/Source/facebook.Linq/Linq/FqlModel/Expression.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Linq.Expressions;



namespace facebook.Linq

{

	internal abstract class SqlExpression : SqlNode

	{

		// Fields

		private Type clrType;



		// Methods

		internal SqlExpression(SqlNodeType nodeType, Type clrType, Expression sourceExpression)

			: base(nodeType, sourceExpression)

		{

			this.clrType = clrType;

		}



		internal void SetClrType(Type type)

		{

			this.clrType = type;

		}



		// Properties

		internal Type ClrType

		{

			get

			{

				return this.clrType;

			}

		}



		internal bool IsConstantColumn

		{

			get

			{

				//if (base.NodeType == SqlNodeType.Column)

				//{

				//  SqlColumn column = (SqlColumn)this;

				//  if (column.Expression != null)

				//  {

				//    return column.Expression.IsConstantColumn;

				//  }

				//}

				//else

				//{

				//  if (base.NodeType == SqlNodeType.ColumnRef)

				//  {

				//    return ((SqlColumnRef)this).Column.IsConstantColumn;

				//  }

				//  if (base.NodeType == SqlNodeType.OptionalValue)

				//  {

				//    return ((SqlOptionalValue)this).Value.IsConstantColumn;

				//  }

				//  if ((base.NodeType == SqlNodeType.Value) || (base.NodeType == SqlNodeType.Parameter))

				//  {

				//    return true;

				//  }

				//}

				//return false;

				return false;

			}

		}



		internal abstract ProviderType SqlType { get; }

	}



 



}