Hi Riyafa, SQL ++ query results have no inherent ordering. In order to guarantee ordering you need to use an order clause in the query. Steven
On Sat, Oct 7, 2017 at 1:46 AM Riyafa Abdul Hameed <[email protected]> wrote: > Dear all, > > I have this query in my spatial implementation[1]: > > use GeoJSON; > SELECT VALUE {"Length": st_length(geo.myGeometry), > "Boundary":st_boundary(geo.myGeometry)} FROM Geometries geo WHERE > geometry_type(geo.myGeometry)="LineString" OR > geometry_type(geo.myGeometry)="MultiLineString"; > > > When this query is run in the SqlppExecutionTest[2] class which says > "Runs the SQL++ runtime tests with the storage parallelism." the result > obtained is: > > { "Length": 0.004058119099397876, "Boundary": > > {"type":"MultiPoint","coordinates":[[-69.1991349,-12.6006222],[-69.1975081,-12.6010968]],"crs":{"type":"name","properties":{"name":"EPSG:4326"}}} > } > { "Length": 8.48528137423857, "Boundary": > > {"type":"MultiPoint","coordinates":[[1,2],[7,8]],"crs":{"type":"name","properties":{"name":"EPSG:4326"}}} > } > { "Length": 78.9292222699217, "Boundary": > > {"type":"MultiPoint","coordinates":[[10,10],[10,40],[40,40],[30,10]],"crs":{"type":"name","properties":{"name":"EPSG:4326"}}} > } > { "Length": 0.0031622776601655037, "Boundary": > > {"type":"MultiPoint","coordinates":[[-113.98,39.198],[-113.981,39.195]],"crs":{"type":"name","properties":{"name":"EPSG:4326"}}} > } > > > When this query is run in the SqlppExecutionLessParallelismIT[3] which says > "Runs the SQL++ runtime tests with less parallelism on node controllers > than using all the cores." the result obtained is: > > { "Length": 8.48528137423857, "Boundary": > > {"type":"MultiPoint","coordinates":[[1,2],[7,8]],"crs":{"type":"name","properties":{"name":"EPSG:4326"}}} > } > { "Length": 0.004058119099397876, "Boundary": > > {"type":"MultiPoint","coordinates":[[-69.1991349,-12.6006222],[-69.1975081,-12.6010968]],"crs":{"type":"name","properties":{"name":"EPSG:4326"}}} > } > { "Length": 0.0031622776601655037, "Boundary": > > {"type":"MultiPoint","coordinates":[[-113.98,39.198],[-113.981,39.195]],"crs":{"type":"name","properties":{"name":"EPSG:4326"}}} > } > { "Length": 78.9292222699217, "Boundary": > > {"type":"MultiPoint","coordinates":[[10,10],[10,40],[40,40],[30,10]],"crs":{"type":"name","properties":{"name":"EPSG:4326"}}} > } > > > The order of th results are different. Hence one of the tests fails. I > don't seem to understand the reason for the difference. Any help or > explanations would be highly appreciated. > > [1] > > https://github.com/riyafa/asterixdb/blob/geometry/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/geojson/datatype/primitive.9.query.sqlpp > [2] > > https://github.com/apache/asterixdb/blob/master/asterixdb/asterix-app/src/test/java/org/apache/asterix/test/runtime/SqlppExecutionTest.java > [3] > > https://github.com/apache/asterixdb/blob/master/asterixdb/asterix-app/src/test/java/org/apache/asterix/test/runtime/SqlppExecutionLessParallelismIT.java > > Thank you, > Sincerely, > Riyafa >
