SqlTreePruner Class

Definition

Namespace:

Microsoft.EntityFrameworkCore.Query

Assembly:

Microsoft.EntityFrameworkCore.Relational.dll

Package:

Microsoft.EntityFrameworkCore.Relational v9.0.0

Source:

SqlTreePruner.cs

A visitor that processes a SQL tree and prunes out parts which aren't needed.

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

public class SqlTreePruner : System.Linq.Expressions.ExpressionVisitor

type SqlTreePruner = class
    inherit ExpressionVisitor

Public Class SqlTreePruner
Inherits ExpressionVisitor

Inheritance

ExpressionVisitor

SqlTreePruner

Constructors

SqlTreePruner()

Properties

CurrentTableAlias	When visiting a nested TableExpressionBase (e.g. a select within a set operation), this holds the table alias of the top-most table (the one which has the alias referenced by columns). This is needed in order to properly prune the projection of such nested selects, which don't themselves have an alias.
ReferencedColumnMap	Maps table aliases to the list of column aliases found referenced on them.

Methods

Prune(Expression)	Prunes the given Expression, removing parts which aren't needed.
PruneSelect(SelectExpression, Boolean)	Prunes a SelectExpression, removes tables inside it which aren't referenced, and optionally also projections which aren't referenced from outside it.
PruneTopLevelSelect(SelectExpression)	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.
VisitExtension(Expression)	Visits the children of the extension expression.