dbo].[ArubaOwners] AS [Extent1]
GROUP BY [Extent1].[FirstName]
) AS [GroupBy1]";
using (var context = new ArubaContext())
{
var query = context.Owners.GroupBy(o => o.FirstName).Select(g => g.Count());
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
var results = query.ToList();
var expected = context.Owners.ToList().GroupBy(o => o.FirstName).Select(g => g.Count()).ToList();
QueryTestHelpers.VerifyQueryResult(expected, results, (o, i) => o == i);
}
}
[Fact]
public void GroupBy_is_optimized_when_projecting_expression_containing_group_key()
{
var expectedSql =
@"SELECT
[Extent1].[Id] * 2 AS [C1]
FROM [dbo].[ArubaOwners] AS [Extent1]";
using (var context = new ArubaContext())
{
var query = context.Owners.GroupBy(o => o.Id).Select(g => g.Key * 2);
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
var results = query.ToList();
var expected = context.Owners.ToList().GroupBy(o => o.Id).Select(g => g.Key * 2).ToList();
QueryTestHelpers.VerifyQueryResult(expected, results, (o, i) => o == i);
}
}
[Fact]
public void GroupBy_is_optimized_when_projecting_aggregate_on_the_group()
{
var expectedSql =
@"SELECT
[GroupBy1].[A1] AS [C1]
FROM ( SELECT
[Extent1].[FirstName] AS [K1],
MAX([Extent1].[Id]) AS [A1]
FROM [dbo].[ArubaOwners] AS [Extent1]
GROUP BY [Extent1].[FirstName]
) AS [GroupBy1]";
using (var context = new ArubaContext())
{
var query = context.Owners.GroupBy(o => o.FirstName).Select(g => g.Max(p => p.Id));
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
var results = query.ToList();
var expected = context.Owners.ToList().GroupBy(o => o.FirstName).Select(g => g.Max(p => p.Id)).ToList();
QueryTestHelpers.VerifyQueryResult(expected, results, (o, i) => o == i);
}
}
[Fact]
public void GroupBy_is_optimized_when_projecting_anonymous_type_containing_group_key_and_group_aggregate()
{
var expectedSql =
@"SELECT
1 AS [C1],
[GroupBy1].[K1] AS [FirstName],
[GroupBy1].[A1] AS [C2]
FROM ( SELECT
[Extent1].[FirstName] AS [K1],
MAX([Extent1].[Id]) AS [A1]
FROM [dbo].[ArubaOwners] AS [Extent1]
GROUP BY [Extent1].[FirstName]
) AS [GroupBy1]";
using (var context = new ArubaContext())
{
var query = context.Owners.GroupBy(o => o.FirstName).Select(g => new { Key = g.Key, Aggregate = g.Max(p => p.Id) });
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
var results = query.ToList();
var expected = context.Owners.ToList().GroupBy(o => o.FirstName).Select(g => new { Key = g.Key, Aggregate = g.Max(p => p.Id) }).ToList();
QueryTestHelpers.VerifyQueryResult(expected, results, (o, i) => o.Key == i.Key && o.Aggregate == i.Aggregate);
}
}
[Fact]
public void GroupBy_is_optimized_when_projecting_anonymous_type_containing_group_key_and_multiple_group_aggregates()
{
var expectedSql =
@"SELECT
1 AS [C1],
[GroupBy1].[K1] AS [FirstName],
[GroupBy1].[A1] AS [C2],
[GroupBy1].[A2] AS [C3]
FROM ( SELECT
[Extent1].[K1] AS [K1],
MAX([Extent1].[A1]) AS [A1],
MIN([Extent1].[A2]) AS [A2]
FROM ( SELECT
[Extent1].[FirstName] AS [K1],
[Extent1].[Id] AS [A1],
[Extent1].[Id] + 2 AS [A2]
FROM [dbo].[ArubaOwners] AS [Extent1]
) AS [Extent1]
GROUP BY [K1]
) AS [GroupBy1]";
using (var context = new ArubaContext())
{
var query = context.Owners.GroupBy(o => o.FirstName).Select(g => new { key1 = g.Key, key2 = g.Key, max = g.Max(p => p.Id), min = g.Min(s => s.Id + 2) });
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
var results = query.ToList();
var expected = context.Owners.ToList().GroupBy(o => o.FirstName).Select(g => new { key1 = g.Key, key2 = g.Key, max = g.Max(p => p.Id), min = g.Min(s => s.Id + 2) }).ToList();
QueryTestHelpers.VerifyQueryResult(expected, results, (o, i) => o.key1 == i.key1 && o.key2 == i.key2 && o.max == i.max && o.min == i.min);
}
}
[Fact]
public void GroupBy_is_optimized_when_projecting_conditional_expression_containing_group_key()
{
var expectedSql =
@"SELECT
1 AS [C1],
CASE WHEN ([Distinct1].[FirstName] IS NULL) THEN N'is null' ELSE N'not null' END AS [C2],
CASE WHEN (((@p__linq__0 = 1) AND (@p__linq__1 = 1)) OR ((@p__linq__2 = 1) AND (@p__linq__3 = 1))) THEN cast(1 as bit) WHEN ( NOT (((@p__linq__0 = 1) AND (@p__linq__1 = 1)) OR ((@p__linq__2 = 1) AND (@p__linq__3 = 1)))) THEN cast(0 as bit) END AS [C3]
FROM ( SELECT DISTINCT
[Extent1].[FirstName] AS [FirstName]
FROM [dbo].[ArubaOwners] AS [Extent1]
) AS [Distinct1]
/*
Boolean p__linq__0 = True
Boolean p__linq__1 = False
Boolean p__linq__2 = False
Boolean p__linq__3 = True
*/";
bool a = true;
bool b = false;
bool c = true;
using (var context = new ArubaContext())
{
var query = context.Owners.GroupBy(o => o.FirstName).Select(g => new { keyIsNull = g.Key == null ? "is null" : "not null", logicExpression = (a && b || b && c) });
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
var results = query.ToList();
var expected = context.Owners.ToList().GroupBy(o => o.FirstName).Select(g => new { keyIsNull = g.Key == null ? "is null" : "not null", logicExpression = (a && b || b && c) }).ToList();
QueryTestHelpers.VerifyQueryResult(expected, results, (o, i) => o.keyIsNull == i.keyIsNull && o.logicExpression == i.logicExpression);
}
}
[Fact]
public void GroupBy_is_optimized_when_filerting_and_projecting_anonymous_type_with_group_key_and_function_aggregate()
{
var expectedSql =
@"SELECT
1 AS [C1],
[GroupBy1].[K1] AS [FirstName],
[GroupBy1].[A1] AS [C2]
FROM ( SELECT
[Extent1].[FirstName] AS [K1],
AVG( CAST( [Extent1].[Id] AS float)) AS [A1]
FROM [dbo].[ArubaOwners] AS [Extent1]
WHERE [Extent1].[Id] > 5
GROUP BY [Extent1].[FirstName]
) AS [GroupBy1]";
using (var context = new ArubaContext())
{
var query = context.Owners.Where(o => o.Id > 5).GroupBy(o => o.FirstName).Select(g => new { FirstName = g.Key, AverageId = g.Average(p => p.Id) });
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
var results = query.ToList().OrderBy(r => r.AverageId).ToList();
var expected = context.Owners.ToList().Where(o => o.Id > 5).GroupBy(o => o.FirstName).Select(g => new { FirstName = g.Key, AverageId = g.Average(p => p.Id) }).OrderBy(r => r.AverageId).ToList();
QueryTestHelpers.VerifyQueryResult(expected, results, (o, i) => o.FirstName == i.FirstName && o.AverageId == i.AverageId);
}
}
[Fact]
public void GroupBy_is_optimized_when_projecting_function_aggregate_with_expression()
{
var expectedSql =
@"SELECT
[GroupBy1].[A1] AS [C1]
FROM ( SELECT
[Extent1].[K1] AS [K1],
MAX([Extent1].[A1]) AS [A1]
FROM ( SELECT
[Extent1].[FirstName] AS [K1],
[Extent1].[Id] * 2 AS [A1]
FROM [dbo].[ArubaOwners] AS [Extent1]
) AS [Extent1]
GROUP BY [K1]
) AS [GroupBy1]";
using (var context = new ArubaContext())
{
var query = context.Owners.GroupBy(p => p.FirstName).Select(g => g.Max(p => p.Id * 2));
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
var results = query.ToList();
var expected = context.Owners.ToList().GroupBy(p => p.FirstName).Select(g => g.Max(p => p.Id * 2)).ToList();
QueryTestHelpers.VerifyQueryResult(expected, results, (o, i) => o == i);
}
}
[Fact]
public void GroupBy_is_optimized_when_projecting_expression_with_multiple_function_aggregates()
{
var expectedSql =
@"SELECT
1 AS [C1],
[GroupBy1].[A1] - [GroupBy1].[A2] AS [C2]
FROM ( SELECT
[Extent1].[FirstName] AS [K1],
MAX([Extent1].[Id]) AS [A1],
MIN([Extent1].[Id]) AS [A2]
FROM [dbo].[ArubaOwners] AS [Extent1]
GROUP BY [Extent1].[FirstName]
) AS [GroupBy1]";
using (var context = new ArubaContext())
{
var query = context.Owners.GroupBy(o => o.FirstName).Select(g => new { maxMinusMin = g.Max(p => p.Id) - g.Min(s => s.Id) });
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
var results = query.ToList();
var expected = context.Owners.ToList().GroupBy(o => o.FirstName).Select(g => new { maxMinusMin = g.Max(p => p.Id) - g.Min(s => s.Id) }).ToList();
QueryTestHelpers.VerifyQueryResult(expected, results, (o, i) => o.maxMinusMin == i.maxMinusMin);
}
}
[Fact]
public void GroupBy_is_optimized_when_grouping_by_row_and_projecting_column_of_the_key_row()
{
var expectedSql =
@"SELECT
[Distinct1].[FirstName] AS [FirstName]
FROM ( SELECT DISTINCT
[Extent1].[FirstName] AS [FirstName]
FROM [dbo].[ArubaOwners] AS [Extent1]
WHERE [Extent1].[Id] < 4
) AS [Distinct1]";
using (var context = new ArubaContext())
{
var query = context.Owners.Where(o => o.Id < 4).GroupBy(g => new { g.FirstName }).Select(g => g.Key.FirstName);
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
var results = query.ToList();
var expected = context.Owners.ToList().Where(o => o.Id < 4).GroupBy(g => new { g.FirstName }).Select(g => g.Key.FirstName).ToList();
QueryTestHelpers.VerifyQueryResult(expected, results, (o, i) => o == i);
}
}
}
}
|
