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[release/3.1] Query: Simplify SQL generated for optional owned/weak entities when table splitting #19871

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Feb 14, 2020
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[release/3.1] Query: Simplify SQL generated for optional owned/weak entities when table splitting #19871

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46cd9b1
Query: Simplify SQL generated for optional owned/weak entities when t…
smitpatel Feb 10, 2020
b31edb7
Add quirk for issue18299
smitpatel Feb 11, 2020
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43 changes: 36 additions & 7 deletions src/EFCore.Relational/Query/SqlExpressionFactory.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -490,7 +490,7 @@ private void AddConditions(

if (sharingTypes.Count > 0)
{
bool discriminatorAdded = AddDiscriminatorCondition(selectExpression, entityType);
var discriminatorAdded = AddDiscriminatorCondition(selectExpression, entityType);

var linkingFks = entityType.GetRootType().FindForeignKeys(entityType.FindPrimaryKey().Properties)
.Where(
Expand All @@ -508,14 +508,43 @@ private void AddConditions(

if (!skipJoins)
{
AddInnerJoin(selectExpression, linkingFks[0], sharingTypes, skipInnerJoins: false);

foreach (var otherFk in linkingFks.Skip(1))
if (AppContext.TryGetSwitch("Microsoft.EntityFrameworkCore.Issue18299", out var isEnabled) && isEnabled)
{
var otherSelectExpression = new SelectExpression(entityType);
AddInnerJoin(selectExpression, linkingFks[0], sharingTypes, skipInnerJoins: false);

foreach (var otherFk in linkingFks.Skip(1))
{
var otherSelectExpression = new SelectExpression(entityType);

AddInnerJoin(otherSelectExpression, otherFk, sharingTypes, skipInnerJoins: false);
selectExpression.ApplyUnion(otherSelectExpression, distinct: true);
AddInnerJoin(otherSelectExpression, otherFk, sharingTypes, skipInnerJoins: false);
selectExpression.ApplyUnion(otherSelectExpression, distinct: true);
}
}
else
{
var first = true;

foreach (var foreignKey in linkingFks)
{
if (!(entityType.FindOwnership() == foreignKey
&& foreignKey.PrincipalEntityType.BaseType == null))
{
var otherSelectExpression = first
? selectExpression
: new SelectExpression(entityType);

AddInnerJoin(otherSelectExpression, foreignKey, sharingTypes, skipInnerJoins: false);

if (first)
{
first = false;
}
else
{
selectExpression.ApplyUnion(otherSelectExpression, distinct: true);
}
}
}
}
}
}
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20 changes: 8 additions & 12 deletions test/EFCore.SqlServer.FunctionalTests/DataAnnotationSqlServerTest.cs
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Expand Up @@ -151,32 +151,28 @@ public override void ConcurrencyCheckAttribute_throws_if_value_in_database_chang
@"SELECT TOP(1) [s].[UniqueNo], [s].[MaxLengthProperty], [s].[Name], [s].[RowVersion], [t].[UniqueNo], [t].[AdditionalDetails_Name], [t0].[UniqueNo], [t0].[Details_Name]
FROM [Sample] AS [s]
LEFT JOIN (
SELECT [s0].[UniqueNo], [s0].[AdditionalDetails_Name], [s1].[UniqueNo] AS [UniqueNo0]
SELECT [s0].[UniqueNo], [s0].[AdditionalDetails_Name]
FROM [Sample] AS [s0]
INNER JOIN [Sample] AS [s1] ON [s0].[UniqueNo] = [s1].[UniqueNo]
WHERE [s0].[AdditionalDetails_Name] IS NOT NULL
) AS [t] ON [s].[UniqueNo] = [t].[UniqueNo]
LEFT JOIN (
SELECT [s2].[UniqueNo], [s2].[Details_Name], [s3].[UniqueNo] AS [UniqueNo0]
FROM [Sample] AS [s2]
INNER JOIN [Sample] AS [s3] ON [s2].[UniqueNo] = [s3].[UniqueNo]
WHERE [s2].[Details_Name] IS NOT NULL
SELECT [s1].[UniqueNo], [s1].[Details_Name]
FROM [Sample] AS [s1]
WHERE [s1].[Details_Name] IS NOT NULL
) AS [t0] ON [s].[UniqueNo] = [t0].[UniqueNo]
WHERE [s].[UniqueNo] = 1",
//
@"SELECT TOP(1) [s].[UniqueNo], [s].[MaxLengthProperty], [s].[Name], [s].[RowVersion], [t].[UniqueNo], [t].[AdditionalDetails_Name], [t0].[UniqueNo], [t0].[Details_Name]
FROM [Sample] AS [s]
LEFT JOIN (
SELECT [s0].[UniqueNo], [s0].[AdditionalDetails_Name], [s1].[UniqueNo] AS [UniqueNo0]
SELECT [s0].[UniqueNo], [s0].[AdditionalDetails_Name]
FROM [Sample] AS [s0]
INNER JOIN [Sample] AS [s1] ON [s0].[UniqueNo] = [s1].[UniqueNo]
WHERE [s0].[AdditionalDetails_Name] IS NOT NULL
) AS [t] ON [s].[UniqueNo] = [t].[UniqueNo]
LEFT JOIN (
SELECT [s2].[UniqueNo], [s2].[Details_Name], [s3].[UniqueNo] AS [UniqueNo0]
FROM [Sample] AS [s2]
INNER JOIN [Sample] AS [s3] ON [s2].[UniqueNo] = [s3].[UniqueNo]
WHERE [s2].[Details_Name] IS NOT NULL
SELECT [s1].[UniqueNo], [s1].[Details_Name]
FROM [Sample] AS [s1]
WHERE [s1].[Details_Name] IS NOT NULL
) AS [t0] ON [s].[UniqueNo] = [t0].[UniqueNo]
WHERE [s].[UniqueNo] = 1",
//
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3 changes: 1 addition & 2 deletions test/EFCore.SqlServer.FunctionalTests/PropertyEntrySqlServerTest.cs
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Expand Up @@ -21,9 +21,8 @@ public override void Property_entry_original_value_is_set()
@"SELECT TOP(1) [e].[Id], [e].[EngineSupplierId], [e].[Name], [t].[Id], [t].[StorageLocation_Latitude], [t].[StorageLocation_Longitude]
FROM [Engines] AS [e]
LEFT JOIN (
SELECT [e0].[Id], [e0].[StorageLocation_Latitude], [e0].[StorageLocation_Longitude], [e1].[Id] AS [Id0]
SELECT [e0].[Id], [e0].[StorageLocation_Latitude], [e0].[StorageLocation_Longitude]
FROM [Engines] AS [e0]
INNER JOIN [Engines] AS [e1] ON [e0].[Id] = [e1].[Id]
WHERE [e0].[StorageLocation_Longitude] IS NOT NULL AND [e0].[StorageLocation_Latitude] IS NOT NULL
) AS [t] ON [e].[Id] = [t].[Id]
ORDER BY [e].[Id]",
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