JoinExpressionBase Class

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

An expression that represents a JOIN in a SQL tree.

This type is typically used by database providers (and other extensions). It is generally not used in application code.

public abstract class JoinExpressionBase : Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase

type JoinExpressionBase = class
    inherit TableExpressionBase

Public MustInherit Class JoinExpressionBase
Inherits TableExpressionBase

Inheritance: Expression

TableExpressionBase
JoinExpressionBase

Derived: Microsoft.EntityFrameworkCore.Query.SqlExpressions.CrossApplyExpression

Microsoft.EntityFrameworkCore.Query.SqlExpressions.CrossJoinExpression

Microsoft.EntityFrameworkCore.Query.SqlExpressions.OuterApplyExpression

Microsoft.EntityFrameworkCore.Query.SqlExpressions.PredicateJoinExpressionBase

Constructors

JoinExpressionBase(TableExpressionBase, Boolean, IReadOnlyDictionary<String,IAnnotation>)	Creates a new instance of the JoinExpressionBase class.
JoinExpressionBase(TableExpressionBase, IEnumerable<IAnnotation>)	Creates a new instance of the JoinExpressionBase class.
JoinExpressionBase(TableExpressionBase)	Creates a new instance of the JoinExpressionBase class.

Properties

Alias	The alias assigned to this table source. (Inherited from TableExpressionBase)
Annotations	An indexed collection of annotations associated with this table expression. (Inherited from TableExpressionBase)
IsPrunable	Whether this join expression may be pruned if nothing references a column on it. This isn't the case, for example, when an INNER JOIN is used to filter out rows.
NodeType	(Inherited from TableExpressionBase)
Table	Gets the underlying table source to join with.
Type	(Inherited from TableExpressionBase)

Methods

AddAnnotation(String, Object)	Adds an annotation to this object. Throws if an annotation with the specified name already exists. (Inherited from TableExpressionBase)
Clone(String, ExpressionVisitor)	Creates a new object that is a copy of the current instance.
Clone(String, ExpressionVisitor)	Creates a new object that is a copy of the current instance. (Inherited from TableExpressionBase)
CreateWithAnnotations(IEnumerable<IAnnotation>)	Creates an object like this with specified annotations. (Inherited from TableExpressionBase)
Equals(Object)	System.Linq.Expressions.Expression.Equals(System.Object)
FindAnnotation(String)	Gets the annotation with the given name, returning `null` if it does not exist. (Inherited from TableExpressionBase)
GetAnnotations()	Gets all annotations on the current object. (Inherited from TableExpressionBase)
GetHashCode()	System.Linq.Expressions.Expression.GetHashCode
GetRequiredAlias()	This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.
GetRequiredAlias()	This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release. (Inherited from TableExpressionBase)
Print(ExpressionPrinter)	Creates a printable string representation of the given expression using ExpressionPrinter. (Inherited from TableExpressionBase)
PrintAnnotations(ExpressionPrinter)	Creates a printable string representation of annotations associated with the given expression using ExpressionPrinter. (Inherited from TableExpressionBase)
Quote()	Quotes the expression; that is, returns an expression that, when evaluated, would construct an expression identical to this one. Used to generate code for precompiled queries, which reconstructs this expression. (Inherited from TableExpressionBase)
Update(TableExpressionBase)	Creates a new expression that is like this one, but using the supplied children. If all of the children are the same, it will return this expression.
VisitChildren(ExpressionVisitor)	(Inherited from TableExpressionBase)
WithAlias(String)	The implementation of WithAlias(String) for join expressions always throws, since the alias on joins is always `null`. Set the alias on the enclosed table expression instead.
WithAlias(String)	Returns a copy of the current TableExpressionBase with the new provided alias. (Inherited from TableExpressionBase)
WithAnnotations(IReadOnlyDictionary<String,IAnnotation>)	Creates an object like this with specified annotations. (Inherited from TableExpressionBase)

Explicit Interface Implementations

IPrintableExpression.Print(ExpressionPrinter)

Creates a printable string representation of the given expression using ExpressionPrinter.

(Inherited from TableExpressionBase)

Extension Methods

UnwrapJoin(TableExpressionBase)

If the given table is a JoinExpressionBase, returns the table it joins to. Otherwise, returns table.

Applies to

共用方式為