UnionExpression Class

Definition

Namespace:

Microsoft.EntityFrameworkCore.Query.SqlExpressions

Assembly:

Microsoft.EntityFrameworkCore.Relational.dll

Package:

Microsoft.EntityFrameworkCore.Relational v9.0.0

Source:

UnionExpression.cs

An expression that represents a UNION operation in a SQL tree.

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

public class UnionExpression : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SetOperationBase

type UnionExpression = class
    inherit SetOperationBase

Public Class UnionExpression
Inherits SetOperationBase

Inheritance

Expression

TableExpressionBase

SetOperationBase

UnionExpression

Constructors

UnionExpression(String, SelectExpression, SelectExpression, Boolean, IReadOnlyDictionary<String,IAnnotation>)	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.
UnionExpression(String, SelectExpression, SelectExpression, Boolean)	Creates a new instance of the UnionExpression class.

Properties

Alias	The alias assigned to this table source. (Inherited from SetOperationBase)
Annotations	An indexed collection of annotations associated with this table expression. (Inherited from TableExpressionBase)
IsDistinct	The bool value indicating whether result will remove duplicate rows. (Inherited from SetOperationBase)
NodeType	(Inherited from TableExpressionBase)
Source1	The first source of the set operation. (Inherited from SetOperationBase)
Source2	The second source of the set operation. (Inherited from SetOperationBase)
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.
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. (Inherited from TableExpressionBase)
Print(ExpressionPrinter)	Creates a printable string representation of the given expression using ExpressionPrinter.
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.
Update(SelectExpression, SelectExpression)	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)	Reduces the node and then calls the visitor delegate on the reduced expression. The method throws an exception if the node is not reducible.
WithAlias(String)	Returns a copy of the current TableExpressionBase with the new provided alias.
WithAnnotations(IReadOnlyDictionary<String,IAnnotation>)	Creates an object like this with specified annotations.

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.