This all sounds somewhat wrong to me! It's not what I remember from design discussions of old... I don't think we should be doing byte by byte comparison between disparate types. Why would users want or expect that? Note that I'm talking about predicate cases - not internal needs like order by or routing of data. On Aug 19, 2015 11:47 AM, "Ildar Absalyamov" <[email protected]> wrote:
> @Steven > Index rewrite will not fire in this case, because of type mismatch. Hence > it will fallback to non-indexed query results. > > 2015-08-19 11:25 GMT-07:00 Taewoo Kim <[email protected]>: > > > @Steven: I never tried. However, it's worthwhile to check. If the query > > semantic is correct, the optimizer will try to utilize the index > regardless > > of its type. My guess is, at the end, byte-by-byte comparison will occur. > > > > Best, > > Taewoo > > > > On Wed, Aug 19, 2015 at 11:19 AM, Steven Jacobs <[email protected]> > wrote: > > > > > I think this is because the serialized versions of the list have their > > > lengths among the beginning bytes, so this would make sense, since we > > don't > > > have a comparator for lists. > > > > > > @Taewoo-What about the case of an index search? Is it okay to pass the > > > wrong type to the search (which will obviously yield unknown results) > > > > > > Steven > > > > > > On Wed, Aug 19, 2015 at 11:12 AM, Wail Alkowaileet <[email protected] > > > > > wrote: > > > > > > > Actually I observed some strange behavior while comparing > orderedLists > > in > > > > the order by clause. > > > > > > > > Input (dataset json): > > > > { "a": 1i32, "b": [ 1, "hello" ] } > > > > { "a": 2i32, "b": [ 1, "hello" ] } > > > > { "a": 3i32, "b": [ 1, "hi" ] } > > > > > > > > Query: > > > > for $x in dataset json > > > > order by $x.b > > > > return $x > > > > > > > > Result: > > > > { "a": 3i32, "b": [ 1, "hi" ] } > > > > { "a": 1i32, "b": [ 1, "hello" ] } > > > > { "a": 2i32, "b": [ 1, "hello" ] } > > > > > > > > it seems the behavior is comparing by the length of the list not the > > > values > > > > themselves? is it expected? > > > > > > > > But if I do something like this: > > > > for $x in dataset json > > > > order by $x.b[1] > > > > return $x > > > > > > > > Result: > > > > { "a": 1i32, "b": [ 1, "hello" ] } > > > > { "a": 2i32, "b": [ 1, "hello" ] } > > > > { "a": 3i32, "b": [ 1, "hi" ] } > > > > > > > > > > > > > > > > On Wed, Aug 19, 2015 at 1:50 PM, Taewoo Kim <[email protected]> > > wrote: > > > > > > > > > Sorry. The direction of inequality operator was misleading. STRING > 13 > > > is > > > > > smaller than (<) POINT 20. > > > > > > > > > > Best, > > > > > Taewoo > > > > > > > > > > On Wed, Aug 19, 2015 at 10:49 AM, Taewoo Kim <[email protected]> > > > wrote: > > > > > > > > > > > Yes. Type conversion (casting) only happens among numeric types > so > > > far. > > > > > > Actually, since there is a type-tag, if you try to compare two > non > > > > > numeric > > > > > > types, it stops the comparing as soon as it sees the first byte > > from > > > > both > > > > > > side since type-tag itself has the given order (e.g., STRING 13 > > > > POINT > > > > > > 20). This is required for ORDER BY, too. > > > > > > > > > > > > Best, > > > > > > Taewoo > > > > > > > > > > > > On Wed, Aug 19, 2015 at 10:45 AM, Steven Jacobs < > [email protected]> > > > > > wrote: > > > > > > > > > > > >> I see, so we are technically allowed to compare anything to > > > anything? > > > > > >> > > > > > >> Steven > > > > > >> > > > > > >> On Wed, Aug 19, 2015 at 10:37 AM, Taewoo Kim < > [email protected]> > > > > > wrote: > > > > > >> > > > > > >> > If there is no right comparator for the given types (STRING vs > > > > POINT), > > > > > >> then > > > > > >> > it does the "byte by byte" comparison. > > > > > >> > > > > > > >> > Best, > > > > > >> > Taewoo > > > > > >> > > > > > > >> > On Wed, Aug 19, 2015 at 10:32 AM, Steven Jacobs < > > [email protected] > > > > > > > > > >> wrote: > > > > > >> > > > > > > >> > > This is currently working in master: > > > > > >> > > > > > > > >> > > create type CSXType as closed { > > > > > >> > > id: int32, > > > > > >> > > csxid: string > > > > > >> > > } > > > > > >> > > create dataset CSX(CSXType) primary key id; > > > > > >> > > > > > > > >> > > for $b in dataset('CSX') > > > > > >> > > where $b.id > point("3,5") > > > > > >> > > return $b; > > > > > >> > > > > > > > >> > > Is this supposed to be working? > > > > > >> > > Steven > > > > > >> > > > > > > > >> > > > > > > >> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > *Regards,* > > > > Wail Alkowaileet > > > > > > > > > > > > > -- > Best regards, > Ildar >
