This class models the Projection operation, which extracts a given set of fields from a given
RelationalExpression.
Inheritance Hierarchy
| Object | ||||
 | VisitableBase | |||
| AlgebraicExpression | |||
| RelationalExpression | |||
| Projection | |||
Assembly: Epic.Query
Declaration Syntax
| C# |
[SerializableAttribute] public sealed class Projection : RelationalExpression, IEquatable<Projection>
Members
| All Members | Constructors | Methods | Properties | ||
| Member | Description | |
|---|---|---|
 | Projection(RelationalExpression, IEnumerable<(Of <<'(RelationAttribute>)>>)) |
Initializes a new instance of the Projection class.
|
| Accept<(Of <<'(TResult>)>>)(IVisitor<(Of <<'(TResult>)>>), IVisitContext) |
Accept the specified visitor and context.
(Overrides VisitableBase.Accept<(Of <<'(TResult>)>>)(IVisitor<(Of <<'(TResult>)>>), IVisitContext).) |
 | Attributes |
Gets the attributes extracted from the given table.
|
| Equals(RelationalExpression) |
Determines whether the specified RelationalExpression is equal to the current Projection.
(Overrides RelationalExpression.Equals(RelationalExpression).) |
| Equals(Projection) |
Determines whether the specified Projection is equal to the
current Projection.
|
| GetHashCode()()()() |
Serves as a hash function for a Projection object.
(Overrides RelationalExpression.GetHashCode()()()().) |
| Relation |
Gets the RelationalExpression used as source for the projection.
|