Class TableExpressionBase
- Namespace
- Microsoft.EntityFrameworkCore.Query.SqlExpressions
- Assembly
- Microsoft.EntityFrameworkCore.Relational.dll
An expression that represents a table source 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 TableExpressionBase : Expression, IPrintableExpression
- Inheritance
-
TableExpressionBase
- Implements
-
IPrintableExpression
- Derived
- Inherited Members
Constructors
TableExpressionBase(string?)
Creates a new instance of the TableExpressionBase class.
protected TableExpressionBase(string? alias)
Parameters
alias
stringA string alias for the table source.
TableExpressionBase(string?, IEnumerable<IAnnotation>?)
Creates a new instance of the TableExpressionBase class.
protected TableExpressionBase(string? alias, IEnumerable<IAnnotation>? annotations)
Parameters
alias
stringA string alias for the table source.
annotations
IEnumerable<IAnnotation>A collection of annotations associated with this expression.
Properties
Alias
The alias assigned to this table source.
public virtual string? Alias { get; }
Property Value
NodeType
public override sealed ExpressionType NodeType { get; }
Property Value
Type
public override Type Type { get; }
Property Value
Methods
AddAnnotation(string, object?)
Adds an annotation to this object. Throws if an annotation with the specified name already exists.
public virtual TableExpressionBase AddAnnotation(string name, object? value)
Parameters
name
stringThe key of the annotation to be added.
value
objectThe value to be stored in the annotation.
Returns
- TableExpressionBase
The new expression with annotation applied to it.
CreateWithAnnotations(IEnumerable<IAnnotation>)
Creates an object like this with specified annotations.
protected abstract TableExpressionBase CreateWithAnnotations(IEnumerable<IAnnotation> annotations)
Parameters
annotations
IEnumerable<IAnnotation>The annotations to be applied.
Returns
- TableExpressionBase
The new expression with given annotations.
Equals(object?)
public override bool Equals(object? obj)
Parameters
obj
object
Returns
FindAnnotation(string)
Gets the annotation with the given name, returning null if it does not exist.
public virtual IAnnotation? FindAnnotation(string name)
Parameters
name
stringThe key of the annotation to find.
Returns
- IAnnotation
The existing annotation if an annotation with the specified name already exists. Otherwise, null.
GetAnnotations()
Gets all annotations on the current object.
public virtual IEnumerable<IAnnotation> GetAnnotations()
Returns
- IEnumerable<IAnnotation>
GetHashCode()
public override int GetHashCode()
Returns
Print(ExpressionPrinter)
Creates a printable string representation of the given expression using Microsoft.EntityFrameworkCore.Query.ExpressionPrinter.
protected abstract void Print(ExpressionPrinter expressionPrinter)
Parameters
expressionPrinter
ExpressionPrinterThe expression printer to use.
PrintAnnotations(ExpressionPrinter)
Creates a printable string representation of annotations associated with the given expression using Microsoft.EntityFrameworkCore.Query.ExpressionPrinter.
protected virtual void PrintAnnotations(ExpressionPrinter expressionPrinter)
Parameters
expressionPrinter
ExpressionPrinterThe expression printer to use.
VisitChildren(ExpressionVisitor)
protected override Expression VisitChildren(ExpressionVisitor visitor)
Parameters
visitor
ExpressionVisitor