private Expression AliasByJoin(JoinChainer source, ByArgument arg)
{
var target = _GetTargetByAlias(source, arg.Alias, true);
if (!source.HasNode || !target.HasNode)
{
throw JoinerException(source, target, QueryTalkExceptionType.InvalidJoinTable);
}
var expression = _GetMappedExpression(source, target, DB3.Default);
source.AppendJoinGraph(target.JoinGraph);
return(expression);
}
private static Expression _GetNonMappedExpression(ByArgument byArg, string sourceAlias)
{
return(String.Format("{0}.{1} = {2}.{3}",
Filter.Delimit(sourceAlias), Filter.Delimit(byArg.Column),
Filter.Delimit(byArg.Alias), Filter.Delimit(byArg.Column)).E());
}
private Expression NonMappedByJoin(JoinChainer source, ByArgument arg)
{
_GetTargetByAlias(source, arg.Alias, false);
return(_GetNonMappedExpression(arg, source.Alias.Name));
}
