public override SqlFragment Visit(DbElementExpression expression)
{
SelectStatement s = VisitInputExpressionEnsureSelect(expression.Argument, null, null);
s.Wrap(scope);
return(s);
}
public SelectStatement WrapIfNotCompatible(SelectStatement select, DbExpressionKind expressionKind)
{
if (select.IsCompatible(expressionKind))
{
return(select);
}
SelectStatement newSelect = new SelectStatement();
select.Wrap(scope);
select.Scoped = true;
newSelect.From = select;
return(newSelect);
}
private InputFragment WrapJoinInputIfNecessary(InputFragment fragment, bool isRightPart)
{
if (fragment is SelectStatement || fragment is UnionFragment)
{
fragment.Wrap(scope);
fragment.Scoped = true;
}
else if (fragment is JoinFragment && isRightPart)
{
SelectStatement select = new SelectStatement();
select.From = fragment;
select.Name = fragment.Name;
select.Wrap(scope);
return(select);
}
return(fragment);
}
private InputFragment WrapJoinInputIfNecessary(InputFragment fragment, bool isRightPart)
{
if (fragment is SelectStatement || fragment is UnionFragment)
{
fragment.Wrap(scope);
fragment.Scoped = true;
}
else if (fragment is JoinFragment && isRightPart)
{
SelectStatement select = new SelectStatement();
select.From = fragment;
select.Name = fragment.Name;
select.Wrap(scope);
return select;
}
return fragment;
}
public SelectStatement WrapIfNotCompatible(SelectStatement select, DbExpressionKind expressionKind)
{
if (select.IsCompatible(expressionKind)) return select;
SelectStatement newSelect = new SelectStatement();
select.Wrap(scope);
select.Scoped = true;
newSelect.From = select;
return newSelect;
}
