private void FlattenGroupBy(List <SqlExpression> exprs)
{
List <SqlExpression> list = new List <SqlExpression>(exprs.Count);
foreach (SqlExpression gex in exprs)
{
if (TypeSystem.IsSequenceType(gex.ClrType))
{
throw Error.InvalidGroupByExpressionType(gex.ClrType.Name);
}
this.FlattenGroupByExpression(list, gex);
}
exprs.Clear();
exprs.AddRange(list);
}
internal override Expression VisitMemberAccess(MemberExpression m)
{
if (MetaPosition.AreSameMember(m.Member, this.association.ThisMember.Member))
{
Expression[] keyValues = GetKeyValues(this.Visit(m.Expression), this.association.ThisKey);
return(WhereClauseFromSourceAndKeys(this.otherSouce, this.association.OtherKey.ToArray(), keyValues));
}
Expression exp = this.Visit(m.Expression);
if (exp != m.Expression)
{
if (exp.Type != m.Expression.Type && m.Member.Name == "Count" && TypeSystem.IsSequenceType(exp.Type))
{
return(Expression.Call(typeof(Enumerable), "Count", new Type[] { TypeSystem.GetElementType(exp.Type) }, exp));
}
return(Expression.MakeMemberAccess(exp, m.Member));
}
return(m);
}