1. TAP Standards and Feedback
Deoyani Nandrekar-Heinis
Johns Hopkins University

2. Points of Discussion Upload tables Authentication VOSpace integration
ADQL and spatial queries
Other issues

3. Upload Tables Scope of tables Life of uploaded table Access
Usage and query edit

4. Authentication Upload access to only authorized user
User query and result access

5. VOSpace Integration Store results in user’s vospace
Store job.xml and result in vospace

6. ADQL and Spatial Queries
Generic Queries?
Spatial constraints
e.g. Using HTM ids
Complex Queries
Parsing Difficulties
Suggestions and Options

7. ADQL Example
ADQL (Spatial)
SELECT o.ra, o.dec FROM photoobjall as o WHERE CONTAINS( POINT('J2000', o.ra, o.dec), Region('CIRCLE J ')) = 1
SDSS SQL Query:
Select o.ra, o.dec From photoobjAll as o inner join dbo.fSphGetHtmRanges(dbo.fSphSimplifyString('CIRCLE J ')) h on o.HtmID between h.HtmIdStart and h.HtmIdEnd Where dbo.fSphRegionContainsXYZ(dbo.fSphSimplifyString('CIRCLE J '), o.cx ,o.cy,o.cz) = 1

8. ADQL and Spatial Queries
SELECT a.objid, a.ra, a.dec, b.objid, b.ra, b.dec FROM CatalogA AS a INNER JOIN CatalogB AS b ON CONTAINS(CIRCLE(a.ra, a.dec, 0.1), POIN T(b.ra, b.dec)) WHERE (some condition)
circle has to be calculated for every row in A in order to evaluate the query
HTM based optimization (not sufficient?)
Solution::
temporary tables, generate the HTM ranges, put an index on them and then do the BETWEEN query.

9. ADQL and Spatial Queries
CREATE TABLE ##htmtemp (ObjID bigint, HtmStart bigint, HtmEnd bigint) -- +
create the indices here: PK on ObjID, cover index on HtmStart/End INSERT ##htmtemp WITH (TABLOCK) (ObjID, HtmStart, HtmEnd) SELECT ObjID, htm.Start, htm.End FROM CatalogA CROSS APPLY dbo.fHtmCoverCircleEq(Ra, Dec, 0.1) AS htm
SELECT a.objid, a.ra, a.dec, b.objid, b.ra, b.dec FROM CatalogA AS a
INNER JOIN ##htmtemp htm ON htm.ObjID = a.ObjID INNER JOIN CatalogB AS b
ON dbo.fGetHtmEq(b.Ra, B.Dec) BETWEEN htm.HtmStart AND htm.HtmEnd WHERE ...

10. ADQL and Spatial Queries
CREATE TABLE ##htmtemp (ObjID bigint, HtmStart bigint, HtmEnd bigint) -- +
create the indices here: PK on ObjID, cover index on HtmStart/End INSERT ##htmtemp WITH (TABLOCK) (ObjID, HtmStart, HtmEnd) SELECT ObjID, htm.Start, htm.End FROM CatalogA CROSS APPLY dbo.fHtmCoverCircleEq(Ra, Dec, 0.1) AS htm
SELECT a.objid, a.ra, a.dec, b.objid, b.ra, b.dec FROM CatalogA AS a
INNER JOIN ##htmtemp htm ON htm.ObjID = a.ObjID INNER JOIN CatalogB AS b
ON dbo.fGetHtmEq(b.Ra, B.Dec) BETWEEN htm.HtmStart AND htm.HtmEnd WHERE ...
Multiway joins are slow!!

11. Special Spatial Objects bright in Optical and invisible in UV Query:
SELECT ...FROM SDSS AS a INNER JOIN Galex AS b ON NOT CONTAINS(CIRCLE(a.ra, a.dec, 0.1), POINT(b.ra, b.dec))
Ugly where clauses
WHERE CONTAINS(CIRCLE(POINT(a.ra, a.dec), 0.5), POINT(b.ra, b.dec) OR     CONTAINS(CIRCLE(POINT(a.ra + 0.2, a.dec + 0.2), 0.5), POINT(b.ra,b.dec)
Multiple conditions where clause
WHERE CONTAINS(CIRCLE(POINT(a.ra, a.dec), 0.5),
POINT(b.ra, b.dec) AND type= galaxy OR     CONTAINS(CIRCLE(POINT(a.ra, a.dec), 0.5), POINT(b.ra, b.dec) AND type= star

12. Suggestions Spatial region: only constant values
Spatial constraints: Outside where clause
CROSS MATCH : handling separately

13. Thank You !