Class Union

Namespace: eQuantic.Core.Data.Query

Assembly: eQuantic.Core.Data.dll

The entry point for composing a typed UNION/UNION ALL: each branch reads one entity type, optionally filtered, projected into the common result shape — an anonymous type or a member-init POCO whose members are entity members or constants (constants tag which branch a row came from). Combine branches with All<TResult>(params UnionBranch<TResult>[]) (keep duplicates) or Distinct<TResult>(params UnionBranch<TResult>[]) (SQL UNION semantics), and run the query on a unit of work that implements IUnionQueryRunner.

public static class Union

Inheritance: object

Union

Inherited Members: object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Examples

var feed = UnionQuery.All(
        Union.Of<Order>().Where(x => x.Status == "overdue")
            .Select(x => new { Name = x.Customer, Origin = "order" }),
        Union.Of<Buyer>()
            .Select(x => new { x.Name, Origin = "buyer" }))
    .OrderBy(row => row.Name)
    .Take(20);
var rows = await unitOfWork.UnionAsync(feed);

Methods

Of<TEntity>()

Starts a union branch over TEntity.

public static UnionSource<TEntity> Of<TEntity>() where TEntity : class

Returns

UnionSource<TEntity>

Type Parameters